Since 1960 the global population has more than doubled, but the total production of crop farming increased three and a half times, measured in calories. Meanwhile, agriculture area increased with less than ten percent and grasslands even less (grasslands are now shrinking quite rapidly according to FAOSTAT). The increase of production has been driven by irrigation, multiple cropping and the green revolution technology packet of artificial fertilizers, pesticides and new varieties. By far, the most spectacular development in farming is not yield per area unit however, but the increased productivity of farm labor. Instead of catering for the need of the family and a smaller surplus extracted by lords of various sorts, a farmer or farm worker today often produce food for hundreds of people. If we look at staple foods in the most mechanized farm regions, one worker may actually “feed” thousand person.
Through this extraordinary increase in land and labor productivity, cost of grains, oilseeds and soybeans have plummeted while production has quadrupled. The net effect is a great increase in food energy available to humans. In addition, the rapidly increasing use of crops as animal feed and biofuel feed stock have swallowed an even larger share. Meanwhile, the continued intensification of farming is the root cause of the huge environmental impact from the food system, the destruction of habitats, the broken cycles of nutrients such as nitrogen and phosphorus and the huge effect on the climate.
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