Effects of Nitrogen Rates and Time of Application on Yield of Maize: Rainfall Variability Influenced Time of N Application

Table 1

Analysis of variance for yield and yield components of maize as influenced by N rates, time of application, and the interaction effects in 2013 and 2014 at Bako, Western Ethiopia.

Sources of variations	D.f.	probability ()
		Biomass	Grain yield	HI	AE
Year (Yr)	1	<.001	<.001	<.001	<.001
Nitrogen (N)	3	<.001	<.001	0.012	<.001
Time of application (TA)	3	0.277	0.083	0.81	0.063
Yr × N	3	0.193	0.001	0.008	<.001
Yr × TA	3	0.093	0.054	0.126	0.106
N × TA	9	<.001	0.047	0.004	0.164
Yr × N × TA	9	<.001	0.024	0.062	0.159
Replication	2	0.155	0.116	0.271	0.121
Residual	62	—	—	—	—
Total	95
SE		1.893	0.724	3.36	0.0113
CV (%)		8.6	7.6	7.6	8.6

HI: harvest index; AE: agronomic efficiency.