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Groei en produksie van ‘n aanal aangeplante weidings onder beweiding
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.A. Pieterse --- Dept Plantproduksie, J.O. Grunow --- Dept Plantproduksie, N.F.G. Rethman --- Dept Plantproduksie,Die groei en produksie onder beweiding van ‘n aantal aangeplante weidings is met behulp van die verskilmetode bepaal. Uit die data verkry in die proef is dit duidelik dat indien daar besproeiingswater beskikbaar is, groen materiaal dwarsdeur die jaar voorsien... -
‘n Vergelyking van wei‐ en voergewasse vir die produksie van slaglammers in die Pretoria‐ Witwatersrand‐Vereeniging(PWV)‐gebied
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.A. Pieterse --- Departement Plantproduksie, Republiek van Suid‐Afrika J.O. Grunow --- Departement Plantproduksie, Republiek van Suid‐Afrika N.F.G. Rethman --- Departement Plantproduksie, Republiek van Suid‐Afrika W.A. van Niekerk --- Departement Veckunde, Republiek van Suid‐AfrikaA comparison of pasture and fodder crops for the production of slaughter lambs in the Pretoria‐Witwatersrand‐Vereeniging (PWV) area. A number of pasture and fodder species were evaluated for the production of mutton with weancr lambs. Animal performance and meat production... -
An analysis of the ET/Ep-curve and its application irrigation scheduling
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.S. Burgers --- Department of Plant Production, P.C. Nel --- Department of Plant Production,The well known sigmoidel ET/Ep -curve often quoted in the literature for a variety of crops, merely depicts a smoothed curve drawn through points representing the average ET/Ep ratio for each depletion cycle co-ordinated with the middle day of the... -
Potato irrigation scheduling and straw mulching
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.S. Burgers --- Department of Plant Production, P.C. Nel --- Department of Plant Production,The effect of mulching and irrigation frequency on tuber yield was investigated during three seasons at the Glen Agricultural Research Institute The soil on the experimental site consisted of a loamy sand topsoil and sandy clay subsoil with 94 mm... -
Practical means of scheduling irrigation of maize using a programmable pocket calculator
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R. Mottram --- Summer Grain Sub-Centre, R. St. E. Clemence --- ,The irrigation scheduling model IRRISCHED-4, here described, enables the irrigator to choose one of four techniques for estimating crop water use, depending upon data available. Daily inputs include maximum and minimum temperatures, sunshine hours, leaf area index, crop factor, rain,... -
Vergelyking van ammoniumsulfaat, kalksteenammo- niumnitraat en ureum onder besproeiingstoestande op twee gronde van die Vaalhartsbesproeiingskema
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Snyman --- , R. du T. Burger --- Departement Grondkunde, M.C. Laker --- Departement Grondkunde,Op 'n sandgrond met 9% klei in die B21-horison het ammoniumsulfaat hoër koringopbrengste gelewer as kalksteenammoniumnitraat en ureum. 'n Sandleemgrond met 20% klei in die B21-horison, het geen verskille tussen stikstofbronne getoon nie. Logingstudies in grondkolomme het aangetoon dat feitlik... -
Effects of level and timing of irrigation on growth and water use of lucerne
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Beukes --- Department of Agriculture and Water Supply, S.A. Barnard --- Department of Agriculture and Water Supply,A six-year flood irrigation trial with lucerne (Medicago sativa cv. Karoo) was conducted on a sandy loam soil in the south-western part of the Cape Province at Oudtshoorn. Two cropping practices, whereby one or two forage cuttings are followed by... -
Invloed van bewerking en besproeiing op die verwering van gneis in die Augrabies-gebied
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.F. Eloff --- Departement van Landbou en Watervoorsiening, W. F.A. Kirsten --- Departement van Landbou en Watervoorsiening, B.L. Plath --- Departement van Landbou en Watervoorsiening,Fisiese, chemiese en mineralogiese kriteria is gebruik om te bepaal of veranderinge in eienskappe van gronde op gneise, in die Augrabies-gebied, as gevolg van bewerking en besproeiing plaasgevind het. Bewerking en besproeiing van die halfverweerde gneise het die verweringsproses versnel... -
Enkele faktore wat die vruggroei van sitrus beïnvloed
