通过盆栽试验研究了不同用量污泥对石灰性生土和熟土有机质和全氮、全磷、全钾含量的影响。
Sewage Sludge on the Contents of Organic Matter, Total n, Total P, and Total K in Calcareous Immature Soil and Calcareous Mellow Soil.
以豫麦34号和郑州9023为材料，研究了氮、磷、钾施用量及其配比对小麦营养品质和加工品质的影响。
The effect of the level and proportion of nitrogen, phosphorus and potassium on the nutrition and industrial quality of wheat was studied with Yumai 34 and Zhengzhou 9023 as materials.
采用在实验室培养和用淋洗管模拟田间淋洗的方法研究聚丙烯酰胺对沙土水稳性团粒结构改良作用，对氮、磷、钾养分保肥的作用以及其合理施用量。
This paper study on the effects of PAM on improving water stable aggregate and reducing nutrients loss from sandy soil, methods of Laboratory incubation and leaching were adopted.
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