By using plot experiment, the paper studied nutritional effects of N P K fertilizers and the effect on seasonal changes in concentrations of N P K and their distribution patterns on sugarbeet.
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释义
研究了淋溶黑钙土土壤施用氮磷钾肥对甜菜体内氮磷钾浓度的变化和分布模式的效应。
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