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. du Plessis --- , Republiek van Suid-Afrika H.M. du Plessis --- , Republiek van Suid-Afrika'n Ondersoek het aangetoon dat 'n hoogsbetekenisvolle (r = 0,96) verwantskap bestaan tussen waterverbruik van 'n volwasse sitrusboom en vruggroeitempo. Waterverbruik bereik 'n maksimum van 80–90 l/dag gedurende die periode Desember tot einde Maart, dit is dieselfde tyd wanneer vruggrootte... -
Response to inoculation of groundnuts grown under irrigation in soil containing indigenous rhizobia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B. Kishinevsky --- Division of Legume Inoculation, Agricultural Research Organization, The Volcani Center, Israel B.W. Strijdom --- , Republic of South Africa C.J. Otto --- , Republic of South Africa H.H. Lochner --- , Republic of South Africa M.M. Kriel --- , Republic of South AfricaFive strains of Bradyrhizobium spp. highly effective on groundnuts (Arachis hypogaea L.) were used to inoculate groundnuts grown under irrigation in each of two soils. Both soils contained small numbers of indigenous rhizobia capable of nodulating groundnuts. Root nodules typed... -
Changes in plant water relations of wheat and soybeans after relief of water stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sue Walker --- Department Land, Air and Water Resources, Veihmeyer Hall, U.S.A. D.M. Oosterhuis --- Department of Agronomy, U.S.A. Judy Eastham --- , Republic of South AfricaThe ability of a crop to recover from a mild or severe water stress and the rate of recovery are of importance for irrigation management and are also linked to the drought resistance and water use efficiency of the crop... -
Effect of soil nutritional status and irrigation on plant available water of wheat (Triticum aestivum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.G. Annandale --- Department of Plant Production, Republic of South Africa A.A. Nel --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South AfricaPlant available water (PAW) is the amount of water in the soil profile available for crop use. When irrigation management is based on a percentage depletion of PAW accurate estimates of PAW are essential and it is important that factors... -
Die invloed van plantpopulasie op opbrengs en kwaliteit van katoen (Gossypium hirsutum L.) in die Vaalharts- en Sandvetbesproeiingsgebiede
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.P. de Bruyn --- Landboufakulteit, Republiek van Suid-Afrika J. de Kock --- Departement Landbou en Watervoorsiening, Kleingraansentrum, Republiek van Suid-Afrika J.J. Human --- Landboufakulteit, Republiek van Suid-AfrikaDie invloed van plantdigtheid op die opbrengs en kwaliteit van katoen is vir die Vaalharts- en Sandvetbesproeiingsgebiede ondersoek. Aangesien hoër plantpopulasies hoër eise aan water- en stikstofvoorsiening stel, is hierdie effek by verskillende peile van besproeiing en stikstofbemesting uitgetoets. Individuele... -
Die effek van vertraging van besproeiing op die opbrengs en kwaliteit van katoen (Gossypium hirsutum L.) in die Vaalhartsbesproeiingsgebied
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. de Kock --- Landboufakulteit, Republiek van Suid-Afrika J.J. Human --- Landboufakulteit, Republiek van Suid-Afrika L.P. de Bruyn --- Landboufakulteit, Republiek van Suid-AfrikaAangesien dit reeds bekend is dat katoen tydens die eerste stadia van die groeiperiode minder gevoelig vir watertekorte is, is 'n proef oor drie seisoene op Vaalharts uitgelê waar die eerste besproeiing na opkom van die saailinge uitgestel is totdat... -
Quantifying leaf water potential for scheduling irrigation of wheat under specific soil-climate conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Nel --- , Republic of South Africa P.R. Berliner --- , IsraelThe relationship between soil water deficit (SWD), potential evapotranspiration (PET) and midday leaf water potential (LWP) of irrigated spring wheat was studied at Roodeplaat to determine if LWP can easily be estimated from SWD and PET so that it can... -
Use of estimated leaf water potential for irrigation timing of wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Nel --- , Republic of South Africa F.J. Dijkhuis --- , Republic of South AfricaA regression model with which the leaf water potential (LWP) of wheat can be estimated from soil water content and potential evapotranspiration was developed from data generated during 1986. This model was used during the 1988 wheat season to decide... -
