Okumu, B N; Jabbar, Mohammad A.; Colman, D; Russel, N - International Livestock Research Institute (ILRI), … - 1999
suitability, and utilize between 10-20% of their farm income to purchase and apply chemical fertilizer, their net returns could … based on changing land suitability. Shortfalls in on-farm staple grains supplies caused by such rotations can then be met …