Effect of the Irrigation Interval and Nitrogen Rate on Yield and Yield Components of Onion (Allium cepa L.) at Arba Minch, Southern Ethiopia
Table 4
Interaction effect of the irrigation interval and N rate on growth parameters of onion.
Treatment
Plant height (cm)
Number of leaves per plant
Leaf length (cm)
Days to maturity
Irrigation interval (day)
N (kg·ha−1)
3
0
54.87fg
10.47e
44.06
95.00d
50
59.73cd
11.26d
48.40
98.00c
100
62.28bc
13.16a
50.06
104.66a
150
66.13a
13.40a
54.06
106.33a
6
0
56.53ef
10.43e
46.27
94.66d
50
58.53de
12.10c
47.53
96.33cd
100
61.76bc
12.66b
51.80
102.00b
150
64.20ab
12.33b
52.70
104.67a
9
0
51.46hi
8.00g
44.20
85.66e
50
53.93gh
9.03f
45.70
90.00e
100
55.90fg
9.25f
48.46
90.67e
150
57.00ef
9.40f
49.31
91.33e
12
0
43.80l
5.60l
37.20
81.66h
50
49.20l
6.56h
41.60
84.88g
100
51.76h
6.48h
45.33
85.33fg
150
52.36h
6.56h
46.53
86.66f
CD (<0.05)
0.99
0.18
NS
0.78
SEM (±)
1.88
0.06
2.23
1.11
CV (%)
2.44
2.58
3.16
1.15
Means followed by the same letter within a column are not significantly different at a 5% probability level according to Duncan’s multiple range tests, CD = critical difference, SEM = standard error of the mean, CV = coefficient of variation, and NS = nonsignificant.