... gary sandy 加里砂质 love sandy 我受冷风吹 sandy aggregate 砂质集料 ...
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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.
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。
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