| Soil Parameters | Method of Analysis | References |
| Bulk density (Mg/m3) | Method No. 421 b, USDA Handbook No. 60 | Richards, 1954 |
| Available N (kg/ha) | Alkaline KMnO4 method | Subbiah and Asija, 1956 |
| Available P2O5 (kg/ha) | 0.5 N sodium bicarbonate extractable P2O5 | Olsen et al. 1954 |
| Available K2O (kg/ha) | Flame photometric method | Jackson, 1973 |
| Available Zn (mg/kg) | DTPA extractable Zn using AAS | Lindsay and Norvell, 1978 |
| EC (dS/m) (1:2 soil water suspension at 25 ℃) | Method No. 4 USDA Handbook No. 60 | Richards, 1954 |
| Soil pH (1:2 soil water suspension) | Method No. 421 b, USDA Handbook No. 60 | Richards, 1954 |
Table
Data were analyzed statistically for analysis of variance (ANOVA). Treatments were compared by computing the ‘F-test’. The significant differences between treatments were compared by critical difference at 5% level of probability [10].
| Treatments | Soil pH | Bulk density (mg m-3) | EC (dS/m) | ||||||
| 2023-24 | 2024-25 | Pooled | 2023-24 | 2024-25 | Pooled | 2023-24 | 2024-25 | Pooled | |
| Sowing Dates | |||||||||
| D1: 5th November | 7.6 | 7.69 | 7.64 | 1.538 | 1.551 | 1.545 | 0.11 | 0.113 | 0.112 |
| D2: 25th November | 7.6 | 7.67 | 7.63 | 1.537 | 1.55 | 1.544 | 0.111 | 0.11 | 0.111 |
| SEm± | 0.01 | 0.01 | 0.01 | 0.005 | 0.003 | 0.003 | 0.001 | 0.001 | 0.001 |
| C.D. (P=0.05) | NS | NS | NS | NS | NS | NS | NS | NS | NS |
| Varieties | |||||||||
| V1: GW 11 | 7.59 | 7.67 | 7.63 | 1.537 | 1.549 | 1.543 | 0.112 | 0.11 | 0.111 |
| V2: DBW 187 | 7.61 | 7.69 | 7.65 | 1.54 | 1.553 | 1.547 | 0.11 | 0.114 | 0.112 |
| V3: DBW 372 | 7.59 | 7.69 | 7.64 | 1.536 | 1.55 | 1.543 | 0.111 | 0.111 | 0.111 |
| SEm± | 0.01 | 0.01 | 0.01 | 0.004 | 0.004 | 0.003 | 0.001 | 0.005 | 0.002 |
| C.D. (P=0.05) | NS | NS | NS | NS | NS | NS | NS | NS | NS |
| Zinc Fertilization (ZnSO4.7H2O) | |||||||||
| Z0: Control | 7.6 | 7.69 | 7.64 | 1.541 | 1.552 | 1.547 | 0.114 | 0.11 | 0.112 |
| Z1: 25 kg/ha BA | 7.57 | 7.67 | 7.62 | 1.535 | 1.552 | 1.544 | 0.11 | 0.114 | 0.11 |
| Z2: 2 FS* | 7.61 | 7.68 | 7.64 | 1.536 | 1.552 | 1.544 | 0.113 | 0.112 | 0.112 |
| Z3: 25 kg/ha BA+1 FS** | 7.61 | 7.69 | 7.65 | 1.538 | 1.546 | 1.542 | 0.111 | 0.111 | 0.111 |
| SEm± | 0.01 | 0.01 | 0.01 | 0.005 | 0.004 | 0.003 | 0.001 | 0.001 | 0.005 |
| C.D. (P=0.05) | NS | NS | NS | NS | NS | NS | NS | NS | NS |
Table 1: Effect of Sowing Dates, Varieties and Zinc Fertilization on Soil PH, Bulk Density and Electrical Conductivity (EC) of Soil after Crop Harvest
