Table 1.
Interaction effect of different nutrient sources and weeding regimes on weed density (number m−2) in hybrid maize.
| Treatments Combination | Weed Density (number m−2) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| A. arvensis | C. rotundus | V. hirsuta | |||||||||
| 30 DAS | 60 DAS | 30 DAS | 60 DAS | 60 DAS | |||||||
| Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | Year 1 | Year 2 | ||
| Weedy Check |
RDF | 24.0 (574) | 12.6 (159) | 41.2 (1699) | 38.3 (1469) | 18.3 (333) | 10.7 (114) | 21.2 (448) | 13.5 (182) | 3.09 (9.06) | 5.48 (29.53) |
| RDF + VC | 21.4 (459) | 11.2 (124) | 36.9 (1363) | 36.7 (1346) | 19.5 (379) | 14.4 (206) | 19.9 (395) | 14.1 (199) | 3.05 (8.83) | 5.64 (31.30) | |
| RDF + FYM | 26.7 (714) | 12.2 (148) | 40.7 (1658) | 32.4 (1049) | 19.5 (381) | 12.3 (151) | 20.5 (421) | 14.2 (201) | 2.73 (6.95) | 5.71 (32.05) | |
| RDF + BSM | 26.9 (721) | 9.8 (95) | 34.7 (1203) | 28.3 (802) | 17.1 (293) | 13.5 (180) | 17.5 (304) | 13.4 (179) | 2.41 (5.33) | 5.39 (28.60) | |
| RDF + NC | 29.4 (861) | 11.1 (123) | 39.2 (1537) | 25.4 (643) | 17.4 (302) | 10.8 (116) | 18.1 (328) | 13.6 (184) | 3.62 (12.57) | 5.09 (25.45) | |
| Chemical Weed Management |
RDF | 2.05 (3.69) | 0.71 (0) | 2.6 (6.5) | 4.3 (18.4) | 16.6 (274) | 8.2 (66) | 18.2 (332) | 12.6 (158) | 2.98 (8.35) | 5.21 (26.66) |
| RDF + VC | 2.19 (4.30) | 0.71 (0) | 2.7 (7.0) | 5.6 (31.0) | 19.4 (375) | 9.9 (97) | 19.8 (391) | 13.7 (187) | 2.19 (4.30) | 5.31 (27.65) | |
| RDF + FYM | 1.46 (1.64) | 0.71 (0) | 2.6 (6.3) | 3.2 (9.5) | 15.2 (229) | 7.9 (62) | 17.2 (294) | 15.1 (229) | 2.41 (5.33) | 5.73 (32.31) | |
| RDF + BSM | 1.07 (0.66) | 0.71 (0) | 3.0 (8.4) | 0.7 (0.0) | 16.6 (275) | 12.4 (153) | 21.5 (462) | 12.4 (152) | 2.51 (5.79) | 5.20 (26.54) | |
| RDF + NC | 1.07 (0.66) | 0.71 (0) | 1.3 (1.2) | 0.7 (0.0) | 15.2 (230) | 11.1 (123) | 18.4 (339) | 13.5 (182) | 1.83 (2.85) | 5.71 (32.15) | |
| Integrated Weed Management | RDF | 1.66 (2.25) | 0.71 (0) | 2.0 (3.3) | 0.7 (0.0) | 14.6 (211) | 11.3 (126) | 10.6 (113) | 8.0 (63) | 1.07 (0.66) | 1.66 (2.25) |
| RDF + VC | 2.05 (3.69) | 0.71 (0) | 1.8 (2.8) | 3.5 (12.1) | 16.6 (275) | 11.8 (138) | 11.8 (138) | 7.4 (55) | 0.71 (0.00) | 3.22 (9.87) | |
| RDF + FYM | 1.07 (0.66) | 0.71 (0) | 3.2 (9.8) | 1.9 (3.0) | 15.6 (244) | 13.0 (169) | 9.4 (88) | 8.1 (65) | 0.71 (0.00) | 2.41 (5.33) | |
| RDF + BSM | 1.46 (1.64) | 0.71 (0) | 2.2 (4.4) | 0.7 (0.0) | 17.3 (298) | 7.2 (52) | 12.8 (162) | 6.7 (44) | 1.44 (1.58) | 2.63 (6.42) | |
| RDF + NC | 0.71 (0.00) | 0.71 (0) | 2.8 (7.4) | 0.7 (0.0) | 16.3 (265) | 10.8 (117) | 12.3 (150) | 7.3 (53) | 0.71 (0.00) | 1.29 (1.17) | |
| SEm ± | 2.84 | 0.68 | 2.09 | 1.06 | 1.10 | 1.16 | 1.79 | 1.30 | 0.53 | 0.37 | |
| CD (p ≤ 0.05) | 8.22 | 1.98 | 6.06 | 3.06 | NS | 3.36 | 5.17 | 3.77 | 1.55 | 1.07 | |
RDF: 100% recommended dose (RD) of NPK through fertilizer, RDF + VC: 25% RDN through VC, RDF + FYM: 25% RDN through FYM, RDF + BSM: 25% RDN through BSM, RDF + NC: 25% RDN through NC, Weedy check: Un-weeded control, Chemical weed management: Atrazine 1000 g/ha at 2 DAS, Integrated weed management: Atrazine 1000 g ha−1 at 2 DAS followed by mechanical weeding at 30 DAS. SEm, Standard error of mean; CD, Critical difference; NS, Non-significant. Data given in the parenthesis were original and subjected to square root transformation ().