Effects of freezing and thawing on soil shear strength in the western farming pastoral ecotone of northern China.

Exploration of the indicative significance of differences in shear strength of three soils The differences in shear strength of the three soils not only indicate the diversity of soil properties in the western part of the northern agro-pastoral zone but also provide a scientific basis for the development of targeted soil protection measures.

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Freeze–thaw cycles reduce and then stabilize soil shear strength With the increase in the number of freeze–thaw cycles, the shear strength of the three soils showed an overall trend of decreasing and then stabilizing, which is consistent with the previous study 11 .

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In contrast, sierozem and chernozem showed a decreasing trend with the increase in the number of freeze–thaw cycles, which may be due to the destruction of the cementing material between soil particles and the decrease in the contact area between the particles, thus reducing the frictional resistance 18 .

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