Search
Search results for
We found
132 results for you
-
Influence of Soil Organic Matter Content on the Responsiveness of Eucalyptus grandis to Nitrogen Fertiliser
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A.D. Noble --- Institute for Commercial Forestry Research, South Africa M.A. Herbert --- Institute for Commercial Forestry Research, South AfricaIt is widely recognised that the inherent nitrogen (N) mineralisation capacity of a soil is directly related to the organic matter content. Consequently, in estimating the N requirements of Eucalyptus grandis at planting this mineralisation potential must be taken into... -
The Influence of Site Factors on the Foliar Nutrient Content of Eucalyptus grandis in Natal
Item type: Journal Article • Journal: South African Forestry Journal • Authors: M.A. Herbert --- Institute for Commercial Forestry Research, South AfricaAlthough foliar analysis is commonly used to diagnose the nutritional status of trees and their ability to respond to fertilising, it is also a measure of site type and quality. The availability of nutrients in the soil varies with climatic... -
Regeneration Procedures of Pinus radiata in the Southern Cape Province
Item type: Journal Article • Journal: South African Forestry Journal • Authors: J.B. Zwolinski --- , USA D. G.M. Donald --- Forestry Faculty, A. van Laar --- Forestry Faculty,The present paper is part 3 in the series of publications dealing with the regeneration of Pinus radiata in the Southern Cape Province. The objective of the study was to compare the organic carbon contents in the soils and the... -
Herbage intake by cattle on tarchonanthus veld in the Northern Cape as affected by stocking rate and grazing system1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J H Fourie --- Department of Agriculture (Free State Region), E A N Engels --- Department of Agriculture (Free State Region), B R Roberts --- Department of Pasture Science,In a trial with young Bonsmara cattle, four different stocking rates (10, 7, 6 and 4 ha/large stock unit) were applied in both a rotational and continuous grazing system. Feed intake was estimated during spring, summer, autumn and winter for... -
Voluntary intake of several planted pastures by sheep and an assessment of NDF and IVDOM as possible predictors of intake
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.H. Meissner --- Department of Livestock Science, Republic of South Africa W.A. van Niekerk --- Department of Livestock Science, Republic of South Africa E.B. Spreeth --- Department of Livestock Science, Republic of South Africa H.H. Köster --- Department of Livestock Science, Republic of South AfricaThe aim was to study the quality and quantity of pasture selected by sheep on various planted pastures. A further aim was to assess NDF and IVDOM as easy measurable parameters for use in equations to predict intake. Pasture samples... -
Considerations on the sustainability and environmental impact of intensive pastures
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Miles --- Department of Agricultural Development, Republic of South Africa A.D. Manson --- Department of Agricultural Development, Republic of South AfricaIntensive pastures form an important component of livestock production systems in South Africa. The sustainability and environmental impact of intensive pastures via their effects on soil properties and nutrient fluxes vary considerably depending on the systems adopted. Soil organic C... -
Die rol van sekere omgewingsfaktore by alachloraktiwiteit
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Departement Plantproduksie, P.C. Nel --- Departement Plantproduksie,Biotoetse met graansorghum (Sorghum bicolor L.) is in potte in glashuise en groeikabinette uitgevoer. Geselekteerde grond- eienskappe is gekorreleer met alachloraktiwiteit. Organiese materiaalinhoud (% C) was die beste gekorreleerd met die aktiwiteit van alachlor en pH die swakste. Die r-waardes... -
Anorganiese stikstof in mieliegronde van die Oranje-Vrystaat en Transvaal met planttyd, 1984
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-Afrika R. du T. Burger --- Departement van Grondkunde, Republiek van Suid-AfrikaOndersoek is ingestel na die hoeveelheid anorganiese stikstof wat met planttyd gedurende die 1984/85-seisoen in mieliegronde van die Oranje-Vrystaat en Transvaal teenwoordig was. By 82 lokaliteite, wat verspreid oor hierdie gebied voorkom, is grondmonsters ingesamel. Grondmonsters is op 300 mm... -
Improving the fermentation ability of unripe air-cured tobacco
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.G. Nel --- , Republic of South Africa C.R. Wall --- , Republic of South AfricaThe fermentation of dark air-cured tobacco depends on its fermentation ability. Dry spells during the growth period can contribute towards unripe tobacco with poor fermentation ability. By blending such tobacco at a 1:1 ratio with tobacco of good fermentation ability,... -
Soil aggregate stability: The contribution of biological and physical processes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.B. Molope --- Crop production, Agriculture Department, Private Bag X2039,The roles of fungal growth, soil organic matter and particle re-orientation in soil aggregate stabilization during ageing of two British soils with different cropping histories were studied. Soils were subjected to simulated cultivation, and the subsequent changes in aggregate stability... -
The effect of reduced tillage on soil organic carbon
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. v. H. van der Watt --- Department of Soil Science, Republic of South AfricaThe organic carbon contents of the 0–15-cm and 15–30-cm layers of conventionally tilled, stubble-mulched and no-tilled soils were compared. Samples from four localities in the Transvaal and Orange Free State were analyzed for organic C by means of two methods... -
Changes in a Doveton clay loam after 12 years of direct-drill maize production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.B. Mallett --- , Republic of South Africa P.M. Lang --- , Republic of South Africa A.J. Arathoon --- , Republic of South AfricaAfter 8 years of direct-drill maize production at Cedara on a Hutton/Doveton clay loam (Typic Plinthustult) it was found that the top 120-mm layer had become somewhat denser and that organic carbon levels in the top 20 mm were higher... -
Rapid simultaneous rating of soil texture, organic matter, total nitrogen and nitrogen mineralization potential by near infra-red reflectance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.H. Meyer --- , Republic of South AfricaA rapid non-destructive technique for the determination of various soil properties by near infra-red spectrophotometry is described. Over 100 soils, of which the organic matter content, total nitrogen (N) content, N-mineralizing potential and particle size distribution were known, were used... -
Importance of selected soil properties on the bioactivity of alachlor and metolachlor
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaBioassays with grain sorghum (Sorghum bicolor L. Moench) cultivar NK222 were conducted in a glasshouse. Thirty-four natural soils were used in each of two experiments with alachlor [2-chloro-2′,6′-diethyl-N- (methoxymethyl) acetanilide] and metolachlor [2-chloro-6′-ethyl-N-(2-methoxy-1-methylethyl)acet-otoluidide] respectively. Linear regression analyses were performed to... -
Loss of nitrogen fertility and its restoration in some Orange Free State soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.A. Prinsloo --- Department of Soil Science, Republic of South Africa G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaThe effects of present or past cultivation on nitrogen fertility in some central Orange Free State soils were investigated by the comparison of paired samples of cultivated or reverted soils with uncultivated soils situated as closely as possible to one... -
Importance of selected soil properties on the bioactivity of acetochlor and metazachlor
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaThe bioactivity of acetochlor (2-chloro-N-(ethoxymethyl)-6′-ethyl-o-acetotoluidide) and metazachlor (2- chloro-N-(1-pyrazolylmethyl)-aceto-2′,6′-xylidide) was evaluated in thirty-two soils under controlled conditions. Grain sorghum (Sorghum bicolor L. Moench) cultivar NK222 was used as the indicator plant in the bioassays. Bioactivity was correlated with organic matter... -
Persistence of atrazine as affected by selected soil properties
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.F. Reinhardt --- Department of Plant Production, Republic of South Africa J.G. Ehlers --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaThe relationships between selected soil properties and the bioactivity of atrazine (2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine) were investigated in field trials. Bioactivity was determined periodically for up to twelve months on a variety of soil types using oats (Avena sativa L.) as the test... -
Nitraatontledings as hulpmiddel by stikstofbemestingaanbevelings in die westelike mielieproduserende gebiede van Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.P. van der Walt --- , Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie ondersoek is onderneem om vas te stei of nitraatontledings gebruik kan word om die huidige stikstof- bemestingsriglyne in die westelike mielieproduserende gebiede te verfyn. Verskeie stikstofbemestingsproewe is by verskillende terreine in die gebiede uitgevoer. By elk van die 14... -
