乔化稀植苹果树冠投影的理论模型研究

许华森，孙志梅

Theoretical model for predicting the shadow boundary of individual crown in sparsely planted apple orchard

河北农业大学学报 . 2021, (3): 41 -46 . DOI: 10.13320/j.cnki.jauh.2021.0045