Table 5.
Pearson correlation coefficients (r) and test of significance (n = 18)
| pH | SOC | Ca | ECEC | Fed | Ald | Mnd | Feo | Alo | Mno | ill | kao | Clay | Silt | Sand | Kf DIU | Kf LIN | Kf MON | Kf CLT | Kf IPU | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| pH | 1.00 | |||||||||||||||||||
| SOC | 0.55a | 1.00c | ||||||||||||||||||
| Ca | 0.71c | 0.74c | 1.00 | |||||||||||||||||
| ECEC | 0.64b | 0.82c | 0.92c | 1.00 | ||||||||||||||||
| Fed | 0.41 | 0.51a | 0.36 | 0.41 | 1.00 | |||||||||||||||
| Ald | 0.50a | 0.38 | 0.20 | 0.23 | 0.55a | 1.00 | ||||||||||||||
| Mnd | 0.42 | 0.70c | 0.49a | 0.53a | 0.94c | 0.43 | 1.00 | |||||||||||||
| Feo | 0.33 | 0.70c | 0.45 | 0.40 | 0.57a | 0.20 | 0.74a | 1.00 | ||||||||||||
| Alo | 0.04 | 0.05 | − 0.13 | − 0.15 | 0.57a | 0.39 | 0.51 | 0.29 | 1.00 | |||||||||||
| Mno | 0.56a | 0.88c | 0.66b | 0.62b | 0.47 | 0.42 | 0.68a | 0.82c | 0.19 | 1.00 | ||||||||||
| ill | 0.25 | 0.02 | 0.33 | 0.20 | − 0.22 | − 0.08 | − 0.21 | − 0.23 | − 0.08 | − 0.07 | 1.00 | |||||||||
| kao | − 0.19 | 0.01 | − 0.30 | − 0.17 | 0.30 | 0.21 | 0.27 | 0.18 | 0.18 | 0.10 | − 0.98c | 1.00 | ||||||||
| %clay | 0.62b | 0.81c | 0.59b | 0.70c | 0.71c | 0.60a | 0.75c | 0.56a | 0.04 | 0.69c | − 0.22 | 0.29 | 1.00 | |||||||
| %silt | 0.77c | 0.82c | 0.75c | 0.79c | 0.67c | 0.49 | 0.70c | 0.55a | − 0.01 | 0.64c | 0.08 | − 0.04 | 0.89c | 1.00 | ||||||
| %sand | − 0.75c | − 0.82c | − 0.75c | − 0.79c | − 0.63c | − 0.46 | − 0.67c | 0.52a | 0.05 | − 0.62c | − 0.09 | 0.05 | − 0.88c | − 0.99c | 1.00 | |||||
| Kf DIU | 0.63b | 0.85c | 0.80c | 0.82c | 0.31 | 0.27 | 0.46 | 0.60b | − 0.15 | 0.80c | − 0.04 | 0.03 | 0.69a | 0.73c | − 0.75b | 1.00 | ||||
| Kf LIN | 0.63b | 0.90c | 0.80c | 0.82c | 0.36 | 0.30 | 0.54a | 0.65c | − 0.10 | 0.85c | − 0.06 | 0.06 | 0.73b | 0.75c | − 0.76b | 0.99 | 1.00 | |||
| Kf MON | 0.55a | 0.79c | 0.74c | 0.72c | 0.15 | 0.25 | 0.35a | 0.59b | − 0.16 | 0.84a | − 0.01 | 0.00 | 0.58a | 0.57a | − 0.57 | 0.94 | 0.94 | 1.00 | ||
| Kf CLT | 0.58a | 0.92c | 0.78 | 0.82c | 0.41 | 0.31 | 0.60a | 0.68c | − 0.01 | 0.87c | − 0.09 | 0.11 | 0.73c | 0.74c | − 0.75c | 0.97 | 0.99 | 0.91 | 1.00 | |
| Kf IPU | 0.51a | 0.83c | 0.81c | 0.80c | 0.31 | 0.15 | 0.50a | 0.59b | − 0.24 | 0.76c | − 0.05 | 0.03 | 0.64c | 0.71c | − 0.73b | 0.92 | 0.94 | 0.87 | 0.94 | 1.00 |
| Kd DIU | 0.70c | 0.89c | 0.82c | 0.84c | 0.34 | 0.31 | 0.49a | 0.60b | − 0.13 | 0.82c | 0.08 | − 0.07 | 0.71c | 0.79c | − 0.80b | 0.98c | 0.98 | 0.93 | 0.96 | 0.92 |
| Kd LIN | 0.64b | 0.91c | 0.80c | 0.82c | 0.37 | 0.33 | 0.56a | 0.66c | − 0.07 | 0.88c | − 0.03 | 0.04 | 0.74c | 0.76c | − 0.77b | 0.97 | 0.99c | 0.94 | 0.99 | 0.94 |
| Kd MON | 0.57a | 0.88c | 0.78c | 0.79c | 0.26 | 0.29 | 0.47a | 0.64b | − 0.13 | 0.88c | − 0.02 | 0.02 | 0.67c | 0.67c | − 0.68b | 0.97 | 0.98 | 0.98c | 0.97 | 0.93 |
| Kd CLT | 0.59b | 0.94c | 0.79c | 0.83c | 0.42 | 0.32 | 0.61a | 0.67c | − 0.02 | 0.88c | − 0.05 | 0.07 | 0.74c | 0.76c | − 0.77b | 0.95 | 0.98 | 0.91 | 1.00c | 0.94 |
| Kd IPU | 0.51a | 0.90c | 0.79c | 0.82c | 0.34 | 0.21 | 0.54a | 0.61b | − 0.18 | 0.81c | − 0.03 | 0.03 | 0.69c | 0.74c | − 0.76b | 0.94 | 0.96 | 0.89 | 0.96 | 0.98c |
Lowercase letter a, b and c indicate significance at p < 0.05, p < 0.01 and p < 0.001, respectively