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Chart A pinpoints the most urgent problem
Possibilities of extending world agriculture
10 other sections not shown
Africa agricultural amino acids animals areas arid Asia Australia basin breeding Britain Bunyoro canals cattle cent century chemical cloud seeding cost countries crops cultivation dams deficiencies dense desert developed disease drainage drained drought economic effective ejido erosion Europe European example experiments farm farmers farmland fertilizers fish fodder forest gibberellin grasses grazing ground growing growth heathland hectares improved increase India industrial irrigation kilometres land large numbers latifundia Latin America legumes livestock maize manure ment methods metres mineral notably numbers pastures peasant peat plankton plants ploughing polder ponds population potential problem production protein pumped rabbit rain rain-forest rainfall rates reclaimed regions result rice rivers rural saline salt Savana schemes Science Journal season seeding shows silt silver iodide soil South Soviet spraying square kilometre supply taiga techniques tion tonnes tractors trees tropical tsetse fly underdeveloped vegetation West Western wheat yields