The POD activity have a strikingly negative relationship with the heightoftree, trunk girth, diameter of crown, the volume of the tree crown, and the dwarfed nature of the stocks.
POD活性与树高、干周、冠径、树冠体积呈显著负相关，与砧木的矮化性呈负相关。
2
Additionally, investigations on shelterbelt trees were carried out, and stem-analysis techniques were used, to develop a method for determining the mature heightoftree windbreaks (H0).
另外，通过对林带树木的野外调查，应用树木解析技术确定林带成林高(H 0)。
3
The trajectory of umbrage motion shaped a butterfly arc belt. The situations of outside and inner arc belt were influenced by heightoftree (H) and the height below branch respectively.