The results showed that the content of clay particles was significantly correlated with soil swelling rate.
结果表明：土壤粘粒含量与土壤膨胀率呈显著正相关；
The content of soil organic matter affected soil swelling rate remarkably when soil texture was not obviously different.
有机质含量在质地差别不明显情况下，对土壤膨胀率也有极显著的作用与影响；
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