BA: Basal application, 2FS*: two foliar sprays of 0.5% at flowering and grain filling stage, 1FS**: One foliar spray of 0.5% at grain filling stage
| Treatments | Available nutrient content in soil (kg/ha) | Available Zn (mg/kg) | ||||||||||
| Nitrogen | Phosphorus | Potassium | ||||||||||
| 2023-24 | 2024-25 | Pooled | 2023-24 | 2024-25 | Pooled | 2023-24 | 2024-25 | Pooled | 2023-24 | 2024-25 | Pooled | |
| Sowing Dates | ||||||||||||
| D1: 5th November | 165.47 | 166.32 | 165.89 | 20.45 | 21.7 | 21.07 | 318.41 | 321.26 | 319.83 | 0.503 | 0.505 | 0.504 |
| D2: 25th November | 165.83 | 167.66 | 166.74 | 20.8 | 21.88 | 21.34 | 321.57 | 322.48 | 322.03 | 0.496 | 0.502 | 0.499 |
| SEm± | 1.3 | 0.7 | 0.74 | 0.18 | 0.22 | 0.14 | 1.33 | 1.21 | 0.9 | 0.002 | 0.003 | 0.002 |
| C.D. (P=0.05) | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS | NS |
| Varieties | ||||||||||||
| V1: GW 11 | 164.52 | 166.55 | 165.54 | 20.38 | 21.6 | 20.99 | 319.17 | 320.37 | 319.77 | 0.493 | 0.5 | 0.497 |
| V2: DBW 187 | 166.19 | 167.2 | 166.7 | 20.63 | 21.9 | 21.27 | 320.05 | 322.43 | 321.24 | 0.501 | 0.503 | 0.502 |
| V3: DBW 372 | 166.23 | 167.21 | 166.72 | 20.87 | 21.86 | 21.36 | 320.76 | 322.81 | 321.78 | 0.504 | 0.507 | 0.506 |
| SEm± | 0.6 | 0.53 | 0.4 | 0.22 | 0.21 | 0.15 | 1.5 | 1.27 | 0.98 | 0.003 | 0.002 | 0.002 |
| C.D. (P=0.05) | NS | NS | NS | NS | NS | NS | NS | NS | NS | 0.008 | 0.006 | 0.005 |
| Zinc Fertilization (ZnSO4.7H2O) | ||||||||||||
| Z0: Control | 161.11 | 162.61 | 161.86 | 19.83 | 20.77 | 20.3 | 319.32 | 322.46 | 320.89 | 0.399 | 0.402 | 0.4 |
| Z1: 25 kg/ha BA | 163.18 | 164.26 | 163.72 | 20.42 | 21.77 | 21.09 | 320.05 | 321.42 | 320.74 | 0.595 | 0.601 | 0.598 |
| Z2: 2 FS* | 167.39 | 169.02 | 168.2 | 20.9 | 22.12 | 21.51 | 320.22 | 321.8 | 321.01 | 0.402 | 0.405 | 0.403 |
| Z3: 25 kg/ha BA+1 FS** | 170.91 | 172.07 | 171.49 | 21.36 | 22.49 | 21.92 | 320.37 | 321.8 | 321.08 | 0.603 | 0.606 | 0.604 |
| SEm± | 0.69 | 0.61 | 0.46 | 0.25 | 0.24 | 0.17 | 1.73 | 1.47 | 1.13 | 0.003 | 0.002 | 0.002 |
| C.D. (P=0.05) | 1.98 | 1.74 | 1.29 | 0.72 | 0.69 | 0.49 | NS | NS | NS | 0.009 | 0.006 | 0.005 |
Table 2: Effect of Sowing Dates, Varieties and Zinc Fertilization on Soil Ph, Bulk Density and Electrical Conductivity (EC) of Soil after Crop Harvest
BA: Basal application, 2FS*: two foliar sprays of 0.5% at flowering and grain filling stage, 1FS**: One foliar spray of 0.5% at grain filling stage
Tables at a glance