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The Effect of Fossil Fuel Energy Input on Output per ManHour
Increase in Crop Yields in the United States 100 kgha
Increase in Crop Yields in the United Kingdom 100 kgha
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amounts of energy amounts of fossil animal production arable land average carbon dioxide cereals chemical considerable consumer corn crop yields developed countries eating oil economic efficiently energy output energy output:input ratio energy-demanding equipment example farm farmer feed figures food distribution food processing food production foodstuffs fossil fuel energy fuel energy content fuel energy input GJ/ha GJ/ha/yr grassland green manuring green revolution grow grown Imperial Chemical Industries increase input of fossil kg/ha land per person losses man-hour manure meat metabolically utilizable food million MJ of food MJ of fossil MJ/day nation nation's food system nitrogen packaging percent pesticides photosynthesis plants population postfarm primary agricultural production problem save energy solar energy Source substantial supermarket Third World tion total amount total energy total fossil fuel transport U.S. agricultural U.S. food system U.S. government United Kingdom utilizable food energy wastage waste wheat