J., Tarawali, S., Asafo-Adjei, B., Menkir, A., Schulz, S., Singh, B. B., Chikoye, D., Keatinge, D. and Rodomiro, O. 2003.  Sustainable resource management coupled to resilient germplasm to provide new intensive cereal–grain legume–livestock systems in the dry savanna.  Agriculture, Ecosystems and Environment 100: 305–314.

  • Vanlauwe, B., Tittonell, P. and Mukalama, J. 2006. Within-farm soil fertility gradients affect response of maize to fertilizer application in western Kenya. Nutrient Cycling in Agroecosystems 76: 171–182.

  • Bernard Vanlauwe
    International Institute of
    Tropical Agriculture (IITA)
    Nairobi, Kenya