Die verwantskap tussen maksimum nitrifikasietempo en relevante eienskappe van gronde vanaf die sentrale besproeiingsgebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Laubscher --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie oogmerk van die studie was om die verwantskappe tussen maksimum nitrifikasietempo (Kmaks) en relevante eienskappe van die gronde vanaf die sentrale besproeiingsgebiede uit te wys. Die verloop van nitrifikasie is in agt gronde, afkomstig van die gebiede, gemonitor na... -
Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. P.J. Thormählen --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie oogmerk met die studie was om die omvang van urease-aktiwiteite in die besproeide gronde vas te stel en watter grondparameters dit beïnvloed. Die verloop van hidrolise is in agt gronde, afkomstig van die sentrale besproeiingsgebiede, gemonitor na toediening van... -
Long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaSustainable farming in the semi-arid interior of South Africa requires the adoption of conservation practices to maintain and, if possible, increase soil fertility. The effects of some such practices on the nitrogen fertility of a hydromorphic sandy clay loam soil... -
Verwantskap tussen organiese materiaalinhoud van sekere onversteurde bogronde, grondeienskappe en klimaatsdata in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie doel met die ondersoek was om vas te stel of die organiese materiaalinhoud van onversteurde ortiese A-horisonte, wat deur rooi apedale, geelbruin apedale en sagte plintiese B-horisonte onderlê word, vanaf beskikbare of maklik meetbare grondeienskappe en klimaatsdata bereken kan... -
Effects of sample drying temperature on indices of available nitrogen in soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaDuring a field trial investigation into the long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat, it was observed that sample preparation had an effect on some indices of available nitrogen. The trial... -
Nitrogen mineralization in selected soils from the maize producing areas of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: GailA. van der Mey --- , Republic of South Africa H.M. Combrink --- , Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaThe aim of this study was to relate nitrogen mineralization from soil to selected soil properties more easily obtained in the laboratory. Net nitrogen mineralization was determined to varying depths (0–200, 200–400 and 400–600 mm) in 21 soil profiles from... -
Effek van bewerking op die organiese materiaalinhoud van geselekteerde droëlandgronde in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-Afrika M. Hensley --- , Republiek van Suid-Afrika A. T.P. Bennie --- Departement van Grondkunde, Republiek van Suid-AfrikaDie doel van die ondersoek was om (1) die effek van bewerking op die organiese materiaalinhoud van gronde te kwantifiseer indien onversteurde gronde as verwysing dien; (2) die verband tussen bewerkingstyd en die afname in organiese materiaal te kry en... -
The effect of oven-drying on residual inorganic nitrogen in soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaResidual ammonium nitrogen in soils which were dried in an oven increased, whereas residual nitrate nitrogen remained almost constant. This observation led to experiments which help to explain the accumulation of ammonium nitrogen in oven-dried soils. It was found that... -
Swawelfraksies, -verhoudings en -verwantskappe in geselekteerde onversteurde en bewerkte Suid-Afrikaanse gronde
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement Grondkunde, Republiek van Suid-AfrikaDie negatiewe invloed van bewerking op organiese materiaal in gronde en 'n groot afname in die eksterne insette van S het die vraag laat ontstaan of die swawelstatus van Suid-Afrikaanse gronde voldoende is om volhoubare gewasproduksie te verseker. Bewerkte en... -
Phosphorus sorption in Natal soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.H. Bainbridge --- Department of Agriculture, Republic of South Africa N. Miles --- Department of Agriculture, Republic of South Africa R. Praan --- Department of Agriculture, Republic of South Africa M.A. Johnston --- Department of Agronomy, Republic of South AfricaPhosphorus (P) sorption poses a severe constraint on the ability of many soils to supply adequate amounts of P to plants. In an effort to quantify the P sorption capacities of soils in Natal, P sorption isotherms of 50 topsoils... -
Effect of cultivation on the nitrogen fertility of selected dryland soils in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. du Toit --- , Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaThis study is part of an investigation into the effect of cultivation on the organic matter content of topsoils (0 - 200 mm) from commercial farms practising dryland agriculture in the summer rainfall area of South Africa (24°-30°S; 24°-30°E). The... -
Effek van bewerkingstyd op die afname van totale swawel in geselekteerde Suid-Afrikaanse gronde
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement Grondkunde, Republiek van Suid-Afrika'n Afname van 4–70% in die totale S van bogronde as gevolg van bewerking het die vraag laat ontstaan hoe hierdie verlies verband hou met die periode van bewerking en of so 'n verwantskap tussen ekotope verskil. Bewerkte en nabygeleë... -
The effect of grazing frequency and intensity on the root development of Lolium perenne L. under subtropical conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.R. Mckenzie --- Department of Grassland Science, Republic of South AfricaThe root organic matter (OM) per unit volume of soil of Lolium perenne L. (perennial ryegrass) was evaluated over two years under subtropical conditions. Root OM was measured on five separate occasions in four soil-depth categories (0–50, 50–100, 100–200 and... -
Fosfor in geselekteerde onversteurde en bewerkte Suid-Afrikaanse gronde 1. Totale, anorganiese en organiese fosfor
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. van Zyl --- Departement Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement Grondkunde, Republiek van Suid-AfrikaMin is bekend oor die effek van boerderypraktyke soos bewerking, bemesting en bekalking op die fosforfraksies in gronde van die somerreënvalgebied (25°-30°S; 24°–30°O) in Suid-Afrika. Die doelstellings van die studie was om die effek van gewasverbouing op die totale (Pt),... -
Changes in the organic matter and nutrient contents of some South African irrigated soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.C. du Preez --- Department of Soil Science, Republic of South Africa G.H. Wiltshire --- Department of Soil Science, Republic of South AfricaCultivation caused, without exception, a decline in the organic matter content of dryland soils in the central regions of South Africa. The question arose as to how cultivation affects the organic matter content of irrigated soils from these regions. The... -
Changes in inorganic and organic Phosphorus in soil under maize (Zea mays) cultivation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.G. du Preez --- , Republic of South Africa A.S. Claassens --- Department of Plant Production and Soil Science, Republic of South AfricaThe changes in applied and residual phosphorus (P) were examined in Avalon and Clovelly soils under cultivation by using the P fractionation method of Hedley, Stewart and Chauhan (1982). Soil P was separated into six major fractions of which some... -
Stimulation and suppression of mineralisation and nitrification in incubated soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Agrella --- Department of Plant Production and Soil Science, South Africa P. Boeckx --- Department of Applied Analytical and Physical Chemistry, Belgium A.S. Claassens --- Department of Plant Production and Soil Science, South Africa O. Van Cleemput --- Department of Applied Analytical and Physical Chemistry, BelgiumPriming, induced through the addition of oxidisable organic matter, releases or immobilises nitrogen and other nutrients in the soil. Moisture plays a very important role in priming as it stimulates microbial activity after a dry soil is wetted, especially with... -
The measurement of low organic matter contents in soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.J. Rowell --- Agricultural Laboratory, Ministry of Agriculture, Water and Rural Development, Namibia M.E. Coetzee --- Agricultural Laboratory, Ministry of Agriculture, Water and Rural Development, NamibiaFour methods were compared to measure the small amounts of organic matter present in many Namibian soils and to detect organic amendments added to improve fertility. Two Walkley-Black wet oxidation methods involving titration (WBT-C) and colourimetry (WBC-C) and two loss... -
Nitrogen fertilizer guidelines for small-scale farming on an irrigated duplex soil based on soil analyses
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. J.J. Schmidt --- , South Africa F.G. Adriaanse --- , South AfricaReported nitrogen fertilizer research results were inadequate to meet the needs of small-scale farmers in the Bushbuck Ridge area. The objectives of this study were to establish inorganic N optima for maize production and to calibrate soil responses to N... -
Changes in inorganic phosphorus following incubation of some Zambian soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Kumoyo --- Department of Soil Science, Zambia O.A. Yerokun --- Department of Soil Science, Zambia M.I. Damaseke --- , ZambiaPhosphorus (P) deficiency is a major problem of many Zambian soils and annual applications of the recommended 60 kg P2O5 ha−1 (26 kg−1 ha−1) do not seem to reverse this trend. In order to better understand the dynamics of P... -
Acidity/Al aspects in soils of the Lusikisiki area, Eastern Cape Province
