1. The erodibility of two soils from Kenya;Barber;J. Soil Sci.,1979
2. FAO, 1977. Soil Map of the World, 1:5 000 000. Food and Agriculture Organization of the United Nations and the United Nations Educational, Scientific and Cultural Organization. vol. VI
3. Fischler, M., 1997. Legume green manures in the management of maize–bean cropping systems in eastern Africa with special reference to crotalaria (C. ochroleuca G. Don.). Ph.D. dissertation, Swiss Federal Institute of Technology, Zurich
4. Future benefits from biological nitrogen fixation: an ecological approach to agriculture;Giller;Plant Soil,1995
5. Soil nitrate and water dynamics in sesbania fallows, weed fallows and maize;Hartemink;Soil Sci. Society Am. J.,1996