Table 5.
Regression estimates of the impact of temperature and rainfall on the yield of major cereal crops in the SE-US, 1980–2020.
| Particulars | Wheat | Rice | Corn | ||||||
|---|---|---|---|---|---|---|---|---|---|
| C | SE | p value | C | SE | p value | C | SE | p value | |
| Tmin (°C) | − 0.01 | 0.08 | 0.89 | 0.18*** | 0.29 | 0.01 | 0.39*** | 0.18 | 0.01 |
| Tmin (Square) | 0.00 | 0.00 | 0.51 | 0.00 | 0.01 | 0.88 | 0.00 | 0.01 | 0.67 |
| Tmax (°C) | 0.14 | 0.19 | 0.45 | − 1.09*** | 0.38 | 0.01 | − 1.12*** | 0.30 | 0.01 |
| Tmin (Square) | 0.00 | 0.00 | 0.58 | 0.02*** | 0.01 | 0.01 | 0.01*** | 0.01 | 0.01 |
| RF (mm) | − 0.03*** | 0.01 | 0.01 | 0.01 | 0.01 | 0.41 | − 0.01 | 0.02 | 0.88 |
| RF (Square) | − 0.0004*** | 0.00 | 0.00 | 0.00 | 0.00 | 0.22 | − 0.0003 | 0.00 | 0.24 |
| Constant | 1.33 | 1.77 | 0.45 | 22.10 | 5.11 | 0.00 | 18.49 | 3.65 | 0.00 |
| District | Yes | Yes | Yes | ||||||
| Time | Yes | Yes | Yes | ||||||
| No of observations | 410 | 164 | 451 | ||||||
***Denote significance at the 1% level; C, SE, and RF represent regression coefficient, standard error, and rainfall, respectively.