Finding out the causes of formation to low quality forest and their classification are the bases for the evaluation and future reclamation of stand.
低质低效林的成因和分类是对其林分作出评价和改造的基础。
However, supply is harder to find as forest quality declines and the share to the collector remains low.
但是，由于森林质量下降供应变得越发困难，采集者的收益变低。
The country's forest resources feature inadequate supply, low quality and uneven distribution.
森林资源总量不足、质量低下、分布不均。
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