Infestation and injury levels of stem borers in relation to yield potential of grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. van den Berg --- Summer Grain Centre, Republic of South Africa J. B.J. van Rensburg --- Summer Grain Centre, Republic of South AfricaThe infestation patterns of the stem borer species Busseola fusca (Fuller) and Chilo partellus (Swinhoe) and the effect on plant yield, tiller number, plant height, peduncle length and internal damage were determined under conditions of differential nitrogen fertilization and soil... -
Polymer effect on infiltration and erosion of sodic soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Gal --- , Republic of South Africa R. Stern --- , Republic of South Africa J. Levin --- , Republic of South Africa M. Ben-Hur --- , Republic of South AfricaRunoff from irrigated sodic soils is a common phenomenon in arid and semi-arid climates. The effect of a low-charge polysaccharide (LCCP) on infiltration rate (IR) and runoff on two red apedal soils was studied using an irrigation simulator. One was... -
Die invloed van verskillende waterregimes op Up-to-date aartappels I. Vegetatiewe ontwikkeling, fotosintesetempo en stomatadiffusieweerstand
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.M. Steyn --- , Republiek van Suid-Afrika H.F. du Plessis --- , Republiek van Suid-Afrika P.F. Nortjé --- , Republiek van Suid-AfrikaDrie grondwaterregimes (20, 50 en 70% onttrekking van plantbeskikbare water) is gedurende herfsaanplan- tings in 1987 en 1988 op Up-to-date aartappels toegepas om die invloed daarvan op groei en ontwikkeling te ondersoek. Twee fisiologiese parameters van plantwaterstremming, naamlik, fotosintesetempo en... -
Die invloed van verskillende waterregimes op Up-to-date aartappels II. Opbrengs, grootteverspreiding, kwaliteit en waterverbruik
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.M. Steyn --- , Republiek van Suid-Afrika H.F. du Plessis --- , Republiek van Suid-Afrika P.F. Nortjé --- , Republiek van Suid-AfrikaDrie besproeiingsbehandelings (20, 50 en 70% onttrekking van plantbeskikbare water) is toegepas ten einde die optimum peil van grondwateronttrekking by aartappels te bepaal. Die proef is gedurende die 1987 en 1988 herfsseisoene uitgevoer. Totale waterverbruik van behandelings is bereken en... -
Soil water use and rooting depth of Italian ryegrass (Lolium multiflorum Lam.) in a small plot experiment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.E. Steynberg --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South Africa N. F.G. Rethman --- Department of Plant Production, Republic of South AfricaItalian ryegrass is planted mainly under irrigation in the summer rainfall region of South Africa. Irrigation practices are often based on the assumption that Italian ryegrass has an extremely shallow root system. A small plot experiment was conducted to ascertain... -
Water use rate and crop factors of Italian ryegrass (Lolium multiflorum Lam.) under simulated grazing conditions in a small plot experiment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.E. Steynberg --- Department of Plant Production, Republic of South Africa P.C. Nel --- Department of Plant Production, Republic of South Africa N. F.G. Rethman --- Department of Plant Production, Republic of South AfricaNo species specific irrigation norms are available for pastures in South Africa. A small plot experiment was conducted to establish irrigation norms for Italian ryegrass. Potential evapotranspiration was calculated by the Penman-Monteith formula. Crop factors were determined as the ratio... -
Calibration and validation of the SWB model for sunflower (Helianthus annuus L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.Z. Jovanovic --- Department of Plant Production and Soil Science, Republic of South Africa J.G. Annandale --- Department of Plant Production and Soil Science, Republic of South Africa A.A. Nel --- , Republic of South AfricaThe Soil Water Balance (SWB) generic crop growth and irrigation scheduling model was used to simulate the crop growth and soil water balance of sunflower (Helianthus annuus L. c v. CAR 1199 and SO 306) grown at Rietrivier. The objectives... -
