Nitrogen (n) is one of the most essential mineral elements and the major limited nutrient for plants.
氮素是植物需求量最大的矿质营养元素，也是影响植物生长的主要营养元素。
Phosphorus is one of the essential mineral elements to plant growth, however, there is fairly less content of soluble phosphorus in soil.
磷是植物生长必需的矿质元素之一，而土壤中可溶性磷的含量比较低。
Abstract: phosphorus is one of the essential mineral elements to plant growth, however, there is fairly less content of soluble phosphorus in soil.
摘要：磷元素植物生长必需的矿质元素之一，而土壤中可溶性磷的含量比较低。
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