Setting the long-term strategy of improving and maintaining the land productivity, adjusting the forest composition and structure so as to improve the forest quality in Beijing.
同时还应把维护和提高地力、调整森林的组成和结构作为提高森林质量的一项长期策略；
The article advanced contents, means and problems attended of adjusting industry structure of forest enterprises in order to protect natural forest of state in sichuan province.
本文对保护四川国有天然林资源，提出了森工企业调整产业结构及调整内容、方法和注意问题。
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