知识贝壳
知识贝壳
所属栏目：英汉烟草科技
One subject of interest is “grey” flue - cured tobacco. Despitemany studies from different countries,there is no conclusive,unifiedanswer. Among the factors suspected to be associated with “grey” tobacco,are: soil pH,organic matter,maturity at harvesting, ......（本文共 1831 字 ） [阅读本文] >>