Table 8.

Principal component analysis of crude protein and mineral elements.

Variable	Eigenvectors
	Non-stress					Stress
	PC1	PC2	PC3	PC4	PC5	PC1	PC2	PC3	PC4	PC5
CP	-0.02	-0.42	0.44	0.09	0.61	0.20	0.45	-0.06	-0.28	-0.24
Mg	0.55	-0.08	-0.11	0.13	0.27	0.51	0.25	-0.16	0.10	0.34
K	0.51	0.04	-0.12	-0.30	0.36	0.44	0.35	-0.32	-0.03	0.08
Cr	0.41	-0.11	-0.32	-0.33	-0.17	-0.04	0.22	0.48	-0.47	0.55
Zn	0.27	0.48	0.30	-0.16	-0.22	0.43	-0.32	-0.21	0.12	-0.06
Fe	0.34	-0.10	0.51	0.24	-0.27	0.38	-0.36	0.34	0.01	0.06
Pb	0.11	-0.13	-0.52	0.65	-0.05	-0.31	0.13	-0.37	0.41	0.31
Cu	0.17	0.52	0.16	0.51	0.12	-0.02	-0.43	-0.29	-0.14	0.59
Mn	.	.	.	.	.	-0.09	0.36	0.26	0.52	0.24
Se	-0.21	0.52	-0.19	-0.09	0.51	0.26	-0.08	0.45	0.46	-0.02
Eigenvalue	2.44	1.67	1.47	0.96	0.79	2.48	2.12	1.56	1.06	0.78
Difference	0.77	0.20	0.52	0.16	0.21	0.36	0.56	0.50	0.28	0.14
Proportion	27.12	18.57	16.36	10.64	8.82	24.83	21.18	15.61	10.62	7.84
Cumulative	27.12	45.69	62.05	72.69	81.51	24.83	46.01	61.62	72.24	80.08

P=Phosphorus, CP=Crude protein, Mg=Magnesium, K=Potassium, Cr=Chromium, Zn=Zinc, Fe=Iron, Pb=Lead, Cu=Copper, Mn=Manganese, Se= Selenium.