Effects of Pisha sandstone application rate and microbial agents on soil nutrient dynamics and microbial characteristics in sandy soil.

Soil organic carbon showed highly significant positive correlations with available nitrogen ( r = 0.901, P < 0.01), available phosphorus ( r = 0.909, P < 0.01), bacterial count ( r = 0.479, P < 0.01), fungi count ( r = 0.468, P < 0.01), actinobacteria count ( r = 0.492, P < 0.01), urease activity ( r = 0.434, P < 0.05), invertase activity ( r = 0.417, P < 0.05), and acid phosphatase activity ( r = 0.400, P < 0.05).

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