Table 5 Economic analysis of fertilizer treatment and tillage system effects on maize at current prices at Bompari in 2013 and 2014
From: Tillage and fertilizer effect on maize and soybean yields in the Guinea savanna zone of Ghana
Variable | 2013 | 2014 | ||||||
|---|---|---|---|---|---|---|---|---|
CT without fertilizer | CT with fertilizer | NT without fertilizer | NT with fertilizer | CT without fertilizer | CT with fertilizer | NT without fertilizer | NT with fertilizer | |
Output (grain yield of maize in kg ha−1) | 384 | 973 | 677 | 1608 | 507 | 2267 | 1013 | 3080 |
Grain price (US$ kg−1) | 0.41 | 0.41 | 0.41 | 0.41 | 0.39 | 0.39 | 0.39 | 0.39 |
Gross return (US$ ha−1) | 158.90 | 402.62 | 280.14 | 665.38 | 196.26 | 877.55 | 392.13 | 1192.26 |
Ploughing (US$ ha−1) | 51.72 | 51.72 | 0.00 | 0.00 | 56.45 | 56.45 | 0.00 | 0.00 |
Herbicide and application costs (US$ ha−1) | 0.00 | 0.00 | 31.38 | 31.38 | 0.00 | 0.00 | 32.26 | 32.26 |
Weed control (labour) (US$ ha−1) | 86.21 | 86.21 | 43.21 | 43.21 | 80.65 | 80.65 | 40.32 | 40.32 |
Fertilizer and application costs (US$ ha−1) | 0.00 | 190.52 | 0.00 | 190.52 | 0.00 | 162.10 | 0.00 | 162.10 |
Total variable cost (US$ ha−1) | 137.93 | 328.45 | 74.48 | 265.00 | 137.10 | 299.19 | 72.58 | 234.68 |
Net benefits (US$ ha−1) | 20.97 | 74.17 | 205.66 | 400.38 | 59.16 | 578.35 | 319.55 | 957.58 |
MRR (%) | 28 | 103 | 320 | 394 | ||||