crop fertilization News
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Many Countries Reaching Diminishing Returns in Fertilizer Use
By Lester R. Brown When German chemist Justus von Liebig demonstrated in 1847 that the major nutrients that plants removed from the soil could be applied in mineral form, he set the stage for the development of the fertilizer industry and a huge jump in world food production a century later. Growth in food production during the nineteenth century came primarily from expanding cultivated area. It ...
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Study probes sources of Mississippi river phosphorus
In their eagerness to cut nitrogen and phosphorus pollution in the Mississippi River and Gulf of Mexico, people have often sought simple explanations for the problem: too many large animal operations, for instance, or farmers who apply too much fertilizer, which then flows into waterways. But according to new modeling research that examined phosphorus loading from all 1768 counties in the ...
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America`s Emerging Bioeconomy
AMES, Iowa, August 30, 2007 (ENS) - Robert Anex wants to know what would happen if the increasing demand for ethanol prompts American farmers to decide against crop rotation and plant corn on the same fields, year after year. This spring farmers responded to the ethanol industry's demand for grain by increasing their corn acreage by 19 percent over last year, according to U.S. Department of ...
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