In the world wide, most of maize was planted in poor soil, and nitrogen is one of most important nutrition elements for maize growing, especially for maize yield.

世界范围内，相当一部分玉米种植在十分瘠薄的土壤上，氮素缺乏成为玉米生产最重要的限制因子之一。

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In the world wide, most of maize was planted in poor soil, and nitrogen is one of most important nutrition elements for maize growing, especially for maize yield.

世界范围内，相当一部分玉米种植在十分瘠薄的土壤上，氮素缺乏成为玉米生产最重要的限制因子之一。

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