[Study on the variation of the soluble nitrogen content and the effect of nitrogen fertilizer in non-paddy soil for vegetable cultivation]. [Korean]
1992
Kim Yung Hui
The content of soluble nitrogen increased to 1.3-1.7 times in summer than in spring, because nitrate process is strongly accelerated by the increase of soil temperature in summer. The need for nitrogen fertilizer in summer Chinese cabbage is smaller than in autumn one.
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