Research Article
Effect of the Irrigation Interval and Nitrogen Rate on Yield and Yield Components of Onion (Allium cepa L.) at Arba Minch, Southern Ethiopia
Table 8
Partial budget analysis in respect of irrigation and fertilizer N levels on marketable yield of onion.
| Treatment combination | Unadjusted marketable yield (t ha−1) | Adjusted marketable yield (t ha−1) | Gross benefit (Birr ha−1) | Total variable cost (Birr ha−1) | Net benefit (Birr ha−1) | Cost dominance |
| Ir4N0 | 15.14 | 13.63 | 163512 | 57872 | 105640 | | Ir4N1 | 16.51 | 14.86 | 178308 | 58527 | 119781 | | Ir4N2 | 18.21 | 16.39 | 196668 | 59182 | 137486 | | Ir4N3 | 17.92 | 16.13 | 193536 | 59837 | 133699 | D | Ir3N0 | 18.60 | 16.74 | 200880 | 64872 | 136008 | D | Ir3N1 | 22.61 | 20.35 | 244188 | 65260 | 178928 | | Ir3N2 | 25.99 | 23.39 | 280692 | 66182 | 214510 | | Ir3N3 | 25.87 | 23.28 | 279396 | 66837 | 212559 | D | Ir2N0 | 23.23 | 20.91 | 250884 | 72872 | 178012 | D | Ir2N1 | 28.31 | 25.48 | 305748 | 73527 | 232221 | | Ir2N2 | 33.57 | 30.21 | 362640 | 74182 | 288458 | | Ir2N3 | 33.20 | 29.88 | 358560 | 74834 | 283726 | D | Ir1N0 | 21.54 | 19.39 | 232632 | 105872 | 126760 | D | Ir1N1 | 28.86 | 25.97 | 311688 | 106527 | 205161 | D | Ir1N2 | 33.70 | 30.33 | 363960 | 107182 | 256778 | D | Ir1N3 | 34.12 | 30.71 | 368496 | 107837 | 260659 | D |
|
|
Ir1 = 3 days irrigation interval; Ir2 = 6 days irrigation interval; Ir3 = 9 days irrigation interval; Ir4 = 12 days irrigation interval; N0 = no nitrogen fertilizer; N1 = 50 kg nitrogen; N2 = 100 kg nitrogen; N3 = 150 kg nitrogen; D = dominated.
|