Factor

5 days after heading

10 days after heading

15 days after heading

20 days after heading

Maximum temperature

0.563**

0.459*

0.401

0.425

Minimum temperature

0.277

0.421

0.437*

0.373

Average temperature

0.426

0.363

0.307

0.378

Daily temperature difference

0.482*

0.440*

0.298

0.362

Rainfall capacity

−0.250

−0.214

0.043

−0.068

Air humidity

−0.334

−0.304

−0.251

−0.277

solar radiation

0.254

0.181

0.070

−0.105