基肥与追肥之间肥效无显著差异.There was no obvious difference between base fertilizer and after manuring.将矿物材料用于肥料中,可以提高肥效,改良土壤.Fertilizer efficiency can be improved by adding mineral materials.尽管有这些优点, 但常见的施肥措施造成尿素肥效不高.Despite these a...
聚乙烯醇 的耐辐解可通地苄叉化和苯甲酰化提高.Poly ( vinyl alcohol ) has been protected against radiation by benzalation and benzoylation.聚乙烯醇的耐辐解可通过苄叉化和苯甲酰化提高.Poly alcohol has been protected against radiation by benzalation and benzoylation.酰...