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Bühmann --- , D.J. Beukes --- , D.P. Turner --- ,Soil acidity related parameters like pH, extractable and soil organic matter bound Al, amorphous Al phases and Al substitutions in secondary iron minerals were determined on 57 samples from 15 representative soil profiles from the Lusikisiki area. The pH (H2O)... -
Plant nutrient status of soils of the Lusikisiki area, Eastern Cape Province
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Bühmann --- , D.J. Beukes --- , D.P. Turner --- ,The aim of the paper is to Identify major soil plant fertility constraints for 15 soil profiles from the Lusikisiki area of the Eastern Cape Province of South Africa. Phosphorus levels were very low, with 87% of the A horizons... -
Relationship between inorganic soil nitrogen and maize grain yield with controlled traffic practices
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. J.J. Schmidt --- , South Africa S.A. Smalberger --- , South Africa S.A. Smalberger --- , South Africa F.G. Adriaanse --- , South Africa C.C. du Preez --- , South AfricaTraditional N fertilizer guidelines were based on relationships between N application rates and yield response. These relationships varied greatly according to residual inorganic N content in the soil. The objective of this study was to establish inorganic N threshold values... -
The effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 1. Soil nitrogen dynamics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe dynamics of soil inorganic-N in reaction to a single, strategic application of fertiliser N were studied during the period 2000 to 2002 in an Oakleaf soil with a clay content increasing from 10 to 30.8% with depth. Soil inorganic-N... -
The effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 4. Selected nutritive characteristics and mineral content
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe influence of a single application of fertiliser N (0, 50, 100 and 150 kg N ha−1) applied in either autumn, early winter, late winter, early spring or late spring on selected nutritive and mineral parameters of a perennial ryegrass-white... -
Influence of long-term wheat residue management on organic matter in an Avalon soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E. Kotzé --- Department of Soil, Crop and Climate Sciences, Republic of South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, Republic of South AfricaThis study was initiated to determine the influence of different wheat residue management practices, that were sustained for about 20 years, on the organic matter content of an Avalon soil in a long-term trial near Bethlehem in the Eastern Free... -
Soil aggregate properties and total available water as affected by sugar cane (Saccharum hybrid sp.) production in Mauritius
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.R. Ng Cheong --- , Mauritius K.F. Ng Kee Kwong --- , Mauritius C.c. Du Preez --- Department of Soil, Crop and Climate Sciences, South AfricaConcerns within the sugar industry of Mauritius with respect to soil degradation caused by sugar cane cropping have led to a study on soil quality. As part of this study, the effects of sugar cane production, i.e. cropping and adoption... -
Particulate organic matter, soil texture and mineralogy relations in some Eastern Cape ecotopes in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AD Nciizah --- Department of Agronomy, South Africa IIC Wakindiki --- Department of Agronomy, South AfricaContrasting reports have been given on the relationships between soil texture, mineralogy and particulate organic matter (POM). The objective of this study was to determine the effects of soil texture and mineralogy on aggregate POM in several ecotopes in the... -
Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 1. Mineral nutrition
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: John Wooldridge --- Soil and Water Science, South Africa Johan Fourie --- Soil and Water Science, South Africa Marlise E Joubert --- Soil and Water Science, South AfricaEffects on soil, leaf and fruit element concentrations of organic (compost, straw mulch and hand weeding) and integrated (inorganic fertilisers and herbicide usage; IP) soil surface management practices in the tree rows, in combination with weed covers, cover crops and... -
Effects of soil surface management practices on soil and tree parameters in a ‘Cripps Pink’/M7 apple orchard 2. Tree performance and root distribution
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: John Wooldridge --- Soil and Water Science, South Africa Johan Fourie --- Soil and Water Science, South Africa Marlise E Joubert --- Soil and Water Science, South AfricaEffects of integrated production (IP) and organic-acceptable soil surface management practices were investigated in a ‘Cripps Pink’/M7 apple orchard in the Elgin area, South Africa. Work row treatments included cover crops, weeds and straw mulch. In the IP tree rows,... -
DECOMPOSITION IN ESTUARINE ECOSYSTEMS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: MH Schleyer --- , South AfricaThe varied sources of estuarine plant detritus and the processes and organisms involved in its decomposition are discussed in this review. In the case of emergent and peripheral vegetation, microbial decomposition commences in the phylloplane, with fairly rapid leaching of... -
Pitfalls in the Presentation of Chemical Data
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: J.A. Day --- Zoology Dept, South AfricaBiologists in the aquatic sciences are often guilty of numerous errors in the presentation of their chemical data. This paper reviews the use of units in the representation of the inorganic constituents of aquatic solutions for their benefit. It explains... -
FLUX OF INORGANIC NUTRIENTS AND PARTICULATE CARBON BETWEEN A SPARTINA MARITIMA SALT MARSH AND THE SWARTKOPS ESTUARY, EASTERN CAPE
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: D. Baird --- Department of Zoology, South Africa P. E.D. Winter --- Department of Zoology, South AfricaThe flux of dissolved inorganic nutrients (NH4-N, NO2-N, NO3-N, SRP) and suspended particulates (particulate organic carbon POC, and particulate inorganic carbon PIC) was measured across the mouth of a small creek draining a portion of the intertidal Spartina salt marsh... -
CHANGES IN THE BENTHIC FAUNA OF LAKE CHIVERO, ZIMBABWE, OVER THIRTY YEARS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B.E. Marshall --- Department of Biological Sciences, ZimbabweLake Chivero is a eutrophic Zimbabwean reservoir and data on its benthic fauna are available over a period of about thirty years. The levels of organic carbon are higher than in many other southern African reservoirs but have not increased... -
Fire and the dynamics of a semi-arid grassland: influence on soil characteristics
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: H A SnymanThe short-term impact of fire burning with the wind (head fire) and against the wind (back fire) on soil characteristics (soil-water content, soil compaction, soil temperature, organic matter, pH, exchangeable Ca, Mg, K, Na and extractable P) were determined in... -
Effect of Balanites glabra canopy cover on grass production, organic matter and soil moisture in a southern Kenyan rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: VO Wasonga RK Ngugi DM Nyariki G Kironchi TJ NjokaA study was undertaken in Kenya's southern savanna rangelands to determine the seasonal effect of Balanites glabra canopy cover on aboveground grass biomass, grass species composition, soil organic matter and soil moisture content. The study was conducted during the period... -
The influence of nitrogen and defoliation on digestibility and fibre content of Lolium multiflorum cv. Midmar
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JF Theron HA SnymanThe influence of different N fertiliser application levels (0, 150, 300 and 450kg N ha–1) in combination with different defoliation intervals (every 2, 4, 6 and 8 weeks and twice a season) on the digestibility and fibre component of ryegrass... -
Effect of three grazing intensities on selected soil properties in semi‐arid west Texas
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: E.M. Seitlheko --- Department of Agronomy, United States of America B.L. Allen --- Department of Agronomy, United States of America D.B. Wester --- Department of Agronomy, United States of AmericaSoils in the study, carried out in the Texas Trans‐Pecos region, were fine‐loamy, mixed, thermic Aridic Calciustolls; fine‐loamy, mixed, thermic Aridic Ustochrepts; and fine, mixed, thermic Typic Chromusterts. Our primary objective was to determine the effect of three grazing intensities... -
Research note: The influence of applied nitrogen on the root development of Lolium perenne L. one year after establishment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F.R. Mckenzie --- Department of Grassland Science, Republic of South Africa C.D. Morris --- , Republic of South AfricaThe effect of different levels of applied nitrogen (N) (ranging from 120–720 kg N ha−1 a−1) on the root development of perennial ryegrass (Lolium perenne L.) was examined at the end of the establishment year. Increasing levels of applied N... -
Soil characteristics under legume and non-legume tree canopies in signalgrass (Brachiaria decumbens) pastures
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jose CB Dubeux --- North Florida Research and Education Center, USA Mario de Andrade Lira --- Instituto Agronômico de Pernambuco (IPA), Brazil Mercia V Ferreira dos Santos --- Zootecnia, Brazil Jim Muir --- Borlaug Institute, South Africa Monica A da Silva --- Zootecnia, Brazil Vicente I Teixeira --- Zootecnia, Brazil Alexandre C Leão de Mello --- Zootecnia, BrazilTree canopies can change soil environments. Our study looked at soils 10%, 50%, 100% and 150% the distance from tree trunk to canopy edge of leguminous sabiá (Mimosa caesalpiniifolia Benth.) and espinheiro (Machaerium aculeatum Raddi) and non-legume cajueiro (Anacardium occidentale... -
