Soil characterization and classification; Soil-plant-water relations; Nitrogen sources and use; Management of acid soils; Soil management systems; Soil fertility evaluation; Approach and coordination of soils research for development.

Agricultural ecology, or agroecology, deals in general with the structure and function of agroecosystems at different levels of resolution. In this text/reference, the authors describe in terms of agroecology the tropical environments of sub-Saharan Africa, Southeast Asia, and Latin and Central America, focusing on production and management systems unique to each region.