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Fertilizer requirements and production of Anthephora pubescens nees on a soil of the mangano series in the northern cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.H. Fourie --- Department of Agriculture and Water Supply, L.G. Du Pisani --- Department of Agriculture and Water Supply, C.H. Donaldson --- Department of Agriculture and Water Supply,The reaction of Anthephora pubescens to N, P and K fertilization was evaluated from 1976 to 1983. Dry matter production at N levels of 0; 75 and 150 kg/ha were 1,9; 2,2 and 2,3 ton/ha respectively. This relative poor reaction... -
Fisiologiese blaarabnormaliteite en bolopbrengs by katoen (Gossypium hirsutum L.) soos deur kalium-, kalsium- en boorvoeding beïnvloed
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. J.J. Combrink --- Navorsingsinstituut vir Tabak en Katoen,Physiological leaf abnormalities and boll yield of cotton (Gossypium hirsutum L.) as affected by potassium, calcium and boron nutrition. A pot trial with a sand medium and two levels each of K, Ca and B nutrition, factorially arranged, was carried... -
Potassium effects on stalk strength, premature death and lodging of maize (Zea mays L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maria Melis --- Summer Grain Sub-Centre, M. P.W. Farina --- Summer Grain Sub-Centre,In a field trial with maize, applications of potassium (K) proved to have a highly significant effect on stalk strength, premature death, root lodging and stalk breakage. A week prior to harvest the percentage of lodged plants varied from 77%... -
Invloed van bemesting op die oliekonsentrasie oliekwaliteit van sonneblomsaad
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.L. Loubser --- Olie- en Proteïensadesentrum, Departement Landbou en Watervoorsiening, C.L. Grimbeek --- Olie- en Proteïensadesentrum, Departement Landbou en Watervoorsiening,Influence of fertilization on the oil concentration and oil quality of sunflower seed. Fertilizer trials (N,P,K and lime) were conducted over two seasons at three localities. Results indicate that 150 kg N ha−1 fertilizer decreased the oil concentration of the... -
Effect of Ca, K and B supply on water-stress induced chlorophyll loss from tobacco and cotton leaf discs
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: ElizabethA. Davies --- , England N. J.J. Combrink --- , Republic of South AfricaA study was made of the influence of Ca:K ratios and B levels on the chlorophyll content of tobacco and cotton leaves grown under glasshouse conditions. Excised leaf discs were floated on a solution of polyethylene glycol 6000 to study... -
The accumulation of nitrate in Kikuyu grass (Pennisetum clandestinum Hochst)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.P. Marais --- Biochemistry Section, Republic of South Africa D.L. Figenschou --- Biochemistry Section, Republic of South Africa C. Dennison --- Department of Biochemistry, Republic of South AfricaA study was made of some of the factors responsible for the accumulation of excessive amounts of nitrate in certain Kikuyu pastures. Accumulation, mainly in stem tissue, is the nett result of several contributing processes. Climatic conditions causing a decline... -
Reproduktiewe opbrengskomponente van mielies (Zea mays L.) soos beïnvloed deur verskillende grondvrugbaarheids- en be- sproeiingspeile
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.E. Steynberg --- Departement Plantproduksie, Republiek van Suid-Afrika P.C. Nel --- Departement Plantproduksie, Republiek van Suid-Afrika P.S. Hammes --- Departement Plantproduksie, Republiek van Suid-AfrikaDie reproduktiewe opbrengskomponente van mielies (Zea mays L.) is gedurende die 1982/83-seisoen gemonitor by sekere behandelings van 'n langtermyn bemestings- en besproeiingsproef met twee peile elk van besproeiing (W), stikstof (N), fosfor (P), kallum (K) en kompos (M). Addisionele besproeiing... -
Effect of Ca, K and B supply on growth of cotton (Gossypium hirsutum L.) and tobacco (Nicotiana tabacum L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. J.J. Combrink --- , Republic of South Africa ElizabethA. Davies --- , EnglandThe effect of Ca:K ratios and B nutrition was investigated using tobacco and cotton grown in Mitcherlich pots with sand. A nutrient solution with three different ratios of Ca:K and two boron levels was used. Treatments were arranged factorially (3... -
Response of subterranean clover to liming and phosphate fertilization on a low potassium soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South Africa R.E. Harris --- , Republic of South AfricaSeveral Trifolium varieties grown in an acid Bokkeveld shale soil responded positively to small additions of lime and P. Growth was probably limited by a K deficiency, and it is unlikely that Trifolium species could be successfully grown as cover... -