The influence of downstream changes in water quality on phytoplankton composition in the Vaal River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Sanet Janse van Vuuren AJH PieterseLinks between spatial differences in phytoplankton composition and changes in environmental variables in the Vaal River, South Africa, were investigated. Multivariate analysis showed that the most important environmental variables influencing algal abundance were turbidity, conductivity, nutrient concentrations and temperature. Of... -
Nature of suspended particulate matter and concentrations of heavy metals in sediment in the southern part of Lake Victoria, East Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JF Machiwa --- Department of Aquatic Environment and Conservation, TanzaniaThe concentrations of metals in bottom sediment in the Tanzanian waters of Lake Victoria and the nature of suspended particulate matter (SPM) were analysed. The objective of the study was to compare levels of metals in sediment from different locations... -
An overview of the structure and function of microbial biofilms, with special emphasis on heterotrophic aquatic microbial communities
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AW Muia --- Department of Biological Sciences, Kenya G Bretschko --- , Austria GJ Herndl --- Department of Biological Oceanography, The NetherlandsAn overview is presented of the formation, structure and development of biofilms, and of the roles and functions of heterotrophic microbial communities in streambeds, in order to stimulate interest and research in this field in Africa. Microbial biolfilms are of... -
Site and stand analysis for growth prediction of Eucalyptus grandis on the Zululand coastal plain
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: M. du Plessis --- , J Zwolinski --- ,The integration of site information with that of tree growth is of special importance in Zululand, where sustainable supply of timber is essential for local processing and export commitments. Site prediction growth models need to be based on easily attainable... -
Vermicompost leachate improves seedling emergence and vigour of aged seeds of commercially grown Eucalyptus species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: LS Kandari --- Research Centre for Plant Growth and Development, School of Biological and Conservation Sciences, South Africa MG Kulkarni --- Research Centre for Plant Growth and Development, School of Biological and Conservation Sciences, South Africa J van Staden --- Research Centre for Plant Growth and Development, School of Biological and Conservation Sciences, South AfricaVermicompost leachate (VCL) is a liquid generated by earthworms and microorganisms during the conversion of organic matter into vermicompost. Vermicompost leachate is rich in nutrients and believed to contain both known and unknown plant growth substances, which are beneficial to... -
Mangrove litter production and organic carbon pools in the Mngazana Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Anusha Rajkaran JanineB AdamsWood harvesting is reducing the density of adult mangrove trees in the Mngazana Estuary. This is expected to decrease the amount of litter produced as well as the availability of organic carbon to the estuary and the nearshore environment. Pools... -
The impact of feedlot effluent on water quality and aquatic macroinvertebrate community structure in streams of the upper Vaal River catchment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M-N Jonker --- Centre for Aquatic Research, Department of Zoology, South Africa JHJ van Vuren --- Centre for Aquatic Research, Department of Zoology, South Africa V Wepener --- Centre for Aquatic Research, Department of Zoology, South AfricaThe impact of three intensive feedlots on aquatic macroinvertebrate community structure under high and low flows in the upper Vaal catchment was investigated. Water quality variables recorded upstream and downstream of feedlot activity include pH, dissolved oxygen, conductivity, temperature, turbidity,... -
Evidence of carbon transport between shelf and slope waters in the Benguela upwelling system
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: S Swart HN Waldron L HutchingsThe world ocean is pivotal in the global carbon cycle and, subsequent to anthropogenic loading of the atmosphere with CO2, its ability to sequestrate photosynthetically-fixed carbon is important with respect to our ability to predict climate change. A study of... -
Chemical composition and in vitro ruminal fermentation of selected grasses in the semiarid savannas of Swaziland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S Tefera V Mlambo BJ Dlamini AM Dlamini KDN Koralagama FL MouldLittle is known about the grass species type, composition and nutritive value in the semiarid savannas that sustain most of Swaziland's cattle population through the seven-month-long dry season. This study was conducted to investigate the nutritional characteristics of grasses collected... -
Mineralisation of organic fertilisers used by urban farmers in Harare and their effects on maize (Zea mays L.) biomass production and uptake of nutrients and heavy metals
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Armwell Shumba --- Department of Soil Science and Agricultural Engineering, Zimbabwe Ronald Marumbi --- Department of Soil Science and Agricultural Engineering, Zimbabwe Blessing Nyamasoka --- Department of Soil Science and Agricultural Engineering, Zimbabwe Phillip Nyamugafata --- Department of Soil Science and Agricultural Engineering, Zimbabwe Justice Nyamangara --- Matopos Research Station, Zimbabwe Simon Madyiwa --- Department of Soil Science and Agricultural Engineering, ZimbabweNutrient release patterns and heavy metal contamination risks associated with animal manure and organic municipal wastes used as basal fertilisers are largely unknown in Zimbabwe. Carbon, nitrogen and phosphorus mineralisation patterns were determined in a 56-day incubation experiment of domestic... -
Relationship between soil alteration index three (AI3), soil organic matter and tree performance in a ‘Cripps Pink’/M7 apple orchard
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: André H Meyer --- Agricultural Research Council–Infruitec-Nietvoorbij, South Africa John Wooldridge --- Agricultural Research Council–Infruitec-Nietvoorbij, South Africa Joanna F Dames --- Department of Biochemistry and Microbiology, South AfricaAlteration index three (AI3), which calculates the balances between three microbially-secreted enzymes, potentially enables differences between soils due to contrasting management practices to be quantified in relative terms. The ability of AI3 to distinguish between apple orchard soils under conventional... -
Changes in density and composition of algal assemblages in certain unit processes of two South African water purification plants
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MGJ Oosthuizen --- Unit for Environmental Sciences and Management, South Africa S Janse van Vuuren --- Unit for Environmental Sciences and Management, South AfricaThe water purification plants at Virginia and Bothaville, South Africa, experience problems with cyanobacteria and other algae. Their algal assemblages were studied during 2010 and 2011 to determine the dominant species that may pose problems in purification. Cyanobacteria, diatoms and... -
The effects of organic and conventional management practices on feeding activity of soil organisms in vineyards
Item type: Journal Article • Journal: African Zoology • Authors: A. J. Reinecke --- Department of Botany and Zoology, South Africa R. M. C. Albertus --- Department of Botany and Zoology, South Africa S. A. Reinecke --- Department of Botany and Zoology, South Africa O. Larink --- Technical University, GermanyThis study investigated whether the activity of soil organisms in a vineyard soil in the Western Cape, South Africa, was affected differently by different management practices. The influences of organic and conventional treatments were compared in two vineyard blocks, one... -
Forage yield and quality response of annual ryegrass (Lolium multiflorum) to different water and nitrogen levels
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Amanuel B Abraha --- Department of Plant Production and Soil Science, South Africa Wayne F Truter --- Department of Plant Production and Soil Science, South Africa John G Annandale --- Department of Plant Production and Soil Science, South Africa Melake K Fessehazion --- Department of Plant Production and Soil Science, South AfricaWater and nitrogen shortages in annual ryegrass (Lolium multiflorum) production can be improved by using proper irrigation and nitrogen scheduling methods. The aim of this research was to analyse the effect of water and nitrogen application on dry matter production... -
Comparison of biochemical compounds and antioxidant activities in date palm bunch fading disorder
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mahmood Izadi --- Department of Horticultural Science, College of Agriculture, Iran Ali Reza Shahsavar --- Department of Horticultural Science, College of Agriculture, IranDate palm bunch fading disorder, the cause of which remains unknown, is among the most harmful disorders affecting date production. In this study the contents of several biochemical compounds and antioxidant enzyme activity were measured in both faded and non-faded... -
