For different soil depths, the amplitude of temperature daily variation can be approximated as an exponential function of the depth.
一日内地温变幅与深度关系可拟合成指数函数。
With the increase of soil depth, daily variation amplitude of soil temperature decreases.
随着土壤深度的增加，地温日变幅逐渐减小。
The daily variation of CH4 emission in late rice paddy field was basically consistent with the daily variation of air temperature.
结果稻田ch 4排放通量的日变化与气温日变化基本一致。
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