For most of the agroforestry systems the net costs are low, especially in the south, the southwest, and the north of China, though their initial investments are high.

  • 大多数农用林生态系统虽然它们的初始成本很高,但由于收益很高,所以净成本是比较低的,特别是在南方区、西南区,在华北也比较低。
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