采集烟区9种主要类型的土壤,连续进行4次烟草盆栽试验.结果表明,烟草总吸钾量与缓效钾量相关极显著(r=0.985~(**)n=9),为烟草的主......

The results from comparative study of the EUF-K values of four different soils and of their various particle fractions(<......