Effects of Altitude, Slope Aspect, and Soil Depth on Soil Properties and Herbaceous Root Distribution in Honghe Hani Rice Terraces.

In contrast, surface bulk density was not significantly correlated with available phosphorus or total potassium (r = 0.21–0.47) but exhibited a strong positive correlation with pH (r = 0.98) and significant to highly significant negative correlations with the remaining variables (r = −0.90 to −0.99).

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