Agricultural Systems · 1987 · 40 citations · 16 references
AgricultureAgronomyCrop SciencesCropping SystemsIntegrated Crop-livestock SystemsNutrient ManagementAgricultural Production SystemsLivestock Production SystemsManure Nutrient ManagementNitrogen ManagementNitrogen NutritionNutrient ExportManure Nitrogen ManagementNitrogen Cycling In PasturesNitrogen Fertility ManagementNitrogen Fertilizer ManagementNitrogen Management In PasturesPhosphorus Dynamics In PasturesPhosphorus Recovery From Animal Manure
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Rangeland Productivity and Exploitation in the Sahel
H. Breman, C.T. de Wit · Science · 1983 · 468 citations · Full text
Farming systems in the tropics
E. W. Russell · Agricultural Administration · 1978 · 122 citations
Nitrogen cycling in West African ecosystems
Agricultural Systems · 1982 · 92 citations