In this paper, the problem of uneven-aged forest management decision making is considered as a problem of multi-objective decision making.
异龄林经营决策是一个涉及到森林的经济效益和永续利用等多个目标的决策问题。
A transfering probability matrix model of linearly generalized diameter growth was used to deal with the tree species composition problem of mixed unevenly aged forest.
对直径生长转移概率矩阵模型进行了线性扩展，用以研究混交异龄林的树种组成问题。
As a result, forest real estate now sells for rock-bottom prices, and many plots have been abandoned by absentee or aged owners and have fallen into a state of neglect.
因此，现在森林地产以最低的价格出售，而且很多小的地块被外地或年长的业主所抛弃，从而已经落入了无人问津的状态。
The aged denizen of the forest is doomed to succumb to the woodman's stroke!
多年在林中享有权利的香柏树，竟死在樵夫手下！
The result showed that the Welbull Distribution was not only suited to diameter distribution of the even-aged pure forest, but also to the multi.
经研究证明，威布尔分布不但适用于同龄纯林直径分布，而且亦适用于复层异龄林直径分布。
The flat land and sparse population and relative lean soil cause forest management to depend on mechanization and intensive cultivation and old-aged harvest system.
土地平整、人口稀少、土壤肥力较低，是该林业公司机械化作业、集约化经营、主伐年龄较大的缘由。
The wilting litter of the middle aged secondary mountain poplar forest and the decomposing process of litter as well as an amount of their accumulation were analysed with changes in time.
通过对黄土丘陵区中龄山杨次生林的凋落物及其分解过程，以及蓄积量随时间变化的分析，研究了枯枝落叶层的持水和截留作用及其蓄水减沙效益。
The wilting litter of the middle aged secondary mountain poplar forest and the decomposing process of litter as well as an amount of their accumulation were analysed with changes in time.
通过对黄土丘陵区中龄山杨次生林的凋落物及其分解过程，以及蓄积量随时间变化的分析，研究了枯枝落叶层的持水和截留作用及其蓄水减沙效益。
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