In the Sahel of West Africa, the productivities of rangelands, croplands and livestock are inextricably linked. Cattle, sheep and goats graze rangelands and crop residues, and their manure/urine is used to fertilize crops. Rangelands provide important feeds during the manuring period, resulting i...
Powell, J.M.
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Fernández Rivera, S.
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Hiernaux, Pierre H.Y.
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Turner, M.D.
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[Nutrient cycling in integrated rangeland/cropland systems of the Sahel]
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Nutrient cycling in integrated rangeland/cropland systems of the Sahel
Crop growth on acid sandy soils of the Sudano-Sahelian zone is primarily limited by the low amounts of organic matter and available mineral nutrients in the topsoil. The shortening of fallow periods with population growth, the exploitation of fire wood, spatial nutrient transfers by wind and wate...
Buerkert, Andreas
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Hiernaux, Pierre H.Y.
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[Nutrients in the West African Sudano-Sahelian zone: Losses, transfers and role of external inputs]
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Nutrients in the West African Sudano-Sahelian zone: Losses, transfers and role of external inputs
Poor cropland fertility and a rapidly rising demand for food force Sahelian farmers to cultivate more land and shorten fallow periods. This mostly leads to a gradual decline in crop yields per hectare, which can be counterbalanced by the systematic use of livestock manure on cropland. To assess t...
Schlecht, E.
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Hiernaux, Pierre H.Y.
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Achard, F.
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Turner, M.D.
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[Livestock related nutrient budgets within village territories in western Niger]
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Livestock related nutrient budgets within village territories in western Niger
Many semiarid regions of Sub-Saharan Africa (SSA) are experiencing vast increases in human population pressure and urbanization. These augment the demand for agricultural products and have led to the expansion, intensification, and often closer integration of crop and livestock production systems...
Powell, J.M.
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Pearson, R.A.
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Hiernaux, Pierre H.Y.
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[Crop-livestock interactions in the West African drylands]
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Crop-livestock interactions in the West African drylands
The sustainability of nutrient transfers in integrated rangeland/cropland systems of the Sahel was examined in relation to the impact of livestock. Rangeland nutrient balances are considered in equilibrium whereas croplands lack the internal capacity to replenish nutrient off takes in grain and c...
Powell, J.M.
,
Fernández Rivera, S.
,
Hiernaux, Pierre H.Y.
,
Turner, M.
,
[Nutrient cycling in integrated rangeland/cropland systems of the Sahel]
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Nutrient cycling in integrated rangeland/cropland systems of the Sahel
Night corralling of livestock directly in crop fields during the dry season contributes to nutrient cycling for the benefit of crops. Rangeland grazing and corralling livestock on selected croplands result in a spatial transfer of organic matter and nutrients from rangelands to the corralling sit...
Hiernaux, Pierre H.Y.
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Fernández Rivera, S.
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Schlecht, E.
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Turner, M.
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Williams, Timothy O.
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[Livestock-mediated nutrient transfers in Sahelian agro-ecosystems]
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Livestock-mediated nutrient transfers in Sahelian agro-ecosystems
This paper outlines the role of livestock in integrated nutrient management in semi-arid west Africa. Farmers' strategies in the use of animal manure as well as research efforts to better understand the process of nutrient cycling through livestock in mixed farming systems are described. It con...
Williams, Timothy O.
,
Hiernaux, Pierre H.Y.
,
Fernández Rivera, S.
,
[The role of livestock in integrated nutrient management in semi-arid West Africa]
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The role of livestock in integrated nutrient management in semi-arid West Africa
The influence of forage type, feed allowance and watering time on faeces and urine excretion by cattle, sheep and goats was studied. Higher amounts of nitrogen (N) were excreted during the day than during the night. The occurrence of defaecation and urination was highest at the time of getting up...
Schlecht, E.
,
Fernández Rivera, S.
,
Hiernaux, Pierre H.Y.
,
[Timing, size and nitrogen concentration of faecal and urinary excretions in cattle, sheep and goats: An they be exploited for better manuring of cropland?]
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Timing, size and nitrogen concentration of faecal and urinary excretions in cattle, sheep and goats: An they be exploited for better manuring of cropland?