MINIMUM AND OPTIMUM SOIL TEMPERATURES FOR SEED GERMINATION
| Crop | Minimum (°C) | Optimum (°C) | Maximum (°C) |
| Rice | 10 to 15 | 31 | 36-38 |
| Cotton | 14 to 15 | 33 to 35 | 39-40 |
| Tobacco | 13 to 15 | 29 | 35 |
| Soybean | 8 to 10 | 29 | 24.2-32.8 |
| Sorghum | 12 to 15 | 25 | 40 |
| Maize | 8 to 10 | 20 | 40-43 |
| oats | 4.5 | 20 | 29-30 |
| Barley | 4.5 | 20 | 29-30 |
| Wheat | 4.5 | 20 | 30-32 |
| Citrus | 15 | 30 | — |
| Brinjal, okra | 18 | 25 to 30 | — |
| Cucumber, bean | 11 to 18 | 25 to 30 | — |
| Carrot | 5 to 8 | 18 to 25 | — |
| Tomato | 11 to 18 | 18 to 25 | — |
| Cauliflower | 5 to 8 | 11 to 18 | — |
| Cabbage | 5 to 10 | 8 to 12 | — |
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