biblio toscana

Manual on integrated soil management and conservation practices

Soil conservation and management in the humid tropics

Soil organic matter dynamics and sustainability of tropical agriculture

proceedings of an international symposium organized by the Laboratory of Soil Fertility and Soil Biology, Katholieke Universiteit Leuven (K.U. Leuven) and the International Institute of Tropical Agriculture (IITA) and held in Leuven, Belgium, 4-6 November 1991