Response and economic feasibility of maize (Zea mays L.) to P fertilization in acidic Alfisols of North-western Ethiopia

Environmental Systems Research

Table 5 Partial budget and dominance analysis of maize grain yield response for different P fertilizer rates

P fertilizer rate (kg ha⁻¹)	TSP (kg ha⁻¹)	Grain yield (kg ha⁻¹)	Gross return (Birr ha⁻¹)	Variable cost (Birr ha⁻¹)			Gross margin (Birr ha⁻¹)	Cost dominance^a	MRR (%)
P fertilizer rate (kg ha⁻¹)	TSP (kg ha⁻¹)	Grain yield (kg ha⁻¹)	Gross return (Birr ha⁻¹)	Fertilizer	Fertilizer application	Total	Gross margin (Birr ha⁻¹)	Cost dominance^a	MRR (%)
0	0.0	4275.4	2565.3	0.0	0.0	0.0	2565.3	–
30	65.2	4918.4	2951.0	145.0	80.0	230.0	2721.1	ND	67.8
60	130.4	5167.9	3100.7	299.9	80.0	379.9	2720.8	D	–
90	195.7	5346.8	3208.0	450.1	80.0	530.1	2677.9	D	–
150	326.1	5240.3	3144.1	750.0	80.0	830.0	2314.1	D	–

^aNon-dominated (ND) are treatments that gave higher gross margin than treatments with lower N fertilizer rates; dominated (D) are treatments that gave lower gross margin than treatments with lower N fertilizer rates