Kaliumvaslegging in 'n Arcadia-grond: I. Vaslegging onder natuurlike toestande
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.J. Steenkamp --- , Republiek van Suid-Afrika A.A. Theron --- Departement Grand- en Waterboukunde, Republiek van Suid-Afrika J.A. de Bruyn --- Departement Plantkunde, Republiek van Suid-AfrikaTen einde die mate van kaliumvaslegging op 'n grand van die Arcadia-serie onder natuurlike toestande na te gaan, is grondmonsters van 'n reeks proefpersele geneem. Die persele het verskillende hoeveelhede kaliumbemesting oor 'n periode van 12 jaar ontvang. Die monsters... -
Factors affecting fruit quality and shelf life of Bon Chretien pears
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.J. van Zyl --- , Republic of South Africa J.M. Olivier --- Deciduous Fruit Board, Republic of South AfricaBon Chretien pears for canning and the fresh market are grown under various climatic conditions in South Africa. The major orchard factor affecting the shelf life of the fruit after storage seems to be the number of days between full-... -
Invloed van bemesting op sonneblomme. I. Saadopbrengs
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.L. Loubser --- , Republiek van Suid-Afrika C.L. Grimbeek --- , Republiek van Suid-Afrika Beulah Bronkhorst --- , Republiek van Suid-AfrikaBemestingsproewe is by drie lokaliteite oor vier seisoene uitgevoer deur 'n ongerepliseerde 43-gestrengelde faktoriaaluitleg te gebruik. Peile het gewissel van 0 tot 150 kg N ha−1, 0 tot 45 kg P ha−1, 0 tot 60 kg K ha−1 by twee... -
Die invloed van kalsium en magnesium op die groei van tabakplante en opname van kalium, kalsium en magnesium in waterkultuur
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.J. Steenkamp --- , Republiek van Suid-Afrika J.A. de Bruyn --- Departement Plantkunde, Republiek van Suid-Afrika A.A. Theron --- Departement Grond- en Waterboukunde, Republiek van Suid-Afrika'n Toename in the Ca-konsentrasie van 'n voedingsoplossing het 'n verhoging in biomassa tot gevolg gehad asook 'n verhoogde opname van K en Ca deur tabakplante. Die opname van Mg aan die anderkant word onderdruk deur toenemende konsentrasies van Ca... -
Drought sensitivity of maize (Zea mays L.) in relation to soil fertility and water stress during different growth stages
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 P.S. Hammes --- Department of Plant Production, Republic of South AfricaMaize was grown under controlled conditions in a pot experiment to determine how drought sensitivity would be affected by differential soil fertilities. Soil was obtained from a fertilization field trial where soil fertility differences developed over a period of 45... -
Kaliumvaslegging in 'n Arcadia-grond II. Vaslegging in die kleifraksie
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.J. Steenkamp --- , Republiek van Suid-Afrika A.A. Theron --- Departement Grond- en Waterboukunde, Republiek van Suid-Afrika J.A. de Bruyn --- Departement Botanie, Republiek van Suid-AfrikaOndersoek is ingestel na die invloed van relatief lae toedienings van kalium, asook drogingstemperatuur, op die vermoë van die kleifraksie van 'n Arcadia-grond, versadig met kalsium of magnesium, om kalium vas te lê. Die verskil in reaksie tussen die behandelings... -
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... -
The effect of lime, KCl and parent material on the cation exchange capacity of some acid subsoils of the western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South AfricaCation exchange capacity (CEC) values obtained by 22Na dilution for a number of mineralogically diverse acid subsoils reflected positive responses to lime and to treatment with KCl such that: CEC (unlimed, no KCl) < (unlimed + KCl) < (limed, no... -
Invloed van kaliumdraende bemestingstowwe op knolopbrengs en persentasie droëmateriaal van Solanum tuberosum L. knolle
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.G. Bester --- , Republiek van Suid-Afrika P. C.J. Maree --- Departement Akkerbou en Weiding, Republiek van Suid-AfrikaKNO3 het onder beheerde voedings en omgewingstoestande 'n hoër knolopbrengs as KCl en K2SO4 getoon. Alhoewel KCl 'n hoër knolopbrengs as K2SO4 gegee het, was dit net in 1985 oor alle cultivars (cv. BP1, Vanderplank, Up-to-date, Pimpernel) beduidend. KNO3 het... -
Effect of liming and parent material on the potassium quantity/intensity relationships of some upland soils of the western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South AfricaLiming and parent material had major effects on the potassium (K) quantity/intensity (Q/l) relationships of a varied group of naturally base-depleted upland soils of the western Cape. Departures from the usual Q/l curve form were observed, the individual curve sections... -
Invloed van bemesting op sonneblomme. II. N-, P- en K-verwydering deur die gewas
