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Asadu, C.Diels, J.Vanlauwe, Bernard[A comparison of the contributions of clay, silt and organic matter to the effective CEC of soils of subSaharan Africa]A comparison of the contributions of clay, silt and organic matter to the effective CEC of soils of subSaharan Africa

Growers of yam demarcate certain areas as being suitable for yam culture and the factors responsible are suspected to relate to both prevailing soil and aerial environments. No empirical evidence to substantiate this suggestions has been documented. Two popular cultivars were selected from each o...


Asadu, C.Ezumah, H.C.Nweke, F.Akammigbo, F.O.[The performance of six cultivars of white yam derived from three sources and evaluated across three zones in southern Nigeria]The performance of six cultivars of white yam derived from three sources and evaluated across three zones in southern Nigeria
Nweke, F.Ugwu, B.Asadu, C.Ay, P.[Production costs in the yambased cropping systems of southeastern Nigeria: RCMP research monograph, No. 6]Production costs in the yambased cropping systems of southeastern Nigeria: RCMP research monograph, No. 6

The relative changes in the composition of six cultivars of white yam (Dioscorea rotundata Poir) were investigated in three major yam ecozones in southeastern Nigeria. The component parameters measured were crude protein, starch and total soluble sugar of the six cultivars at maturity. Each of th...


Asadu, C.Akammigbo, F.Ezumah, H.Nweke, F.[Relative changes in the nutrient composition of six cultivars of white yam grown in three ecozones of southeastern Nigeria]Relative changes in the nutrient composition of six cultivars of white yam grown in three ecozones of southeastern Nigeria

Micronutrients content in a cleared forestland continuously cropped for seven years with cassava, maize, pigeon pea and their combinations and subsequently fallowed for eight years were monitored in this study in order to determine the availability of these nutrients after these years. Soil sampl...


Asadu, C.Chibuike, G.Dixon, A.[Micronutrients availability in a cleared forestland after seven years of continuous cultivation and eight years of natural fallow in an Alfisol, eastern Nigeria]Micronutrients availability in a cleared forestland after seven years of continuous cultivation and eight years of natural fallow in an Alfisol, eastern Nigeria

The contributions of soil variables to the variations in the yields of cassava (Manihot esculenta), yam (Dioscorea rotundata), maize (Zea mays) and pigeon pea (Cajanus cajan) were evaluated over 2 years in this study. The data were from three replicates of two randomized complete block design exp...


Asadu, C.Dixon, A.Okechukwu, R.[Comparative evaluation of the contributions of soil physicochemical properties to variations in the yields of four major staple food crops in eastern Nigeria]Comparative evaluation of the contributions of soil physicochemical properties to variations in the yields of four major staple food crops in eastern Nigeria

The soils of major cassava-growing areas of Nigeria were sampled at 0-20 and 20-40 depths in 1991. The objectives were to compare the nutrient levels in both cassava fields and other arable crop fields and relate their nutrient levels to possible factors that affect them. Approximately 470 sample...


Asadu, C.Nweke, F.[Impact of agroecology on soil fertility status and cassava yield in Nigeria: 1: nutrient levels in soils growing cassava]Impact of agroecology on soil fertility status and cassava yield in Nigeria: 1: nutrient levels in soils growing cassava

Several cassava genotypes were observed although there were few bred varieties. The wide diversity in the cassava landraces was a consequence of the action of the farmers in continuously abandoning and introducing cultivars into their system as they tried to select those cultivars that met their ...


Nweke, F.Kapinga, R.Dixon, A.Ugwu, B.Ajobo, O.Asadu, C.[Production prospects for cassava in Tanzania: COSCA working paper, No. 16]Production prospects for cassava in Tanzania: COSCA working paper, No. 16
Nweke, F.Ugwu, B.Dixon, A.Asadu, C.Ajobo, O.[Cassava production in Nigeria: a function of farmer access to markets and to improved production and processing technologies]Cassava production in Nigeria: a function of farmer access to markets and to improved production and processing technologies

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