An increasing amount of forest land has been used for industrial purposes, or for agricultural development such as crop growing.
越来越多的林地被用于工业目的，或用于农业发展，如种植作物。
2
Forests are not only trees, and forest ecosystems are more fragile, longer-lived and less closely controlled than crop fields.
森林不仅仅是树木，森林的生态系统更加脆弱，寿命更长，与农田相比更松散的管理模式。
3
Results showed that in compound management of forest and agriculture it is obviously existed the effect on soil chemical property, and there is difference because of variety of the crop.