Effects of soil water and heat relationship under various snow cover during freezing-thawing periods in Songnen Plain, China.

The results of the function models showed a trend of initial increase and subsequent decrease in the vertical profile.

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Under the NS treatment, as the soil depth increased, the coefficients of determination of the function models in the 20-, 40-, and 60-cm soil layers were consistent with those observed under the BL and exhibited an increasing trend.

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