Effects of Varieties and Nitrogen Fertilizer on Yield and Yield Components of Maize on Farmers Field in Mid Altitude Areas of Western Ethiopia

Table 10

Mean interaction effects of varieties and nitrogen rate on partial budget and marginal rate of return mean grain yield of maize at Bako Tibe, western Ethiopia.

Items	Maize varieties + nitrogen kg ha^−1
	BH-543	BH-540; (50% RR)	BH-543; (50% RR)	BH-660 (50% RR)	BH-661 (50% RR)	BH-140; (50% RR)	BH-540; (100% RR)	BH-543; (100% RR)	BH-661; (100% RR)	BH-660; (100% RR)	BH-140; (100% RR)
Grain yield kg ha^−1	3029	3663	3755	4029	4859	3535	4139	4012	5199	4116	3981
Adjusted grain yield kg ha^−1	2726	3297	3380	3626	4373	3182	3725	3611	4679	3704	3583
Gross field benefit EB ha^−1	10223	12363	12673	13598	16399	11931	13969	13541	17547	13892	13436
Total field cost EB ha^−1	0	1388	1388	1388	1388	1388	4050	4050	4050	4050	4050
Net benefit EB ha^−1	10223	10975	11285	12210	15011	10543	9919	9491	13497	9842	9386
Values to cost ratio		7.91	8.13	8.80	10.81	7.60	2.45	2.34	3.33	2.43	2.32
Marginal rate of return (MRR)		54.16	76.53	143.16	344.97

Note. Grain price = EB 3.75 kg⁻¹, labour cost = EB 21.00/day, yield was down adjusted with 10% coefficient, cost of urea = EB 12.75 kg⁻¹ DAP = EB 15.00 kg⁻¹, RR = recommended rate of nitrogen fertilizer (110 kg N ha⁻¹), and D = dominated treatment.