6．土壤化学性质（soil chemical property）:土壤化学性质与土壤 养分状况的关系比物理性质更为密切，它直接影响到植物养料物质 的来源和吸收。
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soil chemical property degradation 土壤化学退化
chemical property of soil 土壤化学 ; 土壤化学性质
soil physical and chemical property 土壤理化性质
soil chemical and biochemical property 土壤化学和生物化学性质
Succession of soil chemical property.
土壤化学性质演变。
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.
研究结果表明：实行农林复合经营对土壤化学性质有显著的影响，并因作物的品种而存在差异。
The influence tendency by different content of lime, water and compacting degree can be found based on the physical and chemical property research of a typical expansive soil and modified treatment.
通过对一种典型膨胀土物理力学性质的研究及掺加石灰进行改性处理试验，得出了不同掺灰量、不同含水量及不同压实度对膨胀土性能的影响规律。
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