Research Article
Degradation Rate/Vulnerability Potential and Fertility Status of Luvisols in the Mandara Mountains (Far-North Cameroon)
Table 9
Spearman correlation matrix for linear relationships between soil properties in the cultivated plot.
| Variables | Sand | Silt | Clay | pHH2O | pHKCl | OC | OM | N | C/N | Ca | Mg | K | Na | CEC | P | BD | Ca/Mg | Mg/K | ISS | SBE | V |
| Sand | 1 | | | | | | | | | | | | | | | | | | | | | Silt | −0.618 | 1 | | | | | | | | | | | | | | | | | | | | Clay | −0.814 | 0.188 | 1 | | | | | | | | | | | | | | | | | | | pHH2O | 0.188 | 0.268 | −0.144 | 1 | | | | | | | | | | | | | | | | | | pHKCl | 0.062 | 0.338 | −0.034 | 0.939 | 1 | | | | | | | | | | | | | | | | | OC | −0.295 | 0.503 | 0.092 | −0.097 | −0.018 | 1 | | | | | | | | | | | | | | | | OM | −0.295 | 0.503 | 0.092 | −0.097 | −0.018 | 1.000 | 1 | | | | | | | | | | | | | | | N | −0.284 | 0.137 | 0.267 | 0.378 | 0.560 | 0.170 | 0.170 | 1 | | | | | | | | | | | | | | C/N | −0.074 | 0.416 | −0.135 | −0.340 | −0.329 | 0.721 | 0.721 | −0.480 | 1 | | | | | | | | | | | | | Ca | −0.120 | 0.012 | 0.340 | 0.619 | 0.749 | −0.140 | −0.140 | 0.622 | −0.529 | 1 | | | | | | | | | | | | Mg | 0.062 | −0.118 | 0.135 | 0.492 | 0.366 | −0.321 | −0.321 | 0.055 | −0.455 | 0.304 | 1 | | | | | | | | | | | K | 0.292 | 0.177 | −0.255 | 0.746 | 0.749 | 0.136 | 0.136 | 0.211 | −0.019 | 0.675 | 0.142 | 1 | | | | | | | | | | Na | 0.442 | −0.129 | −0.331 | 0.589 | 0.597 | 0.013 | 0.013 | 0.209 | −0.189 | 0.659 | 0.328 | 0.881 | 1 | | | | | | | | | CEC | −0.130 | 0.374 | 0.169 | 0.805 | 0.865 | 0.310 | 0.310 | 0.723 | −0.237 | 0.640 | 0.340 | 0.551 | 0.418 | 1 | | | | | | | | P | −0.074 | 0.031 | 0.092 | 0.363 | 0.584 | −0.201 | −0.201 | 0.768 | −0.614 | 0.613 | 0.109 | 0.173 | 0.272 | 0.543 | 1 | | | | | | | BD | 0.105 | 0.043 | −0.141 | 0.073 | −0.159 | 0.285 | 0.285 | −0.286 | 0.248 | −0.438 | 0.552 | −0.148 | −0.051 | 0.067 | −0.511 | 1 | | | | | | Ca/Mg | 0.074 | 0.043 | −0.049 | 0.073 | 0.213 | 0.164 | 0.164 | 0.188 | 0.212 | 0.347 | −0.636 | 0.475 | 0.227 | 0.055 | 0.030 | −0.673 | 1 | | | | | Mg/K | −0.363 | −0.031 | 0.306 | −0.286 | −0.433 | −0.188 | −0.188 | −0.122 | −0.224 | −0.432 | 0.455 | −0.710 | −0.568 | −0.225 | −0.231 | 0.588 | −0.806 | 1 | | | | ISS | −0.111 | 0.404 | −0.067 | −0.152 | −0.098 | 0.964 | 0.964 | 0.012 | 0.830 | −0.280 | −0.418 | 0.117 | −0.025 | 0.182 | −0.328 | 0.285 | 0.248 | −0.273 | 1 | | | SBE | −0.037 | 0.056 | 0.245 | 0.815 | 0.817 | −0.261 | −0.261 | 0.462 | −0.576 | 0.857 | 0.709 | 0.630 | 0.631 | 0.693 | 0.456 | −0.018 | −0.018 | −0.115 | −0.394 | 1 | | V | 0.172 | −0.416 | 0.086 | 0.043 | −0.067 | −0.588 | −0.588 | −0.383 | −0.382 | 0.195 | 0.709 | 0.049 | 0.328 | −0.274 | −0.103 | 0.212 | −0.455 | 0.297 | −0.624 | 0.418 | 1 |
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Significant at ; SBE: sum of exchangeable bases; ISS: soil aggregate stability index; BD: bulk density. |