Relationship between plant growth and organic acid exudates from ectomycorrhizal and non-ectomycorrhizal Pinus patula
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Rasheed Adeleke --- Department of Microbiology and Plant Pathology, South Africa T Eugene Cloete --- Department of Microbiology and Plant Pathology, South Africa Annick Bertrand --- Soil and Crops Research and Development Centre, Canada Damase P Khasa --- Centre for Forest Research and Institute of Integrative and Systems Biology, CanadaPlant–mycorrhizal interaction is an important association in the ecosystem with significant impacts on the physical, biological and chemical properties of the soil. In the present study, potential relationships that exist between organic acid production by ectomycorrhizal pine seedlings and plant... -
Assessing the potential benefits of organic and mineral fertiliser combinations on legume productivity under smallholder management in Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Grace Kanonge --- Chemistry and Soils Research Institute, Zimbabwe Florence Mtambanengwe --- Soil Fertility Consortium for Southern Africa (SOFECSA), Department of Soil Science and Agricultural Engineering, Zimbabwe Muneta G Manzeke --- Soil Fertility Consortium for Southern Africa (SOFECSA), Department of Soil Science and Agricultural Engineering, Zimbabwe Hatirarami Nezomba --- Soil Fertility Consortium for Southern Africa (SOFECSA), Department of Soil Science and Agricultural Engineering, Zimbabwe Paul Mapfumo --- Soil Fertility Consortium for Southern Africa (SOFECSA), Department of Soil Science and Agricultural Engineering, ZimbabweProductivity of grain legumes on sandy soils of southern Africa is critically limited by marginal fertilisation. Effects of co-applying phosphorus (P)-based mineral fertilisers and organic nutrient resources to cowpea (Vigna unguiculata (L.) Walp.) and soyabean (Glycine max L.) were investigated... -
The value of six key soil variables for incorporation into a South African forest site classification system
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Josua H Louw --- School of Natural Resource Management, South AfricaThe intensive nature of management practices in the exotic monoculture plantations of South Africa requires reliable decision support systems. Recent socio-economic developments, the need for optimal forest productivity, as well as increasing awareness of broader ecosystem values and environmental risks,... -
Soil carbon dioxide effluxes from different vegetation environments in semi-arid Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Rebecca Zengeni --- Soil Sciences Department, South Africa Vincent Kakembo --- Department of Geosciences, South Africa Nsalambi Nkongolo --- Centre of Excellence for Geospatial Information Science, USAThough important, CO2 effluxes from non-agricultural ecosystems are poorly characterised. Given that thicket vegetation is prevalent in Eastern Cape, South Africa, we monitored soil CO2 effluxes from an intact thicket, degraded thicket (DT) and grassland (G) over 10 months, as... -
Riverine dominance of a nearshore marine demersal food web: evidence from stable isotope and C/N ratio analysis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AM de Lecea --- School of Life Sciences, University of KwaZulu-Natal, South Africa AJ Smit --- School of Life Sciences, University of KwaZulu-Natal, South Africa ST Fennessy --- Oceanographic Research Institute, South AfricaThe Thukela Bank, KwaZulu-Natal, supports a diverse ecosystem and South Africa’s only prawn fishery. Oceanographic studies suggest riverine input is not important for the biology of this system, whereas biological studies suggest the contrary, with prawn catches increasing with increased... -
Subfossil diatoms from Hann Park pond, Dakar, Senegal: floristic inventory and palaeoenvironmental reconstruction
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: I Badiane --- Département de Géologie, Faculté des Sciences et Techniques, E Sow --- Département de Géologie, Faculté des Sciences et Techniques, CAK Fofana --- Département de Géologie, Faculté des Sciences et Techniques, C Aw --- Département de Géologie, Faculté des Sciences et Techniques,Diatoms in a 100 cm-long core from a pond in Hann Forest Park, western Senegal, were studied with the aim of reconstituting this interdune depression’s history, particularly the human influence, during the last century. Sixty-three species and varieties of diatoms... -
Health assessment of freshwater fish species from Albasini Dam, outside a DDT-sprayed area in Limpopo province, South Africa: a preliminary study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: UMC Nibamureke --- Department of Zoology, South Africa IEJ Barnhoorn --- Department of Zoology, South Africa GM Wagenaar --- Department of Zoology, South AfricaDuring 2006 to 2008, the water, sediment and fish in Albasini Dam, used as a reference site outside a DDT-sprayed area, had been found to be as affected as those in the nearby DDT-sprayed area were. Accordingly, the aim of... -
Variations on soil carbon dioxide flux with land-use type and selected soil properties in the hardveld of Botswana
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Oagile Dikinya --- Department of Environmental Science, Botswana Julius Atlhopheng --- Department of Environmental Science, Botswana Trust Manyiwa --- Department of Environmental Science, BotswanaThe dynamics of carbon dioxide (CO2) flux in the hardveld regions of Botswana are poorly understood, with previous studies having concentrated on sandveld and pan environments. In particular, soil organic carbon (SOC) has a positive influence on CO2 emissions to... -
Contribution of forest floor fractions to carbon storage and abundance patterns of arbuscular mycorrhizal fungal colonisation in a tropical montane forest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: V Jeyanny --- Forest Plantation Programme, Malaysia MH Ahmad Husni --- Faculty of Agriculture, Malaysia B Siva Kumar --- Faculty of Agriculture, Malaysia K Wan Rasidah --- Forest Plantation Programme, Malaysia WC Suhaimi --- Forest Plantation Programme, MalaysiaForest floor carbon stocks, which include different components of litter, hemic and sapric materials, have not been empirically quantified in tropical montane forest, although they influence soil carbon (C) pools. To date, the contribution of arbuscular mycorrhizae in C sequestration... -
The effects of conservation tillage practices and fertiliser management on soil structural properties at an experimental farm
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Danie Beukes --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Corrie Swanepoel --- Agricultural Research Council–Institute for Soil, Climate and Water, South AfricaCrop rotation and reduced tillage under conservation agriculture (CA) practices may induce higher soil organic carbon (SOC) and nitrogen (N) levels compared with conventional (Con) tillage practices. Soil organic carbon may increase soil aggregate stability (AS). The study site was... -
Improved usefulness of continental soil databases for agricultural management through local adaptation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mats Söderström --- International Center for Tropical Agriculture (CIAT), Kenya Kristin Piikki --- International Center for Tropical Agriculture (CIAT), Kenya Jeremy Cordingley --- Crop Nutrition Laboratory Services Ltd, KenyaThe usefulness of a continental digital soil map (AfSoilGrids250) was investigated at two levels relevant for agricultural fertiliser recommendations in Rwanda (point locations and administrative sector unit averages). Analysis of 900 soil samples for pH and soil organic carbon (SOC)... -
Generation Y's attitude towards organic wine
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Inkje Hoekstra --- Stenden University of Applied Sciences, The Netherlands Conrad Lashley --- Hospitality Studies, Stenden University of Applied Sciences, The Netherlands Elena Cavagnaro --- Sustainability in Hospitality & Tourism, Stenden University of Applied Sciences, The NetherlandsThis research paper focuses on the motives behind Generation Y's wine choices. Data collection was done by reviewing relevant literature, interviewing wine experts and organising blind and open wine tastings accompanied by questionnaires and focus group discussions. Results confirm that... -
Comparison of soil properties under tropical Acacia hybrid plantation and shifting cultivation land use in northern Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Trieu Thai Hung --- Tasmanian Institute of Agriculture and School of Land and Food, Australia Richard Doyle --- Tasmanian Institute of Agriculture and School of Land and Food, Australia Alieta Eyles --- Tasmanian Institute of Agriculture and School of Land and Food, Australia Caroline Mohammed --- Tasmanian Institute of Agriculture and School of Land and Food, AustraliaDespite the common use of Acacia species in Vietnam, few studies have examined changes to total soil nitrogen (TN) and total soil carbon (TC) following the planting of Acacia mangium × Acacia auriculiformis (Acacia hybrid) plantations (AH) on formerly eroded... -
Inorganic nitrogen application improves the yield and yield traits of common bean (Phaseolus vulgaris L.) irrespective of the indigenous rhizobial population