Evaluation of petiole nitrate measurement as an aid for N fertilization of potatoes (Solanum tuberosum L.) on sandy soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.P. Brink --- Department of Agronomy and Pastures, N. J.J. Combrink --- Department of Agronomy and Pastures, F.H. Knight --- Department of Agriculture, Western Cape,Potatoes are produced in the Sandveld of the Western Cape on soils with extremely low clay and organic material contents. A low nitrogen mineralisation potential and high leaching hazard complicate the management of the nitrogen supply to the plant. This... -
Calibration and validation of the SWB irrigation scheduling model for soybean [Glycine max. (L.) Merr., indeterminate cv. Wayne]
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.Z. Jovanovic --- Department of Plant Production and Soil Science, South Africa J.G. Annandale --- Department of Plant Production and Soil Science, South Africa A. T.P. Bennie --- Department of Soil Science, South AfricaSoil Water Balance (SWB) is a mechanistic, irrigation scheduling, generic crop model including a database of crop specific growth parameters. The objective of this study was to calibrate and validate this model for soybean [Glycine max. (L.) Merr., indeterminate cv... -
A field method to determine three dimensional infiltrability of vineyard soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.A. Myburgh --- , South Africa C.L. Howell --- , South Africa D. Brink --- , South AfricaA method is described to measure water intake from a small, shallow pond in which a 5 mm constant water head is maintained. Since water is supplied to the soil at near atmospheric pressure, infiltrability rather than infiltration rate is... -
Water balance simulation of a peach orchard using the SWB model
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. du Sautoy --- Dept. of Soil Science, Faculty of Agriculture, Republic of South Africa N.Z. Jovanovic --- Dept. of Plant Production and Soil Science, Republic of South Africa J.G. Annandale --- Dept. of Plant Production and Soil Science, Republic of South AfricaSoil Water Balance (SWB) is a user-friendly irrigation scheduling model developed to estimate water use for a wide range of crops. The FAO crop factor option within this model allows one to determine daily irrigation requirements from daily weather data... -
Possible flood irrigation technologies to reduce water use of Sultanina grapevines in a hot, arid climate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.A. Myburgh --- , South AfricaGrowth, production and water use efficiency of Sultanina grapevines irrigated by means of methods where only a fraction of the soil was wetted, were compared to full surface flood irrigation in the hot, arid Lower Orange River region of South... -
Determination of the timing and amount of irrigation of winter cover crops with the use of dielectric constant and capacitance soil water content profile methods
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.F. Gebregiorgis --- Soil-Plant-Atmosphere Continuum Research Unit, South Africa M.J. Savage --- Soil-Plant-Atmosphere Continuum Research Unit, South AfricaA well-managed irrigation scheduling system needs a rapid, precise, simple, cost-effective and non-destructive soil water sensor that allows for measurements at different depths and different locations across the cropped area. Two soil water content profile measurement methods were used and... -
Evapotranspiration of Vitis vinifera L. cvs Sunred Seedless and Muscat Supreme in response to soil water depletion and irrigation cutoff during berry ripening
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.A. Myburgh --- , South Africa C.L. Howell --- , South AfricaThe effects of soil water depletion and irrigation cutoff during ripening on yield, quality and evapotranspiration (ET) of table grapes were studied to refine irrigation strategies needed during hot, dry summers. Six irrigation treatments were applied to two cultivars, viz... -
Comparison between traditional and scientific irrigation scheduling practices for furrow irrigated potatoes (Solanum tuberosum L.) in Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: EB Geremew --- Department of Plant Production and Soil Science, South Africa JM Steyn --- Department of Plant Production and Soil Science, South Africa JG Annandale --- Department of Plant Production and Soil Science, South AfricaTraditional irrigation schemes constitute about 40% of the total irrigated land in Ethiopia. Despite this, the sector has been overlooked and not supported by improved water management technologies. A survey conducted on one of the schemes, Godino, indicated that farmers... -
