Tillage effects on soil organic carbon and nitrogen distribution in particle size fractions of a red clay soil profile in Zimbabwe

Chivenge, P.P.; Murwira, Herbert K.; Giller, Ken E. 2003. Tillage effects on soil organic carbon and nitrogen distribution in particle size fractions of a red clay soil profile in Zimbabwe. In: Bationo, André (ed.). Managing nutrient cycles to sustain soil fertility in sub-Saharan Africa. Academy Science Publishers (ASP); Centro Internacional de Agricultura Tropical (CIAT), Nairobi, KE. p. 113-126.