Building Soil Nitrogen Capital in AfricaK.E. Giller, Paramu Mafongoya, W. D. Sakala et al.|SSSA special publication series|1997Cited by 265
Organic matter technologies for integrated nutrient management in smallholder cropping systems of southern AfricaSieglinde S. Snapp, S.R. Waddington, Paramu Mafongoya|Agriculture Ecosystems & Environment|1998Cited by 220