Zoning, classifying and grading are necessary for management of water conservation forest and afforestation.
这些区划、分类和分级工作，对于水源涵养林的经营和造林都是必须的工作。
The most effective pattern for soil conservation was the artificial forest with underbrush treatment, and the best water conservation pattern was the treatment of planting tea bush on contour terrace.
林下地表覆盖处理的保土效果最好，等高梯田种植茶树处理的保水效果最好。
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