Wheat (Triticum aestivum L.) growth and yield response to saline irrigation water under controlled conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.B. Dikgwatlhe --- , South Africa G.M. Ceronio --- , South Africa L.D. van Rensburg --- , South AfricaSerious agronomic problems occur where saline water is used for irrigation. The effect of irrigation water salinity on wheat was investigated using electrical conductivity (ECi, mS m−1) as a salinity indicator. A pot experiment was conducted at the University of... -
Advances in soil physics: Application in irrigation and dryland crop production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.D. van Rensburg --- Department of Soil, Crop and Climate Sciences, South AfricaThis is the third soil physics review to be published in South African Journal of Plant and Soil. In the previous reviews the focus was broad and covered almost every aspect of the subject, providing a comprehensive list of contributions... -
Modelling crop growth and crop water relations in South Africa: Past achievements and lessons for the future
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- , South Africa J.G. Annandale --- Department of Plant Production and Soil Science, South Africa J.M. De Jager --- Department of Soil, Crop and Climate Sciences, South Africa R.E. Schulze --- , South Africa N.G. Inman-Bamber --- , Australia W. Durand --- , South Africa L.D. Van Rensburg --- Department of Soil, Crop and Climate Sciences, South Africa P.S. Van Heerden --- , South Africa C.T. Crosby --- , South Africa G.C. Green --- , South Africa J.M. Steyn --- Department of Plant Production and Soil Science, South AfricaMathematical simulation of crop growth and water relations has become indispensable to agricultural science and practice. A critical assessment of how modelling has contributed to the development of crop science and to the management of crop production and natural resources... -
Effect of irrigation scheduling on leaf yield of non-heading Chinese cabbage
(Brassica rapa L. subsp. chinensis) Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. van Averbeke --- , C. Netshithuthuni --- ,A field experiment conducted on the Dzindi canal irrigation scheme in the north of South Africa demonstrated that non-heading Chinese cabbage (Brassica rapa L. subsp. chinensis) needed to be irrigated at least twice per week to maintain the water content... -
Photosynthetic capacity and diurnal gas exchange of ‘Brookfield Gala’ apple leaves under three irrigation systems
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T.C. Lebese --- Department of Horticultural Science, South Africa P.J.C. Stassen --- , South Africa S.J.E. Midgley --- Department of Horticultural Science, South AfricaWater and nutrient application using three irrigation systems, namely daily drip irrigation, pulsing drip irrigation and micro irrigation were studied with respect to photosynthetic efficiency, water use efficiency and leaf water relations in ‘Brookfield Gala’ apple trees during 2004/5 and... -
ON THE DISSOLVED SOLIDS OF THE PONGOLO FLOOD PLAIN PANS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J. Heeg --- Pongolo Research Group, C.M. Breen --- Pongolo Research Group, P.M. Colvin --- Pongolo Research Group, H.D. Furness --- Pongolo Research Group, C.F. Musil --- Pongolo Research Group,The water retained in the Pongolo flood plain pans differs from that of the Pongolo River not only in having a higher TDS, but also in the composition of the solutes, which approximate to seawater in their equivalent ionic proportions... -
HYDROCHEMISTRY OF THE UPPER ORANGE RIVER CATCHMENT
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: PC Keulder --- Department of Botany, South AfricaA four year pre-impoundment study of the catchment of the Hendrik Verwoerd Dam was conducted. The Orange River was the major source of dissolved chemicals and suspended sediments, while the Caledon River contributed 24 and 30% respectively, and the Kraai... -
The influence of nitrogen and defoliation on production and water‐use efficiency of Lolium multiflorum cv. Midmar
