热脱附处理后的清洁土壤可以用于土地平整。
The clean soil after thermal desorption disposal can be used for earth levelling.
土地平整、人口稀少、土壤肥力较低，是该林业公司机械化作业、集约化经营、主伐年龄较大的缘由。
The flat land and sparse population and relative lean soil cause forest management to depend on mechanization and intensive cultivation and old-aged harvest system.
新建苗圃和原有苗圃不符合上述要求的，要逐步平整和进行土壤改良，改变苗圃生产条件。
New nursery and the original nursery does not meet the above requirements, should be gradually formed and the soil improvement, change the nursery production conditions.
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