It is found in the treatment and study of freezing damages that under freeze thawing condition,the major cause is the moisture migration in the soil and the salt migration caused by it.%通过对冻害实践治理和研究,人们发现冻融条件下,土壤中水分的运移和由水分运移所引起的盐分运移是导致这些现象发生的根本原因。
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