Management of nitrogen fertilizers for tropical African soils

摘要: Nitrogen is a key element in food crop production tropical Africa. To large extent, stable the tropics function of degree to which soil fertility maintained. Nitrogen, most mobile plant nutrient, easily exhaustible nutrient soil. This particularly true fragile, poorly buffered soils commonly found Traditional farmers Africa adequate solutions deal with this problem through shifting cultivation and use leguminous crops restore fertility. Return residues maintenance continuous stand were means avoiding degradation. The increase population pressure, coupled urbanization countryside, has led farmland being continuously used resulting loss productivity. Use fertilizer increasingly seen as partial solution restoring providing for African population.