Role of Pigeonpea Cultivation on Soil Fertility and Farming System Sustainability in Ghana

Table 2

Effect of crop sequence and N rate on (a) maize grain yield (kg ha⁻¹) and (b) weed biomass (kg ha⁻¹) associated with the maize crop at 8 weeks after planting on researcher-managed plots.

(a)  

Crop sequence	N rate (kg ha^−1)		Mean
	O	60
Speargrass fallow	1050	2848	1949
Cassava	3002	2738	2870
Pigeonpea	2422	2972	2697
Cowpea-maize-cowpea	1670	2328	1999
Mucuna-maize-mucuna	2970	4195	3582
Maize-maize-maize	1380	2128	1754
Mean	2082	2868

SED: crop sequence (CS) = 318.4; N rate (NR) = 115.3; CS × NR = 375.8.
P < F: CS = 0.001; NR = 0.001; CS × NR = 0.01.
Source [9].

(b)  

Crop sequence	N rate (kg ha^−1)		Mean
	O	60
Speargrass fallow	585	790	686
Cassava	270	300	285
Pigeonpea	390	500	445
Cowpea-maize-cowpea	325	395	360
Mucuna-maize-mucuna	300	345	323
Maize-maize-maize	240	430	335
Mean	351	460

SED: crop sequence (CS) = 65.9; N rate (NR) = 52.4; CS × NR = 112.1.
P < F: CS = 0.001; NR = 0.05; CS × NR = NS.
Source [9].