The range and C v of the soil temperature across treatments showed a trend of decreasing then increasing as the reproductive period progressed, with the largest range (4.73 °C) and C v (5.58%) observed at the fourth trifoliate leaf stage.
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Impacts of Various Straw Mulching Strategies on Soil Water, Nutrients, Thermal Regimes, and Yield in Wheat-Soybean Rotation Systems.
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The sentences
The variation in the soil temperature (range and C v ) exhibited a clear trend: both metrics increased, then decreased, and then increased again as the crop developed.