Root characteristics associated with phosphorus (P) uptake under limiting soil-P conditions were examined in two sets of greenhouse experiments. Average diameter and length of soybean, cowpea, maize and sorghum roots were assessed after 7 weeks in three low-P soils amended with P fertilizer at 0,...
Nwoke, O.C.
,
Diels, J.
,
Abaidoo, R.C.
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Nziguheba, Generose
,
Merckx, R.
,
[Organic acids in the rhizosphere and root characteristics of soybean (Glycine max) and cowpea (Vigna unguiculata) in relation to phosphorus uptake in poor savanna soils]
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Organic acids in the rhizosphere and root characteristics of soybean (Glycine max) and cowpea (Vigna unguiculata) in relation to phosphorus uptake in poor savanna soils
The fractionation of soil P into various organic and inorganic pools with differing levels of bioavailability, coupled with knowledge of the P adsorption and desorption characteristics of the soils, provides insights into management strategies that enhance P availability to crops. Sequential soil...
Nwoke, O.C.
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Vanlauwe, Bernard
,
Diels, J.
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Sanginga, Nteranya
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Osonubi, O.
,
[The distribution of phosphorus fractions and desorption characteristics of some soils in the moist savanna zone of West Africa]
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The distribution of phosphorus fractions and desorption characteristics of some soils in the moist savanna zone of West Africa
Nutrient depletion is a major constraint to crop production for moist savanna soils, and inputs of nutrients are required to overcome this constraint. The impact of sole and combined applications of organic inputs (OIs) [fresh tree prunings, Pueraria phaseoloides (Roxb.) Benth. residues, and manu...
Vanlauwe, Bernard
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Aihou, K.
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Aman, S
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Iwuafor, E.N.O.
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Tossah, B.K.
,
Diels, J.
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Sanginga, Nteranya
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Lyasse, O.
,
Merckx, R.
,
Deckers, J.
,
[Maize yield as affected by organic inputs and urea in the West African moist savanna]
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Maize yield as affected by organic inputs and urea in the West African moist savanna
Crop response, tree biomass production and changes in soil fertility characteristics were monitored in a long-term (1986–2002) alley-cropping trial in Ibadan, Nigeria. The systems included two alley cropping systems with Leucaena leucocephala and Senna siamea on the one hand and a control (no-tre...
Vanlauwe, Bernard
,
Diels, J.
,
Sanginga, Nteranya
,
Merckx, R.
,
[Long-term integrated soil fertility management in South-western Nigeria : Crop performance and impact on the soil fertility status]
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Long-term integrated soil fertility management in South-western Nigeria : Crop performance and impact on the soil fertility status
The 13C natural labeling technique in combination with modeling could potentially be used to analyze SOM changes in long-term experiments involving complex cropping systems such as agroforestry systems. It requires information on quantity and 13C abundance of all plant materials entering the soil...
Diels, J.
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Vanlauwe, Bernard
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Sanginga, N.
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Coolen, E.
,
Merckx, R.
,
[Temporal variations in plant delta 13C values and implications for using the 13C technique in longterm soil organic matter studies]
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Temporal variations in plant delta 13C values and implications for using the 13C technique in longterm soil organic matter studies
Although the fertility status of soils in the West African moist savanna is generally believed to be low, crop yields on farmers' fields vary widely from virtually nil to values near the potential production. The soil fertility status was evaluated for a number of farmers' fields selected at rand...
Vanlauwe, Bernard
,
Diels, J.
,
Lyasse, O.
,
Aihou, K.
,
Iwuafor, E.
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Sanginga, N.
,
Merckx, R.
,
Deckers, J.
,
[Fertility status of soils of the derived savanna and northern guinea savanna benchmarks and response to major plant nutrients, as influenced by soil type and land use management]
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Fertility status of soils of the derived savanna and northern guinea savanna benchmarks and response to major plant nutrients, as influenced by soil type and land use management
Although the West-African moist savanna zone has a high potential for crop production, yields on farmers' fields are, on average, far below this potential, mainly due to the low use of external sources of nutrients. Since the mid-1990s, it has become clear that in order to upgrade crop production...
Vanlauwe, Bernard
,
Aihou, K.
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Houngnandan, P.
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Diels, J.
,
Sanginga, N.
,
Merckx, R.
,
[Nitrogen management in adequate input maizebased agriculture in the derived savanna benchmark zone of Benin Republic]
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Nitrogen management in adequate input maizebased agriculture in the derived savanna benchmark zone of Benin Republic
One of the options to alleviate soil fertility constraints for sustainable agriculture in the savannas of West Africa is to develop soil nutrient management technologies from an adequate supply and feasible share of organic and mineral inputs. This paper makes a diagnosis of farm-level use of org...
Manyong, Victor M.
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Makinde, K.
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Sanginga, N.
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Vanlauwe, Bernard
,
Diels, J.
,
[Fertilizer use and definition of farmer domains for impactoriented research in the northern Guinea savanna of Nigeria]
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Fertilizer use and definition of farmer domains for impactoriented research in the northern Guinea savanna of Nigeria
Integrated crop-livestock farming in the Guinea savanna of West Africa is often assumed to lead to synergies between crop and livestock production, thereby improving the overall productivity and resilience of agricultural production. Whether these synergies actually occur remains poorly studied. ...
Franke, A.C.
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Berkhout, E.D.
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Iwuafor, E.N.O.
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Nziguheba, Generose
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Dercon, G.
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Vandeplas, I.
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Diels, J.
,
[Does crop-livestock integration lead to improved crop production in the savanna of West Africa?]
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Does crop-livestock integration lead to improved crop production in the savanna of West Africa?
Carsky, R.J.
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Douthwaite, Boru
,
Schulz, S.
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Sanginga, Nteranya
,
Manyong, Victor M.
,
Diels, J.
,
Keatinge, J.D.H.
,
[Lessons for appropriate technology generation: example of soil management technology at IITA]
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Lessons for appropriate technology generation: example of soil management technology at IITA