History:The Agriculture Chemistry

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History:The Agriculture Chemistry

At the beginning of the 20th century, the soil was not fertile any more because of repeated cultivation, and the output of the food supplies also dropped. So many scientists were devoted to the research on the soil. Then the natural nitrate fertilizers were put into practice.

  • Added:2006
  • Country:Germany
  • Duration:30
  • Time of update:2011/8/26 10:14:00

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