The effect of push cart skidding on the physical and chemical properties of soil was analyzed quantitatively.
定量分析手板车集材对集材道土壤理化性质的影响，提出减少集材作业对林地土壤破坏的具体措施。
This experiment mainly carries on four aspects:Effects of earthworm on the physical and chemical properties of soil;
本试验主要进行以下方面的研究：蚯蚓对土壤理化性质的影响；
Through the research, it is explicit that slash disposal has also affected on the physical and chemical properties of soil on the harvested sites.
结果表明，迹地清理方式对作业迹地土壤理化特性产生一定程度的影响，进而影响森林采伐后的迹地天然更新与苗木生长质量。
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