forest age

同根派生

The biological decomposition coefficient (BDC) of N, P, and K in dead roots and fallen needles appeared the increasing trends with forest age, and was 0.7-1.5, 1.1-1.7, 1.0-3.5, and 0.9-1.3,1.1-1.7,1.0-1.3, respectively.
a-~1。凋落物层中的N、P、K贮量随林龄增大呈先增加后减少的趋势;全氮、全钾、全磷贮量的变化范围分别为142.;76-534
Econometrics and forest resource evaluation methods are adopted to decide the environmental and timber benefit functions of forest ages.
运用计量经济分析和森林资源价值评价方法获得案例点水源涵养林木材效益、环境效益关于林龄的函数。
The forest will act as a defense against desert dust.
森林能起防御沙漠灰沙的作用。
He prefers to assort with people of his own age.
他更喜欢与自己的同龄人交往。
Even the best quality rubber will perish with age.
就是最佳质量的橡胶也会因老化而腐烂。