Table 4. Economics for rice production per hectare (two years’ pooled data).
| Treatment combinations | Additional cost due to treatment (USD·ha-1) | Gross return (USD·ha-1) | Net return (USD·ha-1) | B:C ratio | Economic efficiency (USD·day-1ha-1) |
|---|---|---|---|---|---|
| Fert100×Weedy | 63 | 1047 | 485 | 1.86 | 5.27 |
| ×Herbicide | 117 | 1186 | 570 | 1.93 | 6.20 |
| ×Integrated | 178 | 1282 | 605 | 1.89 | 6.57 |
| Fert75-VC25×Weedy | 83 | 1054 | 472 | 1.81 | 5.13 |
| ×Herbicide | 137 | 1218 | 581 | 1.91 | 6.31 |
| ×Integrated | 198 | 1327 | 629 | 1.90 | 6.84 |
| Fert75-FYM25×Weedy | 83 | 1043 | 460 | 1.79 | 5.00 |
| ×Herbicide | 137 | 1256 | 620 | 1.97 | 6.74 |
| ×Integrated | 198 | 1432 | 734 | 2.05 | 7.99 |
| Fert75-BSM25×Weedy | 129 | 1162 | 534 | 1.85 | 5.80 |
| ×Herbicide | 183 | 1298 | 616 | 1.90 | 6.69 |
| ×Integrated | 244 | 1482 | 739 | 1.99 | 8.03 |
| Fert75-NC25×Weedy | 166 | 1032 | 366 | 1.55 | 3.99 |
| ×Herbicide | 220 | 1226 | 507 | 1.70 | 5.51 |
| ×Integrated | 281 | 1386 | 605 | 1.78 | 6.59 |
N, nitrogen; P, phosphorus; K, potassium; VC, vermicompost; FYM, farmyard manure; BSM, brassicaceous seed meal; NC, neem cake; Fert100, full dose of N,P and K through fertilizer; Fert75-VC25, 75% of N and 100% of P and K through fertilizer with 25% N through VC; Fert75-FYM25, 75% of N and 100% of P and K through fertilizer with 25% N through FYM; Fert75-BSM25, 75% of N and 100% of P and K through fertilizer with 25% N through BSM; Fert75-NC25, 75% of N and 100% of P and K through fertilizer with 25% N through NC; Weedy, no weeding; Herbicide, bispyribac-sodium 25 g/ha at 15 DAT fbmetsulfuron methyl + chlorimuron ethyl (2+2) g/ha at 30 DAT; Integrated, bensulfuron methyl + pretilachlor (60+600) g/ha at 5 DAT fb MW at 30 DAT; DAT, days after transplanting; Within year, nutrient and weed management, numbers followed by different letter indicate significant differences at p ≤0.05 (otherwise statistically at par). ns, non-significant (p> 0.05); *, ** and *** indicate significant at p< 0.05, 0.01 and 0.001;Respectivelycost of urea: 0.107 USD·kg-1; Single super phosphate (SSP): 0.114 USD·kg-1; muriate of potash (MOP): 0.257 USD·kg-1; Vermicompost(VC): 0.021 USD·kg-1; Farmyard manure (FYM): 0.009 USD·kg-1; Brassicaceous seed meal (BSM): 0.214 USD·kg-1; Neem cake (NC): 0.357 USD·kg-1; Labor wages @ 2.57 USD·man-1 unit-1; Cost of Atrazine: 12.53 USD·kg-1; 1 USD (US dollar) D 70 Indian rupees.