TABLE 8.

Stepwise regression variances analysis of different soil biological properties in cauliflower-cowpea-okra cropping system.

Source	DF	Seq SS	Contri- bution	Adj SS	Adj MS	F-value	P-value	Coef	SE Coef
Regression	4	394.54	99.74%	394.54	98.63	966.30	0.00	11.97	3.18
BP	1	388.07	44.8%	4.05	4.05	39.71	0.00	1.63	0.26
MBC	1	4.74	22.17%	2.51	2.51	24.61	0.00	0.76	0.15
MBN	1	1.04	18.67%	1.49	1.49	14.62	0.00	3.49	0.91
MBP	1	0.69	14.18%	0.69	0.69	6.80	0.03	-0.08	0.03
Error	10	1.02	0.26%	1.02	0.10
Total	14	395.55	100.00%

Stepwise selection of terms: α to enter = 0.15, α to remove = 0.15. S, standard error of the regression; PRESS, predicted residual error sum of squares; Seq SS, sequential sums of squares; Adj SS, adjusted sum of squares; Adj MS, adjusted mean squares; SE Coef = Standard error of the coefficient.