Averaged moisture above 60 cm revealed a small increase or little change in spring, with the maximum in summer and followed by a decreasing trend in autumn under all four treatments.
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Profile distribution of CO<sub>2</sub> in an arid saline-alkali soil with gypsum and wheat straw amendments: a two-year incubation experiment.
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The sentences
Soil CO 2 generally displayed an increasing trend in spring and summer, followed by a decreasing trend in autumn and winter.