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.F. Theron --- Department of Agriculture, FSR‐E Unit, Republic of South Africa W.L.J. van Rensburg --- Department of Grassland Science, Republic of South AfricaThe objective of this study was to investigate the influence of different nitrogen fertiliser application levels in combination with different defoliation intervals on the dry matter (DM) production and water‐use efficiency of ryegrass (Lolium multiflorum,) cv. Midmar. In a field... -
Application of the 3-PG model to a Eucalyptus grandis stand subjected to varying levels of water and nutritional constraints in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J. M. Campion L.J. Esprey M.C. ScholesThe 3-PG model has shown considerable potential as a tool for predicting forest productivity. As part of a model validation exercise, 3-PG was applied to an irrigated and fertilised Eucalyptus grandis stand in the KwaZulu-Natal Midlands. Simulations were run over... -
Performance of simple irrigation scheduling calendars based on average weather data for annual ryegrass
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Melake K Fessehazion --- Plant Production and Soil Science, South Africa John G Annandale --- Plant Production and Soil Science, South Africa Colin S Everson --- Plant Production and Soil Science, South Africa Richard J Stirzaker --- Plant Production and Soil Science, South Africa Michael van der Laan --- Plant Production and Soil Science, South Africa Wayne F Truter --- Plant Production and Soil Science, South Africa Amanuel B Abraha --- Plant Production and Soil Science, South AfricaPoor irrigation management in pastures can lead to yield and quality reduction as well as loss of income through extra pumping and leaching of nitrate fertiliser. A number of irrigation scheduling techniques of varying levels of sophistication have been developed... -
Effects of irrigation water quality on vegetables Part 1: Yield and aesthetical appeal
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Loyiso L Mzini --- Döhne Agricultural Development Institute, South Africa Kevin Winter --- Department of Environmental and Geographical Sciences, South AfricaResearch on the use of greywater for irrigation has focused attention largely on greywater quality and biomass of the crop, but not on the quality of edible vegetable crops, whereas aesthetical appeal of the vegetables determines the acceptance in fresh... -
Effects of irrigation water quality on vegetables Part 2: Chemical and nutritional content
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Loyiso L Mzini --- Döhne Agricultural Development Institute, South Africa Kevin Winter --- Department of Environmental and Geographical Sciences, South AfricaThe internal qualities of edible vegetable crops have not been widely researched in South Africa. The aim of this study was to determine possible accumulation of nutrients and heavy metals within these crops after being irrigated with greywater (generated from... -
Small-scale rice irrigation technology in southern Ghana: the challenges for sustainable uptake
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Junji Koide --- Graduate School of Life and Environmental Sciences, Japan Misa Masuda --- Faculty of Life and Environmental Sciences, JapanPromotion of small-scale irrigation in rain-fed rice lowlands is reckoned a key strategy for filling the escalating gap between rice supply and demand in sub-Saharan Africa. Though studies acknowledged the farmer-centred nature of small-scale rice irrigation technology, along with its... -
Managing cultivated pastures for improving soil quality in South Africa: challenges and opportunities
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Department of Agronomy, South Africa Philip R Botha --- Directorate Plant Services, Western Cape Department of Agriculture, South Africa Chris C du Preez --- Soil, Crop and Climate Sciences, South Africa Hennie A Snyman --- Animal, Wildlife and Grassland Sciences, South Africa Johan Labuschagne --- Directorate Plant Sciences, Western Cape Department of Agriculture, South AfricaLoss of productive agricultural land due to soil degradation poses a serious threat to agricultural output and sustainability. Soil degradation of cultivated pastures manifests as a long-term decline in production potential. There are concerns that soils under pastures in certain... -
Chemical and thermal ocular burns: a review of causes, clinical features and management protocol
