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□¡□History of agriculture□¡□

century, agriculture has been characterized by enhanced productivity, the replacement of human labor by synthetic fertilizers and pesticides, selective breeding , and mechanization . The recent history of agriculture has been closely tied with a range of political issues including water pollution , biofuels , genetically modified organisms , tariffs , and farm subsidies . In recent years, there has been a backlash against the external environmental effects of mechanized agriculture, and increasing support for the organic movement and sustainable agriculture .

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