The soil chemical properties of reclaimed land in an arid grassland dump in an opencast mining area in China.

There were extremely significant positive correlations between SOM and STN and SAK ( P < 0.01), and a significant positive correlation between SOM and SAP, with correlation coefficients of 0.90, 0.88, and 0.69, respectively.

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In the 0–40 cm soil layers, there were significant or highly significant positive correlations between SOM and the other nutrient indicators, and negative correlations with the soil pH, indicating that SOM is the core element associated with the chemical transformation of soil.

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