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Evidence of a germination inhibitor in senescent soybean pod walls
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Chapman --- , Republic of South AfricaWater based pod extracts of the pod wall material of four soybean cultivars were found to reduce the germination rate of mustard (Sinapis alba L.) seeds. Highly significant differences were also observed in this respect between the different pod extracts. -
The influence of photoperiod and temperature on the pre-flowering phase length of eleven soybean cultivars in northern Natal
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Chapman --- Agricultural Research Station,The effect of photoperiod and temperature on the pre-flowering phase length of 11 soybean cultivars was studied. Heat units (10 to 30°C) and night hours (sunset to sunrise) were used as measures of temperature and photoperiod respectively. Highly significant negative... -
Genotipe—omgewingsinteraksie by sojabone
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. E.M. Odendaal --- , Republiek van Suid-Afrika C.S. van Deventer --- Departement Genetika, Republiek van Suid-Afrika'n Gekombineerde variansie-ontleding is uitgevoer op die saadopbrengste en proteïenpersentasies van die saad van 14 sojaboonkultivars wat op nege verskillende lokaliteite oor 3 jaar geëvalueer is. Variansiekomponente geassosieer met elke bron van variasie is beraam. Die verkreë resultate en implikasies... -
Stomatal resistance measurement as an indicator of water deficit stress in wheat and soybeans
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.M. Oosterhuis --- Department of Agronomy, U.S.A. Sue Walker --- Department Land, Air and Water Resources, Veihmeyer Hall, U.S.A.The usefulness of stomatal response as an indicator of the onset and development of water stress was studied over five seasons in field-grown wheat (Triticum aestivum L.) and soybeans (Glycine max L. Merr.). With the onset of water stress, stomatal... -
Performance of five soybean cultivars in relation to lime and phosphorus levels on an acid Ultisol
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.D. Noble --- Department of Crop Science, Republic of South Africa J.D. Lea --- Department of Crop Science, Republic of South Africa M.V. Fey --- Department of Soil Science and Agrometeorology, Republic of South AfricaThe seed-yield response of five soybean cultivars (Hill, Geduld, Forrest, Welkom and Oribi) to applications of lime [Ca(OH)2] and P was evaluated over two seasons in the field on an acid soil of the Normandien series (Plinthic Paleudult). As a... -
Genotypic variation in leaf water potential of field-grown soybeans (Glycme max L. Merr.) and its association with dryland yield
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.F. Grant --- , Republic of South Africa J.D. Lea --- Department of Crop Science, Republic of South AfricaMaintenance of leaf water potential (ΨL) during periods of water stress may constitute an important drought-avoiding response. The identification of genotypic variation for this characteristic is, however, made difficult by the fact that comparative values for ΨL must be measured... -
Growth and nutrient content of soybeans in relation to solution calcium and aluminium
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.D. Noble --- Department of Crop Science, Republic of South Africa M.E. Sumner --- Department of Agronomy, United States of AmericaAluminium (Al) is a major component of most soils and is a limiting factor to sustained crop production in many regions. The amelioration of Al toxicity is of theoretical as well as practical interest in our understanding of mechanisms of... -
The influence of method of inoculation and certain herbicides on nodulation and seed yield of soybeans
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Greenfield --- Department of Agronomy, Republic of South AfricaField trials were conducted on soybeans (Glycine max (L.) Merr.) in a hot, dry environment under irrigation and a warm, moist environment on soils on which the crop had not previously been grown. The aim was to assess the effectiveness... -
The effect of bendioxide and 2,4-DB on the early growth and leaf development of three soybean (Glycine max (L.) Merr.) cultivars and the control of morning glory (Ipomoea purpurea (L.) Roth.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.L. Greenfield --- Department of Agronomy, Republic of South Africa M.R. Lagesse --- Department of Agronomy, Republic of South AfricaThree soybean (Glycine max (L.) Merr.) cultivars (Edgar, Duiker and Komati) were grown in pots together with morning glory (Ipomoea purpurea (L.) Roth.). Plants were exposed to three levels of bendioxide (0, 0.96 and 1.44 kg a.i. ha−1) in combination... -
Spatial variability of nitrate nitrogen in soil during the growing season of maize, cowpea and soybean
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Bloem --- Department of Agriculture, North West Province, Republic of South Africa R.O. Barnard --- Department of Plant Production and Soil Science, Republic of South AfricaThe nitrogen advantage of legumes in crop rotation systems is well known, but the nitrogen advantage from legumes to associated crops in an intercropping system is unclear. The objective of this study was to determine whether plant-available nitrogen is released... -
Effect of annual legumes on soil nitrogen and on the subsequent yield of maize and grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Bloem --- Department of Agriculture, Conservation and Environment, Republic of South Africa R.O. Barnard --- Department of Plant Production and Soil Science, Republic of South AfricaThe objective of this study was to quantify the nitrogen and yield advantage of cowpea, soybean and groundnuts to succeeding maize and grain sorghum crops. Treatments at six localities consisted of a crop rotation with annual legumes and maize or... -