Item type: Journal Article • Journal: South African Family Practice • Authors: Khathutshelo Mashige --- School of Health Sciences, South AfricaChemical and thermal ocular burns are among the most urgent ophthalmic emergencies, often resulting in permanent damage, and in some cases, blindness. These burns are the result of exposure to chemicals or radiant energy (thermal or ultraviolet). The most serious... -
Field evaluation of deficit irrigation effects on tomato growth performance, water-use efficiency and control of parasitic nematode infection
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Osama Mohawesh --- Department of Plant Production, JordanTwo field experiments were conducted using a common tomato cultivar (GS12) to assess the effect of deficit irrigation (DI) regimes on tomato growth performance, and on root-knot nematode Meloidogyne javanica galling and abundance. Irrigation treatments consisted of five irrigation regimes:... -
Farmers’ perspectives on factors limiting tomato production and yields in Kabete, Kiambu County, Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: G. N. Karuku --- Department of LARMAT, Nairobi J. W. Kimenju --- Department of Plant Science and Crop Protection, Nairobi H. Verplancke --- Department of Soil Management and Soil Care, BelgiumA survey was carried out in Kabete, Central Kenya to establish the limitations and constraints experienced by farmers growing tomatoes. A structured questionnaire was prepared and tested in the field before the actual survey was carried out. Fifty farmers were... -
Diagnosing foliar nutrient dynamics of Eucalyptus grandis in KwaZulu-Natal, South Africa, using optimal element ratios and the diagnosis and recommendation integrated system (DRIS)
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: JM Campion MC ScholesFertilisation is one of the most cost-effective methods of increasing and maintaining the productivity of Eucalyptus grandis plantations in South Africa. This silvicultural practice can be optimised by using the foliar nutrient ratios measured in plants at maximum growth as... -
Productivity of non-heading Chinese cabbage (Brassica rapa subsp. chinensis) under different agronomic management factors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Innocent Maseko --- University of South Africa, South Africa Yacob G Beletse --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South Africa Noluyolo Nogemane --- University of South Africa, South Africa Christian P du Plooy --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South Africa Tatenda R Musimwa --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaProductivity of non-heading Chinese cabbage (Brassica rapa L. subsp. chinensis) was evaluated at Roodeplaat over two winter seasons (2012 and 2013). Agronomic factors considered were plant density, nitrogen level, irrigation frequency and planting date. Irrigating thrice or once a week... -
An irrigation control system with a web-based interface for the management of Eucalyptus planting stock in a nursery
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nkosinathi D Kaptein --- Institute for Commercial Forestry Research, South Africa Michael J Savage --- Soil-Plant-Atmosphere Continuum Research Unit, School of Agricultural, Earth and Environmental Sciences, South Africa Marnie E Light --- Institute for Commercial Forestry Research, South AfricaEfficient nursery irrigation is a key factor for the production of high-quality forestry planting stock. Conventional timer-based irrigation systems used by most forestry nurseries have some drawbacks that, if not properly managed, can lead to over-irrigation and water wastage, leaching... -
Review of anthropogenic threats and biodiversity assessment of an Ethiopian soda lake, Lake Abijata
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Wagaw --- Department of Biology, Ethiopia S Mengistou --- Department of Zoological Sciences, Ethiopia A Getahun --- Department of Zoological Sciences, EthiopiaThe intention of this review is to assess the impact of anthropogenic activities on the biodiversity of Lake Abijata. The lake was established as a National Park, together with Lakes Shalla and Chitu, to conserve water birds. It has high... -
