Morphological Variation and Ecological Structure of Iroko (Milicia excelsa Welw. C.C. Berg) Populations across Different Biogeographical Zones in Benin

Table 3

Results from principal component analysis (PCA) of environmental data.

	PC1		PC2
	Coefficient	Loading	Coefficient	Loading
Clay	0.327	0.805	−.400	0.476
Silt	0.195	0.483	0.498	0.599
Sand	0.388	0.954	0.051	0.060
N	0.013	0.592	−0.015	−0.336
M.O	0.192	0.481	0.105	0.127
Ca	0.392	0.964	0.121	0.144
Mg	0.389	0.960	0.063	0.075
Na	−0.203	−0.847	−0.032	−0.064
Cat.	0.397	0.975	0.101	0.120
CEC	0.397	0.976	−0.028	−0.033
Rainfall	−0.082	−0.201	−0.740	0.881
Eigenvalue	6.048		1.417
Variance (%)	65.112		15.252