Factor

5 days after heading

10 days after heading

15 days after heading

20 days after heading

Maximum temperature

0.620**

0.448*

0.493*

0.379

Minimum temperature

0.526*

0.420

0.406

0.378

Average temperature

0.524*

0.366

0.496*

0.408

Daily temperature difference

0.616**

0.428

0.448*

0.439*

Rainfall capacity

−0.079

−0.340

−0.425

−0.390

Air humidity

−0.362

−0.365

−0.420

−0.302

Solar radiation

0.301

−0.006

0.213

0.107