Residual Nitrogen Contributions from Grain Legumes to the Growth and Development of Succeeding Maize Crop

Table 2

Effect of previous legume crops on the height (cm) of succeeding maize crop using different N-fertilizer levels at Samaru, Zaria Nigeria during 1988 cropping season.

Treatment	Weeks after sowing
	8	12
Previous legume crop (P)
Soyabean	83.91c	175.76c
Cowpea	88.40c	118.97e
Lablab	121.11a	215.63a
Groundnut	104.02b	190.51b
Previous maize	82.81c	173.32cd
Fallow	92.92bc	182.13bc
Nitrogen (N kg ha^−1)
0	64.81d	148.47d
40	85.30c	190.26c
80	114.11b	200.00b
120	118.01a	207.48a
Interaction (P × N)	NS	*

Means followed by the same letter(s) within the same treatment group and week are not statistically different at 5% level of significance.
NS: Not significant.
*: Significant at 5% level of significance.