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.L. Loubser --- , Republiek van Suid-Afrika C.L. Grimbeek --- , Republiek van Suid-Afrika Beulah Bronkhorst --- , Republiek van Suid-AfrikaN-, P- en K-ontledings is gedoen op saad- en plantmonsters wat verkry is uit twee NPK bemestingsproewe en een N × P × kalkproef. Die resultate is gebruik om die N-, P- en K-verwydering deur verskillende plantdele te bereken. Daar... -
Concentration, accumulation and uptake rate of macro-nutrients by winter wheat under irrigation
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 A. T.P. Bennie --- Department of Soil Science, Republic of South AfricaThe objective of this study was to obtain information on the nutrient uptake patterns of winter wheat (Triticum aestivum L.) grown under normal irrigation farming conditions. Except for irrigation scheduling, 13 farmers were allowed to follow their normal farming practices... -
The potassium requirements of maize and soyabean on a high K-fixing soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: V. Kovačević --- Department of Crop Production, Yugoslavia V. Vukadinović --- Department of Crop Production, YugoslaviaSevere K nutritional problems in maize (Zea mays L.) and soyabean (Glycine max (L) Merr.) are common on the strongly K-fixing gleysols of east Croatia, Yugoslavia. There is, however, little information currently available regarding the K fertilizer requirements of these... -
Soil and plant potassium optima for maize on a kaolinitic clay soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. P.W. Farina --- , Republic of South Africa P. Channon --- , Republic of South Africa G.R. Thibaud --- , Republic of South Africa J.D. Phipson --- , Republic of South AfricaIn South Africa, there is an extreme paucity of information relating maize (Zea mays L.) yields to soil and plant K levels and most K fertilizer recommendations are highly subjective. Controversy also surrounds the practice of relating K fertilizer recommendations... -
An automated colorimetric method for the determination of dicyandiamide in 1.0 M KCI soil extracts
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.C. Pretorius --- , Republic of South Africa J.F. van Staden --- Department of Chemistry, Republic of South Africa A. D.P. Botha --- , Republic of South Africa C. Kolver --- , Republic of South AfricaThe nitrification inhibitor dicyandiamide (cyanoguanidine, didin or DCD) reacts with 1-naphthol and diacetyl to form a red complex which measures spectrophotometrically at 540 nm. An automated analytical procedure was developed to determine DCD in soils extracted with 1.0 M KCI... -
A comparison of methods used for the extraction of K in soils of the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.R. Thompson --- Department of Agricultural Development, Republic of South AfricaA number of common soil extractants, mainly those used for soil P, were used to extract K from a range of widely differing soils which occur in the Western Cape; the objective being to evaluate the simultaneous determination of P... -
The response of Italian ryegrass to sodium, lime and potassium on an acidic Natal soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.D. Manson --- , Republic of South AfricaUnless corrected, soil acidity and K deficiency frequently limit growth of intensive temperate pastures on highly weathered soils in South Africa. A field trial, with Italian ryegrass (cv. Midmar), was established on a Himeville sandy clay loam (typic Hapludox) for... -
Potassium nitrate and urea sprays affect flowering and yields of ‘Tommy Atkins’ (Mangifera indica) mango in Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Yeshitela --- Department of Plant Production and Soil Sciences, South Africa P.J. Robbertse --- Department of Plant Production and Soil Sciences, South Africa P. J.C. Stassen --- Department of Horticulture, South AfricaThe effects of leaf applications of potassium nitrate (KNO3), alone and in combination with urea at different concentrations on flowering, fruit set and fruit quality of Tommy Atkins' mango grown in the rift valley of Ethiopia were evaluated. The trees... -
Rind texture and juice acid content of Citrus spp. as affected by foliar sprays of mono-potassium phosphate (MKP), urea ammonium phosphate (UAP) and mono-ammonium phosphate (MAP)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.N. Mudau --- Department of Plant Production, Republic of South Africa K.I. Theron --- Department of Horticultural Science, Republic of South Africa E. Rabe --- Department of Horticultural Science, Republic of South AfricaRind coarseness of fruit of Citrus spp. is a general problem in the Citrusdal region of South Africa (Western Cape Province), often limiting the percentage of exportable fruit. Acid content of the juice of Citrus fruit is an important determinant... -
