知识贝壳
知识贝壳
所属栏目：英汉烟草科技
Only at adequate fertilizer levels,particularly N,can leaf tobaccobe produced for good quality and usability. A comparison of fertilizerrates on several critical leaf components was made of four plant positionsof flue-cured tobacco. The result shows,under ......（本文共 1725 字 ） [阅读本文] >>