Comparative assessment of technical efficiencies of irrigated crop production farms: A case study of the large-scale Kampe-Omi irrigation scheme, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bashir Adelodun --- , Daegu, Korea Abdulwaheed Adedayo Mohammed --- , Ilorin, Nigeria Kamoru Akanni Adeniran --- , Ilorin, Nigeria Sheu-Usman Oladipo Akanbi --- , Ilorin, Nigeria Taofeeq Sholagberu Abdulkadir --- , Ilorin, Nigeria Kyung Sook Choi --- , Daegu, KoreaThe technical inefficiencies of crop production system in terms of large-scale irrigation schemes are major problems attributed to the underperformance of crop farms. Therefore, the aim of this study was to estimate and compare farm-level technical efficiencies of four major... -
Response of malt barley grain quality characteristics to increasing irrigation water salinity
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: VN Mathinya --- , South Africa JH Barnard --- , South Africa ZA Bello --- , South Africa E van der Watt --- , South AfricaPremiums are offered for high quality grain, but producers of malting barley are often confronted with marginal soils and water scarcity. Irrigation water quality is often low, primarily due to high salt loads. This study determined the effect of irrigation... -
Challenges and opportunities for water conservation in irrigated agriculture in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Willem de Clercq --- , South Africa Marlene de Witt --- , South Africa Giel Laker --- , South AfricaThis review provides a brief overview of problems in irrigated agriculture that have become more evident as a result of climate change. In most irrigated regions in South Africa, the demand for water is exceeding the supply, as surface water... -
Response of tomato cultivars to irrigation management strategies employed by emerging farmers in the Greater Giyani Municipality
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Tebogo J Lebea --- , South Africa Nebo Jovanovic --- , South Africa Mapotso Kena --- , South Africa Kwabena K Ayisi --- , South Africa Wisani G Mushadu --- , South AfricaIntensification of low-tech agricultural production is required in the Greater Giyani Municipality (Limpopo province, South Africa) to respond to changing climatic conditions, water scarcity and increased food demand of the local market. Two years of field experiments were conducted on... -
Evaluation of furrow irrigation performance: Case of Kasinthula Cane Growers Scheme in Malawi
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Stanley Phiri --- , Malawi Thomas Nyanda Reuben --- , Malawi Grivin Chipula --- , Malawi Kenneth Alfred Wiyo --- , MalawiSurface irrigation is associated with low irrigation efficiencies and exerts a lot of pressure on water resources. Despite this, the irrigation method remains dominant in Malawi and other sub-Saharan Africa countries. A need exists to improve surface irrigation efficiencies in... -
Reducing poverty through use of irrigation: Evidence from rice farming in Benin
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gbetondji Melaine Armel Nonvide --- , BeninAn emerging body of literature has claimed that poverty is multidimensional and therefore the unidimensional measure cannot serve as a good proxy for poverty. The actual debate is about the inclusion of other dimensions in the poverty analysis framework. Regarding... -
Comparison of single vs composite soil electrical apparent conductivity-directed samples of irrigated soils for inorganic nitrogen estimation with electromagnetic induction sensors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: --- University of the Free State, South Africa --- University of the Free State, South Africa --- University of the Free State, South Africa --- University of the Free State, South AfricaThe management of soil can be improved by precision agriculture. A way to achieve this is by quantifying NH4+–N and NO3−–N in soil. The sampling of soil for quantifying these N species is a laborious task. Electromagnetic induction (EMI) sensors... -
Managing drought stress in wheat (Triticum aestivum L.) production: strategies and impacts
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maltase Mutanda --- University of South Africa, South Africa Hussein Shimelis --- School of Agricultural, South Africa Vincent Chaplot --- School of Agricultural, South Africa Sandiswa Figlan --- University of South Africa, South AfricaDrought stress is a major constraint to sustainable wheat production worldwide, including sub-Saharan Africa, where environmental and poor agronomic practices exacerbate the yield gap. Drought disrupts physiological, biochemical, and molescular processes, negatively impacting crop growth, grain yield and quality. This...