Fig. 7
From: Soil quality changes in the Horqin sandy area under different ecological restoration patterns
Correlation heatmap of the soil physicochemical properties, PSD, and SQI. SOM: soil organic matter; TN: total nitrogen; TP: total phosphorus; TK: total potassium; C/N: organic carbon/total nitrogen; HN: alkali-hydrolyzed nitrogen; AP: available phosphorus; AK: rapidly available potassium; sand: soil particles of 0.05–2 mm; silt: soil particles of 0.002–0.05 mm; clay: soil particles below 0.002 mm; D: soil fractal dimension; SQI: soil quality index. **level of significance is 0.01; *level of significance is 0.05.