In-vitro inhibition of mycelial growth of several phytopathogenic fungi by soluble potassium silicate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T.F. Bekker --- Department of Plant Production and Soil Science, C. Kaiser --- Department of Plant Production and Soil Science, R. v.d. Merwe --- department of Microbiology and Plant Pathology, N. Labuschagne --- department of Microbiology and Plant Pathology,Soluble silicon has been reported to suppress some plant diseases, but in vitro inhibition of phytopathogenic fungi has not been demonstrated. In the current study in-vitro dose-responses towards soluble potassium silicate (20.7% SiO2) were determined for Phytophthora cinnamomi, Sclerotinia sclerotiorum,... -
Effects of potassium and early-season nitrogen applications on young ‘Keisie’ canning peach trees on a sandy, infertile soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , South AfricaThe effects of different rates of potassium (K) and early season nitrogen (SN) were investigated in a ‘Keisie’ canning peach orchard on a sandy, infertile soil, at 1111 trees ha−1, in the Western Cape Province, South Africa. Over the first... -
Effect of extending the early season potassium supply on young ‘Keisie’ canning peach trees on a sandy, infertile soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , South AfricaA field trial was carried out to investigate the effects of applying potassium (K), either in two equal parts at full bloom (FB) and 42 days after FB (2-way split); or as a 4-way split, commencing at FB, with three... -
Threshold values and sufficiency levels for potassium in maize producing sandy soils of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. van Biljon --- , Republic of South Africa D.S. Fouche --- , Republic of South Africa A.D.P. Botha --- , Republic of South AfricaSouth African maize farmers apply only two thirds of the potassium (K) which is annually removed in the grain, causing a deficit of more than 13 000 tons K per season. It is expected that these maize fields will gradually... -
Effects of sugar cane (Saccharum hybrid sp.) cropping on soil acidity and exchangeable base status 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 --- Department of Soil, Crop and Climate Sciences, South Africa C. C. Du Preez --- , MauritiusContinuous sugar cane cropping commonly leads to soil acidification. Such an effect can be attributed to N fertilization and to leaching and removal of exchangeable bases. A study was conducted on the five zonal soils of Mauritius to ascertain whether... -
The antifungal activity of potassium silicate and the role of pH against selected plant pathogenic fungi in vitro
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. F. Bekker --- Department of Plant Production and Soil Science, South Africa C. Kaiser --- , USA N. Labuschagne --- Department of Microbiology and Plant Pathology, South AfricaIn-vitro inhibition of mycelial growth of phytopathogenic fungi grown on potassium silicate amended media has been demonstrated. In the current study the respective effects on fungal growth of changes in the pH of growth medium with increased concentrations of potassium... -
Phosphorus application rate, and time after application, affect soil and leaf phosphorus concentrations in an upland Western Cape apple orchard
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , South AfricaThe effects of different rates of phosphorus (P) applied during soil preparation on leaf and soil P concentrations, and on leaf K, were investigated in a field trial in which Starking apple trees were grown on a limed, initially low-P... -
Overwintering beef animals on kikuyu (Pennisetum clandestinum) — its effect on animal performance and soil fertility
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: WD Gertenbach N Miles IB StewartA large proportion of the nutrients ingested by grazing animals are returned to the pasture in dung and urine. These by-products of animal digestion contain many ingredients necessary for plant growth, including nitrogen (N), phosphorus (P) and potassium (K). Disadvantages... -
Physical and chemical treatments for enhancing seed germination of Oldman saltbush (Atriplex nummularia)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MMW Abu-Zanat N SamarahThis study was conducted to improve the seed germination of Oldman saltbush (Atriplex nummularia), which is an important fodder shrub commonly used for revegetation of degraded rangelands in the West Asia and North Africa regions. Seeds with and without their... -
Soil fertility management in pasture small-plot trials: potential pitfalls
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N. Miles M.B. HardySmall-plot cutting trials are of particular importance in research relating to intensive pastures. Undetected changes in soil fertility during the course of experimentation may detract from the validity of results in trials of this kind. Information from field trials conducted... -
