Possibilities of increasing world food production, Issues 10-15

adequate advanced countries Africa agricultural animal protein arable land Asia Australia average basin better breeding cattle cereals climate conservation consumption crop rotation crop yields desert locust disease drainage East economic erosion estimated Europe example existing factors farmers farming feed FIGURE fisheries food production forest grass grasslands grazing greater high yields higher important improved varieties increase India irrigation Japan kilograms kilograms per hectare Latin America legumes livestock livestock numbers livestock production locust losses maize manure meat methods milk million hectares million tons monsoon night soil nitrogen numbers nutrients nutrition output Pakistan pastures pests plant plant breeding population possible potential practices present problem rainfall raising recent regions require result rice rotation savannas season sheep shifting cultivation soil fertility South technical techniques tion tons per hectare tropical underdeveloped United United Arab Republic Uruguay utilization vegetation wheat