Natural Resources and the Human Environment for Food and Agriculture

Africa agricultural production animal annual aquaculture arid Asia assessment Atlantic belts biological breeds catches cattle climate closed forest conservation consumption contamination crop degradation demand depletion desertification developing countries developing market economies developing world drainage ecological economic ecosystems effects environment estimated exploitation fallow fisheries food and agricultural forage resources fuelwood genetic resources global grazing and forage grazing land groundwater hectares highlands humid tropical important improved increase industrial integrated pest management irrigation land area Latin America legumes livestock major million hectares mineral fertilizers natural resources needs Nigeria nitrogen nitrogen fixation North nutrients particularly pest pesticides plant pollution population potential pressure productive capacity programmes regions requirements result Rhizobium salinity savanna seed semi-arid shifting cultivation socio-economic soil erosion soil resources Source South America species stocks strains sustained basis Table tons tropical forest UNEP United Nations vegetation wildlife wood wood fuel World Fish zones