First report of groundnut leafminer, Aproaerema modicella (Deventer) (Lepidoptera: Gelechiidae) on groundnut, soybean and lucerne in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. du Plessis --- , South AfricaThe groundnut leafminer, Aproaerema modicella is an important pest of groundnut and soybean in South and South-East Asia. It has also been reported from Uganda, Malawi and Mozambique. During 2000, it was first noticed on groundnut in South Africa. Since... -
Host suitability of South African and foreign soybean cultivars to Meloidogyne incognita race 2
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. Fourie --- , South Africa A.H. McDonald --- , South Africa D. De Waele --- laboratory of Tropical and Crop Improvement, BelgiumEighty-five local and foreign soybean (Glycine max (L.) Merr.) genotypes, including cultivars and breeding lines, were evaluated for host suitability to Meloidogyne incognita race 2 in two separate greenhouse experiments. In vivo reared M. incognita race 2 second-stage juveniles (J2)... -
Alternative hosts of Asian soybean rust (Phakopsora pachyrhizi) in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Nunkumar --- , South Africa P.M. Caldwell --- , South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaPhakopsora pachyrhizi Syd., the causal organism of Asian soybean rust (ASR) is an obligate parasite and cannot survive independently of its hosts or on debris. Thirteen legume species were tested for susceptibility to P. pachyrhizi. The abaxial leaf surface of... -
Development of Phakopsora pachyrhizi on soybean at controlled temperature, relative humidity and moisture periods
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Nunkumar --- , South Africa P.M. Caldwell --- , South Africa Z.A. Pretorius --- Department of Plant Sciences, South AfricaThe influence of temperature, relative humidity (RH) and moisture period (MP) was studied in relation to infection of soybean plants (Glycine max (L.) Merr.) by Asian Soybean Rust (ASR) caused by Phakopsora pachyrhizi Syd. Disease development was investigated at 15,... -
Comparative evaluation of commercial rhizobial inoculants of soybean
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Benice J Sivparsad --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Nyasha Chiuraise --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South Africa Mark D Laing --- Discipline of Plant Pathology, School of Agriculture, Earth and Environmental Sciences, College of Agriculture and Environmental Sciences, South AfricaInoculation of soybean seeds with root-nodule bacteria results in a significant increase in nodulation and yield. Two commercial rhizobial inoculants available on the South African market were tested for their efficacy under standardised conditions in a short-term greenhouse experiment. The... -
Improving productivity of orange-fleshed sweetpotato (Ipomoea batatas) through intercropping with legumes and moderate phosphorus application
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Eliah Munda --- International Potato Center, Mozambique Petrus J Pieterse --- Department of Agronomy, South Africa Maria I Andrade --- International Potato Center, Mozambique Godwill S Makunde --- International Potato Center, Mozambique Engil I Pereira --- School of Earth, Environmental, and Marine Sciences, USASweetpotato yield is adversely affected by poor soil fertility in Mozambique where access to inorganic fertilisers is lacking. The objective of the study was to evaluate the effectiveness of intercropping sweetpotato with groundnut and soybean at various phosphorus (P) fertilisation... -
A genetic study of pod shattering resistance in F2 soybean (Glycine max) germplasm
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Khuliso M Nevhudzholi --- , South Africa Eastonce T Gwata --- , South Africa Godwin RA Mchau --- , South AfricaSoybean is an important food legume. Promiscuous (tropical) soybean types which are compatible with indigenous soil rhizobia are desirable in crop production systems that are limited by inorganic nitrogenous fertilizers. However, the tropical soybean types are generally susceptible to pod... -
The effect of fishmeal replacement with terrestrial protein sources on growth, body condition and intestinal microbiota of juvenile dusky kob Argyrosomus japonicus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CLW Jones --- , South Africa A Nel --- , South Africa A Adesola --- , South Africa T Shipton --- , South Africa H Kaiser --- , South AfricaA balanced combination of protein sources to partially replace fishmeal in the diets of cultured carnivorous fish can promote optimal fish health and production performance. In the present study, the growth, body condition and gut microbiota of juvenile dusky kob... -
Influence of cropping sequences on labile carbon and phosphorus fractions in a wheat-based conservation agriculture system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: NZ Sosibo --- , South Africa E Dube --- , South Africa P Muchaonyerwa --- , South Africa TJ Tsilo --- , South AfricaWhile conservation agriculture (CA) has largely been successful in many areas, some reports suggest that certain farmers have not realised the benefits they had hoped for, especially in Africa. The benefits of CA could depend on the cropping sequences involved... -
Comparative benchmarking of fertiliser uses for oilseed crop production in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HT Ottermann --- , South Africa SJ Haarhoff --- Stellenbosch University, South Africa KJ Truter --- , South Africa F Meyer --- , South Africa D van der Westhuizen --- , South Africa PA Swanepoel --- Stellenbosch University, South AfricaThis study comparatively benchmarks fertiliser use over two periods (2013–2015; 2021–2023) in South Africa's oilseed crop production [soybean (Glycine max), canola (Brassica napus) and sunflower (Helianthus annuus)] against global trends, with a focus on major oilseed exporters. It explores fertiliser...