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acre Age of Discovery agriculture Alliance for Progress American areas balanced diet beans better birth rate Brasilia Brazil Brazilians bushels capital carbohydrate cattle cellulose cent Central America cereals Cerrado certainly chemical chickens Chinese cobs coffee commercial Coon Rapids cost crop Cuba cultivated dry season earth eggs Europe factories feed fertilizer field food production food supplies gain Garst grain grasses grow growth Haiti hens hunger hungry countries hybrid-seed corn increase food India industrial Iowa Jack Cavanaugh Japan land legumes livestock living meat milk million modern farming nations nitrogen nitrogen fertilizer North northeast Brazil oil-seed meals peasant plant food plenty poor population poultry pounds problem protein protein and minerals rains raise Roswell Garst salesman Salvador seed soil South America stalks started sugar surplus termites things tion tractor tropics twenty undeveloped countries United urea wheat yields
Scientist American Behavioral