Ecology. Soil fertility and hunger in Africa.
Sanchez
Pedro A
PA
International Center for Research in Agroforestry, Post Office Box 30677, Nairobi, Kenya. P.sanchez@cgiar.org
D017954:Africa South of the Sahara; D000383:Agriculture / Q000379:methods*; D018533:Biomass; D018556:Crops, Agricultural / Q000254:growth & development*; D017753:Ecosystem; D005308:Fertilizers; D005523:Food Supply; D016468:Forestry; D006801:Humans; D006815:Hunger; D009584:Nitrogen; D009586:Nitrogen Fixation; D010710:Phosphates; D063245:Plant Development; D011640:Public Policy; D012987:Soil; D014197:Trees / Q000254:growth & development; D014480:United Nations; D003313:Zea mays / Q000254:growth & development
D005308:Fertilizers; D010710:Phosphates; D012987:Soil; D009584:Nitrogen