单词crown canopy
un.: 树冠层
网络: 林冠；森林顶盖
树冠层
The effect of the experiment of forcing flowers by nurturing the root and controlling the crown canopy on the output of the hawthorn trees
养根控冠促花技术对山楂树产量的影响试验
On Seedling Growth of Larch with Film Mulching under Crown Canopy
林冠下塑料薄膜覆盖落叶松育苗初探