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The success of inland valley crop production in humid and subhumid areas of subSaharan Africa depends on the availability of appropriate crop varieties with some tolerance to excess moisture. Performance of upland crop associations [cassava (Manihot esculenta) + sweet potato (Ipomoea batatas) and...


Carsky, R.J.Walker, P.Hauser, S.Dashiell, Kenton E.Dixon, A.[Response of selected crop associations to groundwater table depth in an inland valley]Response of selected crop associations to groundwater table depth in an inland valley

Pod shattering in soybean is a major production constraint causing high field yield losses in the tropic and sub tropics. With regard to pod shattering, soybean varieties can be categorised as tolerant, intermediate or susceptible. Six soybean lines, Nam 2, TGx 1448-2E, Duiker, Nam 1, TGm 737P an...

L’éclatement de gousses de soja et la contrainte majeure à la production causant des pertes dans les tropiques et les sub-tropiques. Concernant l’éclatement de gousses, les variétés de soja peuvent être classées comme tolérantes, intermédiares ou susceptibles. Six lignées de soja, Nam2, TGx 1448-...


Tukamuhabwa, PhinehasDashiell, Kenton E.Rubaihayo, P.Nabasirye, M.[Determination of field yield loss and effect of environment on pod shattering in soybean]Determination of field yield loss and effect of environment on pod shattering in soybean

Growing soybean varieties with high residue yield may help to sustain the soil organic matter (SOM) content when recycled. Replicated field trials were conducted in four Guinea savanna sites in Nigeria to study the dry matter partitioning in six soybean genotypes and evaluate them for biomass pro...


Singh, A.Carsky, R.Lucas, E.Dashiell, Kenton E.[Soybean maturity and environmental effects in savanna systems; I: dry matter accumulation]Soybean maturity and environmental effects in savanna systems; I: dry matter accumulation

Shoot-tips 15cm long from 15 soybean cultivars and breeding lines were individually immersed in Hoagland's solution in 1 × 14 cm test tubes, and supported by cotton plugs. All leaves were removed leaving about 1 cm of each petiole on the shoot. A 4 mm mycelial plug of Sclerotium rolfsii Sacc., ta...


Akem, C.Dashiell, Kenton E.[Detached shoot technique to evaluate the reaction of soybean cultivars to Sclerotium rolfsii]Detached shoot technique to evaluate the reaction of soybean cultivars to Sclerotium rolfsii
Akem, C.Uwala, A.C.Dashiell, Kenton E.[Evaluation of soybean cultivars for susceptibility to pyrenochaeta leaf blotch]Evaluation of soybean cultivars for susceptibility to pyrenochaeta leaf blotch

Several legumes with high biological nitrogen fixation (BNF) potentials have been studied in on-station trials. The processes involved in BNF and the benefits of these species to crop production need to be evaluated using farmers' management practices in farmers' fields. An on-farm trial with 20 ...


Okogun, J.Sanginga, NteranyaAbaidoo, R.C.Dashiell, Kenton E.Diels, J.[Onfarm evaluation of biological nitrogen fixation potential and grain yield of Lablab and two soybean varieties in the northern Guinea savanna of Nigeria]Onfarm evaluation of biological nitrogen fixation potential and grain yield of Lablab and two soybean varieties in the northern Guinea savanna of Nigeria

The symbiotic performance of promiscuous soybeans depends upon the population size, effectiveness and survival of indigenous or introduced rhizobia in the field. A pot experiment was conducted using soils collected from 13 farmers' fields located in two agroecological zones (northen and southern ...


Sanging, N.Abaidoo, R.C.Dashiell, Kenton E.Carsky, R.J.Okogun, A.[Persistence and effectiveness of rhizobia nodulating promiscuous soybeans in moist savanna zones of Nigeria]Persistence and effectiveness of rhizobia nodulating promiscuous soybeans in moist savanna zones of Nigeria

The influence of soybean (Glycine max) planting date on seasonal epidemics of frogeye leaf spot caused by Cercospora sojina and on grain yield, was evaluated during the 1991 and 1992 cropping seasons. Two susceptible (Samsoy 1 and TGx 849-313D) and one resistant (TGx 996-26E) soybean cultivars we...


Akem, C.Dashiell, Kenton E.[Effect of planting date on severity of frogeye leaf spot and grain yield of soybeans]Effect of planting date on severity of frogeye leaf spot and grain yield of soybeans

Phosphorus fertilizer was applied at two rates to four soyabean varieties of different duration to maturity at four sites. The P rate had no significant (p > 0.05) interaction with site or variety. TGx1670-1F, one of the two late varieties, had the highest levels of total P (11 kg/ha) and apparen...


Ogoke, I.J.Togun, A.O.Carsky, R.J.Dashiell, Kenton E.[Phosphorus recovery from triple superphosphate by soyabean in the Guinea savanna of Nigeria]Phosphorus recovery from triple superphosphate by soyabean in the Guinea savanna of Nigeria

It has been difficult to explain the rotation effect based solely on N availability in maize-soybean cropping systems in the moist savanna zone of sub-Saharan Africa. Although arbuscular mycorrhizal fungi (AMF) can contribute to plant growth by reducing stresses resulting from other nutrient defi...


Sanginga, N.Carsky, R.J.Dashiell, Kenton E.[Arbuscular mycorrhizal fungi (AMF) respond to rhizobial inoculation and cropping systems in farmers fields in the Guinea savanna]Arbuscular mycorrhizal fungi (AMF) respond to rhizobial inoculation and cropping systems in farmers fields in the Guinea savanna

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