Response of Sorghum (Sorghum bicolor L.) to Residual Phosphate in Soybean-Sorghum and Maize-Sorghum Crop Rotation Schemes on Two Contrasting Nigerian Alfisols

Table 5

Influence of soils and P-sources on dry biomass yield (g/pot) and relative agronomic efficiency (RAE) (%) of maize/soybean plants in the first cropping.

Treatment		Dry biomass (g/pot)	RAE (%)
Maize plant
Strongly acidic	Control	4.20
	Morocco RP	12.40	88.17
	Sokoto RP	8.57	46.99
	Single SP	13.50	100
Slightly acidic	Control	19.13
	Morocco RP	24.47	210.24
	Sokoto RP	16.73	ND
	Single SP	21.67	100
LSD (5%)		3.38
Soybean plant
Strongly acidic	Control	4.65
	Morocco RP	9.57	139.77
	Sokoto RP	4.02	ND
	Single SP	8.17	100
Slightly acidic	Control	11.83
	Morocco RP	13.26	36.2
	Sokoto RP	5.11	ND
	Single SP	15.78	100
LSD (5%)		3.53

RAE = relative agronomic efficiency of the Phosphorus- (P-) sources = [((yield of GRP − yield of Control)/(yield of SSP − yield of Control)) × 100]%.
NS = nonsignificantly different at .
ND = not determined.