Manure is a key nutrient resource on smallholder farms in the tropics, especially on poorly buffered sandy soils, due to its multiple benefits for soil fertility. Farmers preferentially apply manure to fields closest to homesteads (homefields), which are more fertile than fields further away (out...
Zingore, Shamie
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Delve, Robert J.
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Nyamangara, Justice
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Giller, Ken E.
,
[Multiple benefits of manure : The key to maintenance of soil fertility and restoration of depleted sandy soils on African smallholder farms]
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Multiple benefits of manure : The key to maintenance of soil fertility and restoration of depleted sandy soils on African smallholder farms
This paper reports on a Participatory Learning and Action Research (PLAR) process that was initiated in three villages in eastern Uganda in September 1999 to enable small-scale farmers to reverse nutrient depletion of their soils profitably by increasing their capacity to develop, adapt and use i...
Esilaba, Anthony O.
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Byalebeka, J.B.
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Delve, Robert J.
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Okalebo, JR
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Ssenyange, D
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Mbalule, M
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Ssali, H.
,
[On farm testing of integrated nutrient management strategies in Eastern Uganda]
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On farm testing of integrated nutrient management strategies in Eastern Uganda
The role of livestock in nitrogen cycling in mixed crop-livestock farming systems of sub-Saharan Africa was explored. Cattle were fed a range of diets to investigate the effects on partitioning of nitrogen between urine and faeces and on the chemical composition of the manures produced. The trade...
Delve, Robert J.
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Cadisch, Georg
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Tanner, J.C.
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Thorpe, W.R.
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Thorne, Peter J.
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Giller, Ken E.
,
[Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa]
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Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa
Masvaya, EN
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Nyamangara, Justice
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Nyawasha, RW
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Zingore, Shamie
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Delve, Robert J.
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Giller, Ken E.
,
[Effect of farmer management strategies on spatial variability of soil fertility and crop nutrient uptake in contrasting agro-ecological zones in Zimbabwe]
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Effect of farmer management strategies on spatial variability of soil fertility and crop nutrient uptake in contrasting agro-ecological zones in Zimbabwe
In African smallholder agriculture, improved farm-scale understanding of the interaction between the household, crops, soils and livestock is required to develop appropriate strategies for improving productivity. A combination of models was used to analyse land use and labour allocation strategie...
Zingore, Shamie
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González Estrada, E.
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Delve, Robert J.
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Herrero, Mario T.
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Dimes, John P.
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Giller, Ken E.
,
[An integrated evaluation of strategies for enhancing productivity and profitability of resource-constrained smallholder farms in Zimbabwe]
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An integrated evaluation of strategies for enhancing productivity and profitability of resource-constrained smallholder farms in Zimbabwe
Resource flow models are useful tools that assist farmers in analysing their soil fertility management strategies and in planning, experimenting and adapting ways to improve the use of scarce local resources. Resource flows and farm nutrient balance studies were carried out in eastern Uganda to a...
Esilaba, Anthony O.
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Nyende, P
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Nalukenge, G
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Byalebeka, J.B.
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Delve, Robert J.
,
Ssali, H.
,
[Resource flows and nutrient balances for crop and animal production in smallholder farming systems in Eastern Uganda]
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Resource flows and nutrient balances for crop and animal production in smallholder farming systems in Eastern Uganda
Promiscuous soyabean varieties have potential to contribute significantly to income generation, food security and soil N budgets on smallholder farms. One of the major factors limiting this potential is farmers preference to allocate nutrient resources to food security cereal crops on the most f...
Zingore, Shamie
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Murwira, HK
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Delve, Robert J.
,
Giller, Ken E.
,
[Variable grain legume yields, responses to phosphorus and rotational effects on maize across soil fertility gradients on African smallholder farms]
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Variable grain legume yields, responses to phosphorus and rotational effects on maize across soil fertility gradients on African smallholder farms
Canavalia ensiformis, Crotalaria grahamiana, Dolichos lablab, Mucuna pruriens, Tephrosia vogellii and Tithonia diversifolia were evaluated as potential species for soil fertility replenishment in on-farm adaptive trials, farm visits and field days in Tororo District, eastern Uganda. Farmers used ...
Nyende, P
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Delve, Robert J.
,
[Farmer participatory evaluation of legume cover crop and biomass transfer technologies for soil fertility improvement using farmer criteria, preference ranking and logit regression analysis]
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Farmer participatory evaluation of legume cover crop and biomass transfer technologies for soil fertility improvement using farmer criteria, preference ranking and logit regression analysis
Amidst the economic backdrop of resource-poor farmers, combined research and extension efforts in developing countries have focused on developing and promoting potentially adaptable and economically acceptable agronomic technologies that suit farmers situations. Practices like improved fallows w...
Delve, Robert J.
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Huising, Jeroen
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Bagenze, P
,
[Target area identification using a GIS approach for the introduction of legume cover crops for soil productivity improvement : A case study eastern Uganda]
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Target area identification using a GIS approach for the introduction of legume cover crops for soil productivity improvement : A case study eastern Uganda
Knowledge of soil spatial variability is important in natural resource management, interpolation and soil sampling design, but requires a considerable amount of geo-referenced data. In this study, mid-infrared spectroscopy in combination with spatial analyses tools is being proposed to facilitate...
Cobo Borrero, Juan G.
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Dercon, G.
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Yekeye, T
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Chapungu, L
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Kadzere, C
,
Murwira, A
,
Delve, Robert J.
,
Cadisch, Georg
,
[Integration of mid-infrared spectroscopy and geostatistics in the assessment of soil spatial variability at landscape level]
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Integration of mid-infrared spectroscopy and geostatistics in the assessment of soil spatial variability at landscape level