Table 4 Economic analysis of fertilizer treatments and tillage systems effects on soybean at current prices at Doggoh 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 (yield of soybean in kg ha−1) | 293 | 493 | 366 | 547 | 567 | 993 | 980 | 1380 |
Grain price (US$ kg−1) | 0.69 | 0.69 | 0.69 | 0.69 | 0.77 | 0.77 | 0.77 | 0.77 |
Gross return (US$ ha−1) | 202.07 | 340.00 | 252.41 | 377,24 | 438.97 | 768.77 | 758.71 | 1068.39 |
Ploughing (US$ ha−1) | 51.72 | 51.72 | 0.00 | 0.00 | 48.39 | 48.39 | 0.00 | 0.00 |
Herbicide and application costs (US$ ha−1) | 0.00 | 0.00 | 31.38 | 31.38 | 0.00 | 0.00 | 32.93 | 32.93 |
Weed control (labour) (US$ ha−1) | 86.21 | 86.21 | 43.10 | 43.10 | 80.65 | 80.65 | 40.32 | 40.32 |
Fertilizer and application costs (US$ ha−1) | 0.00 | 229.31 | 0.00 | 229.31 | 0.00 | 215.96 | 0.00 | 215.96 |
Total variable cost (US$ ha−1) | 137.93 | 367.24 | 74.48 | 303.79 | 129.03 | 344.99 | 73.25 | 289.21 |
Net benefits (US$ ha−1) | 64.14 | (27.24) | 177.93 | 73.45 | 309.94 | 425.23 | 686.13 | 781.29 |
MRR (%) | (40) | (46) | 53 | 44 | ||||