Soil-plant factors and processes affecting productivity in ley farming

Rao, I.M.; AYARZA, M.A.; Thomas, R.J.; FISHER, M.J.; SANZ, J.I.; SPAIN, J.M.; LASCANO, C.E. 1992. Soil-plant factors and processes affecting productivity in ley farming. In: Hardy, Bill (ed.). Pastures for the tropical lowlands: CIAT`s contribution. Centro Internacional de Agricultura Tropical (CIAT), Cali, CO. p. 145-175. (CIAT publication no. 211)