Harvest index of phosphorus and potassium is similar with that of nitrogen,decreasing with the increase of application value and soil phosphorus and potassium content has no effects.
磷钾肥的收获指数与氮相似,随施肥水平的提高而下降,土壤磷钾含量对其并无影响。
参考来源 - 不同地力条件下不同养分水平对超级稻产量及养分利用率的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
土壤磷素的农业非点源污染是导致水体污染的最主要的原因之一。
Soil phosphorus as agricultural non-point source pollution is one of the main factors which lead to water pollution.
土壤最经常缺乏氮和磷。
Soils are most commonly deficient in nitrogen and phosphorus.
和普通土壤相比，马粪更富含磷和氮。
Horse waste is rich in phosphorus and also nitrogen compared to normal soil.
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