The organic content of soil is higher in the garden in front of inhabitant building because it may be fertilized by the inhabitants.
家属区人工菜园土壤有机质含量较高，与居民人工施肥有关。
Ancient soil with a large number of inhabitants' activity in the area can be used to explore the natural environment of human activities and intensity of the response process.
在有大量先民活动地区遗存的古土壤可用来探讨自然环境对人类活动类型及强度的响应过程。
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