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Anteneh Argaw --- School of Natural Resources Management and Environmental Sciences, Ethiopia Daniel Muleta --- Holleta Agricultural research Center, EthiopiaThe effect of number and efficiency of indigenous rhizobia on the need for external inorganic nitrogen (N) application to boost common bean production is unknown. Hence, field experiments were conducted at four locations with soil populations of <100, 100–1 000... -
Perceptions on organic farming and selected organic fertilizers by subsistence farmers in Ga-Rankuwa, Pretoria, South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: L. L. Mugivhisa --- Department of Biology, South Africa J. O. Olowoyo --- Department of Biology, South Africa D. Mzimba --- Department of Biology, South AfricaOrganic farming, which is a form of alternative or sustainable agriculture, makes a major contribution to the improvement of food security globally through recycling of natural resources. This study assessed 60 subsistence farmers’ perceptions of organic farming. Descriptive statistical analyses... -
Development of a charcoal-fuelled dryer for the production of organic fertilizer from hog waste
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: B.O. Akinnuli --- Department of Mechanical Engineering, Nigeria O.P. Bodunde --- Department of Mechanical Engineering, NigeriaThe negligence of livestock farmers regarding waste disposal and inadequate waste control facilities are becoming a serious health and environmental hazard. In this study, a charcoal-fuelled dryer was developed to eliminate the moisture content in hog waste for easy conversion... -
Improvement of spatial modelling of crop suitability using a new digital soil map of Tanzania
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kristin Piikki --- International Center for Tropical Agriculture (CIAT), Kenya Leigh Winowiecki --- World Agroforestry Centre (ICRAF), Kenya Tor-Gunnar Vågen --- World Agroforestry Centre (ICRAF), Kenya Julian Ramirez-Villegas --- International Center for Tropical Agriculture (CIAT), Colombia Mats Söderström --- International Center for Tropical Agriculture (CIAT), KenyaClimate change is projected to have widespread impacts on the climate suitability and geographical distribution of agricultural crops. Simulations were conducted on the suitability of common beans (Phaseolus vulgaris L.) in Tanzania under progressive climate change, taking into account a... -
Impact of seasonal nitrogen fertilisation on production characteristics of a mixed grass pasture in the Western Cape province of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Carien Bester --- Department of Agronomy, South Africa Johan Labuschagne --- Research and Technology Development Services, Department of Agriculture Western Cape, South Africa Petrus J Pieterse --- Department of Agronomy, South AfricaPasture production in the Western Cape has traditionally been based on temperate species producing the majority of fodder during spring and autumn after which dry matter production decreases in winter. To investigate seasonal fertiliser nitrogen (N) management strategies to optimise... -
Interaction of small-scale supplemental irrigation, sawah preparation intensity and soil amendment type on productivity of lowland sawah-rice system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: John C Nwite --- Department of Crop Production Technology, Nigeria Sunday E Obalum --- Department of Soil Science, Nigeria Charles A Igwe --- Department of Soil Science, Nigeria Toshiyuki Wakatsuki --- Faculty of Life and Environmental Sciences, JapanSole dependence on rainfall, poor water management and low soil fertility largely explain the fluctuations in agricultural productivity in West Africa. Lowlands for sawah-based rice farming often offer opportunities for small-scale supplemental irrigation but these are rarely explored and their... -
Yield, nutrient and heavy metal uptake of leafy vegetables grown in sewage sludge and poultry manure amended soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Blessing Nyamasoka --- Department of Soil Science and Agricultural Engineering, Zimbabwe Ronald Marumbi --- Department of Soil Science and Agricultural Engineering, Zimbabwe Armwell Shumba --- Department of Soil Science and Agricultural Engineering, Zimbabwe Phillip Nyamugafata --- Department of Soil Science and Agricultural Engineering, Zimbabwe Simon Madyiwa --- Department of Soil Science and Agricultural Engineering, Zimbabwe Justice Nyamangara --- Department of Environmental Science and Technology, ZimbabweUrban farmers in Harare grow vegetables in soils fertilised with poultry manure (PM) and sewage sludge (SS). Feed and storage management influence nutrient supply of these organic amendments. Nitrogen mineralisation of PM and SS were determined in a non-leaching and... -
PAHs, OCPs and PCBs in sediments from three catchments in Durban, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Vogt --- Unit for Environmental Sciences and Management, South Africa R Pieters --- Unit for Environmental Sciences and Management, South Africa BK Newman --- Coastal Systems Research Group, Council for Scientific and Industrial Research, South AfricaPolycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were analysed from sediment samples collected in 2012 from rivers, surface runoff canals and estuaries in three highly urbanised catchments in durban, KwaZulu-Natal, South Africa. PAHs were ubiquitous, at... -
Effect of residue and fertiliser management on soil fertility in a long-term sugarcane trial in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sandile Mthimkhulu --- South African Sugarcane Research Institute, South Africa Neil Miles --- South African Sugarcane Research Institute, South Africa Rianto van Antwerpen --- South African Sugarcane Research Institute, South Africa Dimpho Elephant --- South African Sugarcane Research Institute, South AfricaUnderstanding the impact of long-term continuous addition of sugarcane residues and fertiliser on soil fertility is important for development of best management practices. The experiment commenced in 1939. The fertility of the 0–10 cm soil layer was affected by the... -
Sensitivity of selected chemical and biological soil quality parameters to tillage and rotational cover cropping at the Zanyokwe Irrigation Scheme, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Arnold N Njaimwe --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Pearson NS Mnkeni --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Pardon Muchaonyerwa --- School of Agricultural, Earth and Environmental Sciences, South Africa Cornelius Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Isaiah IC Wakindiki --- Department of Agronomy, Faculty of Science and Agriculture, South AfricaSustainable management of soils requires knowledge of the impact of agronomic practices such as tillage and crop rotation on soil quality. The objective of this study was to identify soil chemical and biological soil attributes with high sensitivity to tillage... -
Population fluctuations of Cerithidea decollata (Gastropoda: Potamididae) in mangrove habitats of the St Lucia Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JL Raw --- , South Africa GM Rishworth --- , South Africa R Perissinotto --- , South Africa JB Adams --- , South AfricaMangrove macrobenthos species are used as ecological indicators as they are sensitive to changes in sediment properties. In this study, the population density of the common mangrove whelk Cerithidea decollata was assessed during different environmental conditions in the St Lucia... -
Relationship between carbon stocks and tree species diversity in a humid Guinean savanna landscape in northern Sierra Leone
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Edward Amara --- Earth Change Observation Laboratory, Department of Geosciences and Geography, Finland Janne Heiskanen --- Earth Change Observation Laboratory, Department of Geosciences and Geography, Finland Ermias Aynekulu --- World Agroforestry Centre (ICRAF), Kenya Petri KE Pellikka --- Earth Change Observation Laboratory, Department of Geosciences and Geography, FinlandGlobal sustainable development goals include reducing greenhouse gas emissions from land-use change and maintaining biodiversity. Many studies have examined carbon stocks and tree species diversity, but few have studied the humid Guinean savanna ecosystem. This study focuses on a humid... -
Nutrient fluxes from sediments pose management challenges for the Knysna Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LRD Human --- South African Environmental Observation Network, Elwandle Coastal Node, South Africa R Weitz --- Department of Botany, Institute for Coastal and Marine Research, South Africa BR Allanson --- Knysna Basin Project, Department of Zoology and Entomology, South Africa JB Adams --- Department of Botany, Institute for Coastal and Marine Research, South AfricaThis study investigated seasonal dynamics of benthic nutrient fluxes using in situ benthic chambers deployed over a 24–hour period at the sediment water interface for four distinct regions of the Knysna Estuary. The sediment in the Upper Estuary, Lagoon and... -
Soil organic carbon in agricultural systems of six countries in East Africa – a literature review of status and carbon sequestration potential
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S Namirembe --- Stepup Standard Ltd., Uganda K Piikki --- Swedish University of Agricultural Sciences (SLU), Sweden R Sommer --- WWF Deutschland, Agriculture & Land Use Change, Germany M Söderström --- Swedish University of Agricultural Sciences (SLU), Sweden B Tessema --- Ethiopian Institute of Agricultural Research (EIAR), Ethiopia SS Nyawira --- International Center for Tropical Agriculture (CIAT), KenyaCropland soils are considered to have the potential to sequester atmospheric CO2 through agronomic best management practices (BMPs). To estimate this potential in East Africa, the authors reviewed 69 published studies from Ethiopia, Kenya, Rwanda, Tanzania, Uganda, and Burundi assessing... -
