土壤类型

Order for effects of these factors on the putridity of cuttings was given.Four composite patterns of lower infective disease rate were obtained.

分析还表明因素对保加利亚玫瑰嫩枝扦插腐烂病影响最大，其次是插穗因素和浸穗试剂，并据此提出感病率较低的4种组。

The compositions of phyllosilicate and iron oxides for several main types of soils and their corresponding iron-manganese nodules were studied by the means of XRD.

以我国种常见相应铁锰结核为试验材料，应用X-射线衍射，研究了和铁锰结核中层状硅酸盐和氧化铁的组。