Table 8.

Sum of squares, mean squares and F statistics from Analysis of Covariance indicating the sources of variation in total Land Equivalent Ratios (LER) of maize-grain legume intercrops under different spatial arrangement and selected measured soil properties in the southern Guinea savanna (SGS) and northern Guinea savanna (NGS) of northern Ghana.

	SGS					NGS
Source of variation	d.f.	s.s.	m.s.	v.r.	F pr.	d.f.	s.s.	m.s.	v.r.	F pr.
Block stratum
Legume species	2	0.20	0.10	1.61	0.216	2	0.01	0.00	0.08	0.924
Covariates	2	0.28	0.14	2.26	0.121	2	2.44	1.22	21.53	<0.001
Total N	1	0.28	0.28	4.50	0.042	1	1.82	1.82	32.08	<0.001
Avail. P	1	0.00	0.00	0.03	0.874	1	0.62	0.62	10.97	0.002
Residual	31	1.90	0.06	3.74		31	1.76	0.06	2.43
Block.*Units* stratum
Arrangement	2	1.52	0.76	46.36	<0.001	2	1.40	0.70	29.98	<0.001
Arrangement.Legume species	4	0.08	0.02	1.27	0.291	4	0.07	0.02	0.70	0.596
Residual	66	1.08	0.02			66	1.54	0.02
Total	107	5.05				107	7.23