Table 3.

Eigenvectors and eigenvalues of the first three principal components of 8 traits.

Variables	PC1	PC2	PC3
Eigenvalue	3.30	1.39	1.09
Variation (%)	41.2	17.4	13.6
Cumulative (%)	41.2	58.6	72.2
Fe	0.10	−0.01	0.91
Zn	0.14	0.75	0.19
B	0.74	0.02	−0.27
Cu	−0.45	0.48	−0.37
Mn	0.17	0.78	0.05
SL	0.93	−0.06	−0.12
SW	0.93	0.02	0.01
100-SW	0.87	0.00038	0.14