Research Article
Vermicompost and NPSZnB Fertilizer Levels on Maize (Zea mays L.) Growth, Yield Component, and Yield at Guto Gida, Western Ethiopia
Table 8
Partial budget analysis of maize yield for determination of the economically profitable level of vermicompost and NPSZnB fertilizer rate.
| | Treatment | V/compost (t·ha−1) | NPS (kg·ha−1) | Grain yield (t·ha−1) | Adjusted grain yield (t·ha−1) | Gross benefit (ETB·ha−1) | TVC (ETB·ha−1) | Net benefit (ETB·ha−1) | MRR% |
| | T1 | 0 | 0 | 6.96 | 6.26 | 125226 | 0.00 | 125226.00 | — | | T2 | 0 | 50 | 7.03 | 6.33 | 126540 | 890.00 | 125650.00 | 47.64 | | T3 | 0 | 100 | 7.24 | 6.52 | 130320 | 1780.00 | 128540.00 | 324.72 | | T4 | 0 | 150 | 7.47 | 6.73 | 134514 | 2670.00 | 131844.00 | 371.24 | | T5 | 2.5 | 0 | 7.22 | 6.50 | 130014 | 750.00 | 129264.00 | — | | T6 | 2.5 | 50 | 7.32 | 6.59 | 131760 | 1640.00 | 130120.00 | 96.18 | | T7 | 2.5 | 100 | 7.75 | 6.98 | 139500 | 2530.00 | 136970.00 | 769.66 | | T8 | 2.5 | 150 | 7.78 | 7.00 | 140076 | 3420.00 | 136656.00 | D | | T9 | 5.0 | 0 | 7.29 | 6.56 | 131166 | 1500.00 | 129666.00 | — | | T10 | 5.0 | 50 | 7.54 | 6.79 | 135774 | 2390.00 | 133384.00 | 417.75 | | T11 | 5.0 | 100 | 7.99 | 7.19 | 143766 | 3280.00 | 140486.00 | 797.98 | | T12 | 5.0 | 150 | 7.97 | 7.18 | 143532 | 4170.00 | 139362.00 | D | | T13 | 7.5 | 0 | 7.30 | 6.57 | 131400 | 2250.00 | 129150.00 | — | | T14 | 7.5 | 50 | 7.71 | 6.94 | 138780 | 3140.00 | 135640.00 | 729.21 | | T15 | 7.5 | 100 | 7.97 | 7.18 | 143514 | 4030.00 | 139484.00 | 431.91 | | T16 | 7.5 | 150 | 8.03 | 7.23 | 144540 | 4920.00 | 139620.00 | 13.60 |
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Application costs of vermicompost and mineral NPSZnB fertilizer = 30 ETB quintal−1; unit cost of NPSZnB fertilizer = 17.5 ETB·kg−1; maize price 20 ETB·kg−1; ETB = Ethiopian birr; NPSZnB = fertilizer containing 17.8%N, 37.5%P2O5 7%S, 2.2%Zn, and 0.1%B; TVC = total variable cost; MRR = marginal rate of return; and D = dominated.
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