Effects of long-term grazed crop and pasture systems under no-till on organic matter fractions and selected quality parameters of soil in the Overberg, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jacques DV Smith --- Department of Soil Science, South Africa Johann A Strauss --- Western Cape Department of Agriculture, South Africa Ailsa G Hardie --- Department of Soil Science, South AfricaThere is limited soil research on semi-arid, grazed no-till crop and pasture systems. The long-term (10 years) effect of three grazed no-till dryland crop and pasture rotation systems, and perennial lucerne pasture were assessed on soil carbon (C) and nitrogen... -
Response of soil organic matter indices and fractions after 37 years of wheat production management practices in semi-arid South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T Motema --- , South Africa E Kotzé --- , South Africa PF Loke --- , South Africa CC du Preez --- , South AfricaThe current study evaluated the long-term response of soil organic matter (SOM) indices and fractions on wheat production management practices in the semi-arid region of South Africa. The treatments included three tillage methods (no-tillage, stubble mulch and ploughing), two residue... -
Soil β-glucosidase activity, organic carbon and nutrients in plant tissue in response to cover crop species and management practices
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Adewole T Adetunji --- , South Africa Bongani Ncube --- , South Africa Andre H Meyer --- , South Africa Reckson Mulidzi --- , South Africa Francis B Lewu --- , South AfricaCover crop (CC) management can be improved to enhance carbon storage, microbial activity and fertility in agricultural soils. This study assessed the immediate effect of living CCs and residues, two termination stages (vegetative and flowering) and two termination methods (slash... -
Effect of nitrogen fertilisation during the cool season on daily growth rate, botanical composition and selected nutritive characteristics of a mixed grass-clover pasture in the Winelands sub-region of the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johan Labuschagne --- , South Africa Carien Bester --- , South Africa Petrus J Pieterse --- , South AfricaNitrogen effects the productivity, botanical composition and quality of grass-clover pastures. Responses to N fertilisation are area and season specific and must be quantified to ensure optimal economical pasture production. A grass-clover pasture mixture was established under irrigation at Elsenburg... -
Spatio-temporal typology of the physico-chemical parameters of a large North African river: the Moulouya and its main tributaries (Morocco)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Taybi Abdelkhaleq Fouzi --- , Morocco Mabrouki Youness --- , Morocco Legssyer Bouchra --- , Morocco Berrahou Ali --- , MoroccoThe physico-chemical parameters of surface water from the largest Maghrebian river flowing into the Mediterranean Sea, the Moulouya River, show a large variability in space and time, under the influence of natural and anthropogenic phenomena. This study was conducted between... -
A characterisation of wetland soil types on the Maputaland Coastal Plain
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: ML Pretorius --- , CW van Huyssteen --- , LR Brown --- , AT Grundling --- , CT Downs --- ,This paper addresses the shortage of wetland soil data on the Maputaland Coastal Plain. It does so by investigating the relationship between wetland types, slope position and soil properties. Four wetland types (a valley-bottom system, perched pans, hygrophilous grasslands and... -
Mixed-species plantations of Eucalyptus and Acacia mangium increase labile carbon and phosphorus levels in Ferralsol soils in the Cerrado biome, Brazil
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Wilbert Valkinir Cabreira --- , Brazil Marcos Gervasio Pereira --- , Brazil Fabiano de Carvalho Balieiro --- , Brazil Eduardo da Silva Matos --- , Brazil Renato de Aragão Ribeiro Rodrigues --- , Brazil Raissa Nascimento dos Santos --- , BrazilIn order to clarify the effect of mixed planting in the dynamics of phosporus (P), we assessed the fractions of this element in mixed plantings of Eucalyptus urophylla × E. grandis (Urograndis) and Acacia mangium in a tropical soil clay,... -
Diet of the mullets Planiliza macrolepis and Moolgarda cunnesius in the Mfolozi-Msunduzi Estuary, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W Qwabe --- , South Africa DP Cyrus --- , South AfricaThe mullet species, Planiliza macrolepis and Moolgarda cunnesius, were collected seasonally from Mfolozi-Msunduzi Estuary on the east coast of South Africa in order to determine their diet. The gut contents of 178 fish with standard length (SL) ranging between 100... -
Long-term wheat production management effects on soil fertility indicators in the semi-arid eastern Free State, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Palo Francis Loke --- , South Africa Johannes Jacobus Schimper --- , South Africa Elmarie Kotzé --- , South Africa Christiaan Cornelius du Preez --- , South AfricaThis study evaluated temporal effects of wheat production management practices on soil fertility under semi-arid conditions. Treatments applied for 37 years included straw management (unburned and burned), tillage practices (no-tillage, stubble mulch, and mouldboard ploughing) and weed control methods (chemical... -
A comparison of zinc sources and extraction methods on sandy soils suitable for maize cropping
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: CF Wessels --- , South Africa LF van Straaten --- , South Africa CC du Preez --- , South Africa GM Ceronio --- , South AfricaMaize is the most important crop produced for human and animal nourishment in South Africa. The crop is susceptible to zinc (Zn) deficiencies, which result in lower grain yields with poorer nutritional value. Knowledge of the nature and behaviour of... -
The distribution of dinoflagellate cyst assemblages in recent sediments of the Oualidia Lagoon, Morocco, with a focus on toxic species
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Chaira --- , Morocco H Rhinane --- , Morocco B Ennaffah --- , Morocco S Maimouni --- , Morocco R Sagou --- , Morocco S Loulad --- , Morocco A BenMhamed --- , Morocco A Agouzouk --- , Morocco S BenBrahim --- , Morocco E Masseret --- , France M Laabir --- , FranceHarmful algal blooms (HABs) are becoming widely distributed and more frequent, threatening socioecosystems and human health. We determined species composition, abundance and spatial distribution of dinoflagellate cysts in the upper sediment of the Oualidia Lagoon located on the Atlantic coast... -
Soil C sequestration and CO2 fluxes under maize-based Conservation Agriculture systems in the Eastern Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lindah Muzangwa --- , South Africa Pearson Nyari Stephano Mnkeni --- , Tanzania Cornelius Chiduza --- , South AfricaTraditional farming methods deplete soil carbon and contribute to carbon dioxide (CO2) emissions. We investigated the effects of Conservation Agriculture principles on C sequestration and CO2 flux from two agroecological regions in the Eastern Cape province, South Africa, over five... -
A history of Conservation Agriculture in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: JA Strauss --- , South Africa PA Swanepoel --- , South Africa H Smith --- , South Africa EH Smit --- , South AfricaConservation Agriculture (CA) is a holistic farming system aimed at the conservation of natural resources by halting soil erosion and increasing biodiversity in cropping systems, while still effecting sustainable production. Conservation agriculture is based on three principles, namely minimum soil... -
Comparison of three soil health indicators between different vegetative strip compositions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Robyn Nicolay --- , South Africa Simon Jeffery --- , United Kingdom Nicola Randall --- , United KingdomContemporary evidence shows biotic factors play a prominent role in the soil health and the provision of soil functions. Herbaceous grassland species differ in their modulation of soil communities, effects on soil components, as well the processes they interact with... -
Soil quality index for extensive pastures in hilly landforms region of highly weathered soils in an Atlantic forest biome, Brazil
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: DL Burak --- , Brazil E de C Monteiro --- , Brazil RR Passos --- , Brazil E de Sá Mendonça --- , BrazilExtensive pasture systems established in highly weathered tropical soils on steep slopes are vulnerable to soil degradation. Soil degradation can be monitored using an soil quality index (SQI). The SQI can assess both environmental aspects and indices related to pasture... -
Adoption of organic fertilizer for cocoa production in Ghana: Perceptions and determinants
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Anthoinette Avane --- , Ghana Bismark Amfo --- , Ghana Robert Aidoo --- , Ghana James Osei Mensah --- , GhanaThis study assesses perceptions, determinants, and constraints of ‘Asaasenufosuo’ organic fertilizer adoption by cocoa farmers in Ghana. Primary data were sourced from 200 cocoa farmers. Perception index, Cragg’s double hurdle model, and Kendall’s coefficient of concordance were employed. In addition... -
Is application of commercial potassium humates beneficial to soil and wheat?
