Table 8 Marginal rate of return analysis of non-dominated maize grain yield response for different N fertilizer rates
N fertilizer rate (kg ha−1) | Gross margin (Birr ha−1) | Variable cost (Birr ha−1) | Marginal increase in gross margin (Birr ha−1) | Marginal increase in variable cost (Birr ha−1) | MRR (%) |
|---|---|---|---|---|---|
90 | 2863.11 | 512.26 | 201.48 | 117.54 | 171.4 |
60 | 2661.63 | 394.72 | 301.22 | 117.36 | 256.7 |
30 | 2360.41 | 277.36 | 167.04 | 277.36 | 60.22 |
0 | 2193.37 | 0 | – | – | – |