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Values of the three extracted factor loadings for nine elements
| Elements | PC1 | PC2 |
|---|---|---|
| pH H2O | 0.480 | − 0.762* |
| pH KCl | 0.215 | − 0.894* |
| Total organic carbon | − 0.865* | − 0.275 |
| Total nitrogen | − 0.864* | − 0.232 |
| Total phosphorus | − 0.211 | − 0.161 |
| Available phosphorus | − 0.605 | − 0.312 |
| Alkaline phosphatase | − 0.813* | 0.052 |
| Acid phosphatase | − 0.767* | 0.208 |
| Clay | − 0.591 | − 0.278 |
| Variation (%) | 42.11 | 19.53 |
*Statistically significant