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: GM Ceronio --- , South Africa JT van Tonder --- , South Africa CC du Preez --- , South AfricaCommercial humates manufactured from oxidised lignites are often recommended to improve soil condition and crop growth. The benefits ascribed to these products are questioned, since they differ from humates that exist naturally in soils. Growth chamber, glasshouse and field experiments... -
Effect of biochar, farmyard manure, and lime on soil properties, and on growth and nutrient uptake of wheat on acidic soils in Southern Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mekedes Lulu --- , Ethiopia Bekele Lemma --- , Ethiopia Legesse Hidoto --- , Ethiopia Asmare Melese --- , EthiopiaThis study assessed the effect of the interactions of biochar (BC), farmyard manure (FYM) and lime on soil chemical properties, and on different wheat attributes in Southern Ethiopia. The experimental design was a randomised complete block in three replications. The... -
Long-term experimental data and crop modelling to inform the ecological intensification of irrigated wheat production in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S Magwaza --- University of Pretoria, South Africa M van der Laan --- University of Pretoria, South Africa D Marais --- University of Pretoria, South AfricaWheat (Triticum aestivum L.) production is threatened by climate change and the decline in agricultural land available due to urbanisation, farmers switching to other crops, and environmental degradation. The aim of this study was to investigate the ecological intensification (EI)... -
Soil organic carbon stocks and properties are affected by plant cover types in an urban ecosystem in Colombia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Víctor Mondragón --- Universidad Nacional de, Colombia Sede Medellín Flavio Moreno Hurtado --- Universidad Nacional de, Colombia Sede Medellín Daniel Francisco Jaramillo Jaramillo --- Universidad Nacional de, Colombia Sede MedellínSoil organic carbon (SOC) is the main element in soil organic matter (SOM) and its storage or release into the atmosphere is sensitive to changes in land use. This study evaluated SOC storage and SOM quality in the Metropolitan Regional... -
Predicting soil carbon in granitic soils using Fourier-transform mid-infrared (FT-MIR) spectroscopy: the value of database disaggregation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kelebohile Rose Seboko --- University of the Free State, South Africa Johan van Tol --- University of the Free State, South Africa Elmarie Kotze --- University of the Free State, South AfricaSoil carbon (C) is an important component in quality assessments and efficient models are required to estimate C rapidly. Accurate C assessments are valuable in monitoring land-use changes. Fourier-transform mid-infrared (FT-MIR) spectroscopy has proved to be a powerful tool for... -
Effects of short-duration kraaling depend on initial conditions in a mesic grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Heidi-Jayne Hawkins --- , South Africa Nompendulo Mgwali --- , South Africa Susanne Vetter --- Rhodes University, South AfricaShort-duration overnight kraaling has been suggested as a tool for restoring degraded rangelands. However, the response of different plant functional types and communities to such intense livestock impact may vary depending on local context. We thus examined the effects of... -
Diversity of euglenoids in a drinking water source in Burkina Faso (West Africa): implications for sustainability and water quality
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Minata Ouattara --- University Joseph Ki-Zerbo, Burkina Faso Frédéric Zongo --- University Joseph Ki-Zerbo, Burkina Faso Bilassé Zongo --- University Joseph Ki-Zerbo, Burkina FasoEuglenophyta are a group of algae that occur in water polluted by organic matter, which makes them a good indicator for organic pollution. This study aimed to determine the diversity of Euglenophyta, the environmental conditions favourable to their development and... -
Evaluating the effects and benefits of cover crops in citrus orchards: a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sibongiseni Silwana --- ARC Infruitec-Nietvoorbij, South Africa Azwimbavhi Reckson Mulidzi --- ARC Infruitec-Nietvoorbij, South Africa Nebo Jovanovic --- University of the Western Cape, South AfricaCover crops are used in sustainable agricultural practices to improve soil quality and minimise the effect of climate change, water restrictions and drought. The South African citrus industry produces and exports a diverse range of citrus fruits; however, knowledge of... -
Effects of land use and site on organic carbon fractions in some humic soil profiles of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: --- School of Agricultural, South Africa --- School of Agricultural, South Africa --- School of Agricultural, South Africa --- School of Agricultural, South AfricaSoil organic matter (SOM) and its different carbon (C) fractions play a vital role in storing C and are a source of plant nutrients in natural and managed ecosystems. This study was conducted at six sites in KwaZulu-Natal Province to... -
Fire suppression interacts with soil acidity to maintain stable recalcitrant pyrogenic carbon fractions in South African mesic grasslands soil
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Robyn E Nicolay --- University of KwaZulu-Natal, South Africa Ntuthuko R Mkhize --- University of KwaZulu-Natal, South Africa Michelle J Tedder --- University of KwaZulu-Natal, South Africa Kevin P Kirkman --- University of KwaZulu-Natal, South AfricaGrassland ecosystems have evolved alongside fire, a fundamental element that shapes and sustains their ecological balance. Recent research indicates that carbon produced during pyrogenic events in fire-dependent ecosystems may occur in more recalcitrant forms within deeper soil horizons. Notably, refractory... -
Effects of eucalypt and black wattle biochars from vacuum pyrolysis on sandy soil quality and cauliflower yield
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S Mncedi --- Stellenbosch University, South Africa JF Görgens --- Stellenbosch University, South Africa PA Swanepoel --- Stellenbosch University, South Africa AG Hardie --- Stellenbosch University, South AfricaWoody invasive alien plants (IAPs), including black wattle (Acacia mearnsii De Wild.) and eucalypt species (Eucalyptus camaldulensis Dehnh.), present significant environmental challenges in South Africa. Biochar from these plants can enhance soil carbon sequestration and fertility. This study examines the... -
Changes in the macrobenthic community structure associated with finfish farming in Richards Bay Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: SF Nzama --- University of Zululand, South Africa L Vivier --- University of Zululand, South Africa A De Fortier --- University of Zululand, South AfricaGlobally, aquaculture has shown the potential to boost economic activity and enhance food security. However, controversy exists around large-scale finfish farming, with objections centred around potential environmental issues (especially eutrophication). Given this, the effects of a trial dusky kob (Argyrosomus... -
Population growth of Daphnia magna cultured in manure-fertilised water under laboratory conditions
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Adamneh Dagne --- Ethiopian Institute of Agricultural Research (EIAR), National Fishery and other Aquatic Life Research Center, Ethiopia Getacher Beyene --- Ethiopian Institute of Agricultural Research (EIAR), National Fishery and other Aquatic Life Research Center, Ethiopia Alemayehu Wubie --- Ethiopian Institute of Agricultural Research (EIAR), National Fishery and other Aquatic Life Research Center, EthiopiaIn developing countries, mass production of Daphnia magna, used as a food in freshwater aquaculture, is a challenge. A fifteen-day laboratory experiment was conducted to examine the population growth and reproductive parameters for D. magna reared in green water fertilised... -
A Portuguese urban vegetable garden under the gaze of hospitality
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Cynthia Luderer --- Social Sciences Institute, University of Minho, PortugalThis work concerns an urban vegetable garden in the north-west of Portugal and aims to describe the hospitality surrounding this environment. This study resulted from a two-year field investigation, which was methodologically driven by ethnography and supported by the anthropology... -
Assessment of near-infrared reflectance spectroscopy for monitoring soil carbon, nitrogen and organic matter in South African forestry plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: DR Ramesar --- Institute for Commercial Forestry Research, South Africa DS Naidoo --- Institute for Commercial Forestry Research, South Africa GD Cooper --- Institute for Commercial Forestry Research, South Africa RJ Burgdorf --- Institute for Commercial Forestry Research, South AfricaSoil organic matter, carbon and nitrogen contribute to soil quality, which influences plant growth. In forestry planta- tions soil carbon, nitrogen and organic matter significantly influence site productivity. In South Africa, plantation forestry occurs across a diverse landscape requiring assessment... -
Model and measure: comparing soil organic carbon stocks quantification approaches at field scale in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Willie Herman Cloete --- North-West University, South Africa Gerhard du Preez --- North-West University, South Africa George Munnik van Zijl --- North-West University, South AfricaThere is an ongoing debate about the most appropriate approach for quantifying changes in soil organic carbon stocks (SOCS). The aim of the study was to evaluate the performance of the Rothamsted carbon (RothC) modelling approach against the re-measured SOCS...