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１９９６～１９９７年试验初步证实镇坪山区玉米“发地火”不是侵染性病害，而是土壤严重缺钾造成。建议在镇坪山区大力推行补钾工程。
Preliminary tests from 1996 to 1997 confirmed that the corn in Zhenping mountain area was not an invasive disease, but was caused by severe potassium deficiency. It is recommended to vigorously promote the project in Zhenping Pingshan.