Table 1. Climatic conditions of research area.
| June | July | August | September | October | |
|---|---|---|---|---|---|
| Max.Temperature (°C) | 31.6 | 35.9 | 37.0 | 38.4 | 34.2 |
| Min.Temperature (°C) | 5.7 | 12.3 | 9.9 | 8.2 | 3.6 |
| Average temperature (°C) | 18.5 | 23.0 | 22.8 | 20.9 | 15.2 |
| Mean relative humidity (%) | 77.2 | 63.6 | 57.4 | 65.0 | 77.8 |
| Total insolation time (hour) | 225.9 | 364.8 | 142.3 | 248.3 | 191.3 |
| Total precipitation (mm = kg ÷ m²) | 115.8 | 0.2 | 1.0 | 3.4 | 29.0 |
| Average 20 cm soil temperature (°C) | 20.5 | 25.1 | 26.0 | 24.3 | 22.1 |