Therefore, more efforts should be laid on the improvement of soil water environment while following the principle of "selecting suitable tree species for sites" in planting.
因此，在以适地适树原则适应土壤水分环境的同时，应加强土壤水分环境的改善。
The rate of coverage of forest have an evident effect on many environment factors such as soil and water reservation ecological environment improvement.
森林覆被率在保持水土、涵养水源、改善生态环境方面起着很大作用。
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