Residual Nitrogen Contributions from Grain Legumes to the Growth and Development of Succeeding Maize Crop
Table 6
Interaction between previous crops and nitrogen fertilizer rates (kgN/ha) on dry weight of succeeding maize crop at 8 and 12 WAS at Samaru, Zaria during, Nigeria 1998 cropping season.
Treatments
Fertilizer rates (kg N ha−1)
Previous crops
0
40
80
120
8 weeks after sowing
Soyabean
43.8d
44.4d
56.0c
64.7b
Cowpea
35.2e
44.6d
55.4c
63.1b
Lablab
46.3d
58.2c
74.4ab
84.5a
Groundnut
39.2d
42.2d
61.0bc
67.3b
Previous maize
23.9f
35.7e
38.4de
49.2cd
Fallow
32.5ef
42.2d
56.4c
65.0b
12 weeks after sowing
Soyabean
109.2j
177.1hi
187.3gh
190.1fg
Cowpea
111.1j
173.2hi
218.1dc
223.0dc
Lablab
207.4ef
239.3cd
264.3ab
277.1a
Groundnut
123.31i
191.1fg
226.2dc
252.3bc
Previous maize
104.5j
138.1i
189.4gh
198.4fg
Fallow
119.0ij
181.2gh
213.1ef
254bc
Means followed by the same letter(s) within the same week are not statistically different at 5% level of significance (P ≤ 0.05).
