Effect of the Irrigation Interval and Nitrogen Rate on Yield and Yield Components of Onion (Allium cepa L.) at Arba Minch, Southern Ethiopia

Table 3

Effect of the irrigation interval and N rate on growth parameters of onion (main effects).

Treatment	Plant height (cm)	Leaf number per plant	Leaf length (cm)	Days to maturity
Irrigation interval (day)
3	60.80a	12.07a	49.15^a	101.00a
6	60.25a	11.88a	49.82^a	99.42b
9	54.57b	8.92b	46.92^b	89.42c
12	49.26c	6.30c	42.66^c	84.42d
CD(<0.05)	1.95	0.37	1.66	0.82
SEM (±)	3.79	0.14	2.75	0.66
CV (%)	3.46	3.76	3.52	0.87
N (kg·ha^−1)
0	51.67d	8.63c	43.18^d	89.25d
50	55.40c	9.74b	45.80^c	92.08c
100	57.91b	10.39a	48.92^b	95.67b
150	59.92a	10.42a	50.65^a	97.25a
CD (<0.05)	0.99	0.18	1.22	0.95
SEM (±)	1.40	0.05	2.06	1.20
CV (%)	2.11	2.19	3.07	1.21

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, and CV = coefficient of variation.