Soil Acidification Can Be Improved under Different Long-Term Fertilization Regimes in a Sweetpotato-Wheat Rotation System.

Correlation Analysis of Soil Physicochemical Properties Pearson correlation analysis reveals highly significant positive correlations between the soil pH and pHBC, as well as between the soil pH and CEC.

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Nevertheless, the variations among the fertilization treatments did not reach statistical significance. 2.5.

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Soil pH Changes under Different Fertilization Treatments Compared to the initial soil pH of 6.48, the soil pH in all the N-related fertilization treatments, except for the CK and PK treatments, exhibited a decreasing trend from 2012 to 2020 ( Figure 1 ).

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