Analysis of Soil-Vegetation Interrelationships in a South-Southern Secondary Forest of Nigeria

Table 3

Ordinary components matrix of soil properties^a.

	Principal components
Soil properties	1	2	3	4	5
Exch. K	.709	.146	.354	.263	−.026
Base saturation	.672	−.417	−.240	.363	−.070
Exch. Na	.672	.508	−.213	.368	.220
Organic matter	.659	.229	.153	−.231	−.597
Total nitrogen	.616	.361	−.029	−.522	−.118
pH	−.507	−.025	−.446	.419	.018
Av. P	−.327	.767	−.053	−.204	−.159
Exch. Mg	.364	.633	−.036	.102	.504
Sand content	.256	−.618	−.147	−.532	.306
Silt content	.105	.317	−.728	.018	.115
Exch. Ca	.427	−.293	.639	.170	.364
Clay content	−.469	.310	.615	.360	−.198
CEC	−.381	.353	.343	−.358	.473
Eigenvalues	3.34	2.14	1.91	1.46	1.21
% Variance	25.70	18.57	14.70	11.22	9.28
Cumulative explanation	25.70	44.27	58.97	70.19	79.46

^aVariables underlined with eigenvectors (coefficients) ≥ ±0.70 are considered significant.