Responses of Eucalyptus species to fertilizer applications made at planting on granitic parent materials in the Mpumalanga and Northern Provinces of South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: ColleenA. Carlson --- , South Africa Ross Allan --- , South Africa Samuel Soko --- , South AfricaEarly research trials in South Africa have shown that Eucalyptus species generally respond positively to the addition of nutrients at planting. However, as most of these research trials were located in KwaZulu-Natal, it was important to investigate the nature ofthe... -
Effects of soil drenching of water-soluble potassium silicate on commercial avocado (Persea americana Mill.) orchard trees infected with Phytophthora cinnamomi Rands on root density, canopy health, induction and concentration of phenolic compounds
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Theo F Bekker --- Department of Applied Plant and Soil Sciences, South Africa Nico Labuschagne --- Department of Microbiology and Plant Pathology, South Africa Terry Aveling --- Department of Microbiology and Plant Pathology, South Africa Thierry Regnier --- Department of Microbiology and Plant Pathology, South Africa Clive Kaiser --- Department of Microbiology and Plant Pathology, South AfricaAvocado root rot, caused by Phytophthora cinnamomi Rands, remains a major constraint to avocado production worldwide. In the current study effects of successive soil drench applications of soluble potassium silicate on canopy health and root density of 13-year-old Persea americana... -
Potassium maldistribution revisited
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Justine Pietersen --- Department of Anaesthesiology and Critical Care, South Africa Andrew Levin --- Department of Anaesthesiology and Critical Care, South AfricaObjective: This study investigated the maldistribution of concentrated 15% potassium chloride after injection into one-litre, flexible, Ringer’s lactate bags. -
Effect of potassium and potting-bag size on foliar biomass and related attributes and oil composition of rose geranium (Pelargonium graveolens)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Zenzile P Khetsha --- Unit for Drug Discovery Research, Department of Agriculture, South Africa Moosa M Sedibe --- Unit for Drug Discovery Research, Department of Agriculture, South AfricaThis study was conducted to evaluate the effect of four concentrations of potassium (K; 1.3, 3.3, 5.3 and 7.3 mmol L−1) and two potting-bag sizes (5 and 10 L) on foliar biomass and related attributes and oil composition of rose... -
Enteropathogens associated with the seasonal fuctuations in plasma sodium and potassium levels in childhood diarrhoea
Item type: Journal Article • Journal: Southern African Journal of Epidemiology and Infection • Authors: V Pillay-van Wyk --- Burden of Disease Research Unit, G Swingler --- School of Child and Adolescent Health,This paper aims to assess the clinical, nutritional, microbiological, environmental and socio-economic determinants that have a seasonal distribution, or are potential confounders of a seasonal association of previously described seasonal fuctuations in plasma sodium and potassium concentrations in children with... -
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... -
Evaluation of five pre-emergence herbicides for volunteer potato (Solanum tuberosum L.) control
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: James Allemann --- Department of Soil, Crop and Climate Sciences, South AfricaVolunteer potatoes can cause significant weed problems in crops following potatoes as large numbers of potato tubers remain behind in the field after mechanical harvesting. These volunteer plants can create havoc with rotation programs and serve as a source of... -
Potassium fractions and availability for chickpea (Cicer arietinum) in Vertisols of north-west Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Yohannes Misskire --- Debre Markos University, Ethiopia Tekalign Mamo --- Center for Soil and Fertilizer Research in Africa, Morocco Abi M Taddesse --- Department of Chemistry, Ethiopia Uri Yermiyahu --- Gilat Research Center, Agricultural Research Organization, IsraelFor a critical appraisal of the supplying power of potassium (K) and to predict bioavailable K, it is necessary to have knowledge on the fractions of K and evaluate soil test methods for plant nutrition. This research aimed to assess... -
The beneficial effects of growth regulators on forage yield and quality of Amaranthus caudatus under different water stress conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Somayeh Farshbaf-Jafari --- , Iran Alireza Pirzad --- , Iran Mehdi Tajbakhsh --- , Iran Kazem Ghassemi-Golezani --- , IranIn order to improve crop productivity, farmers should have strategies for higher quantity and quality of forage without excessive inputs, like irrigation water. In order to assess forage quality of Amaranthus caudatus in response to irrigation levels (irrigation after 70,...