Factor

5 days after heading

10 days after heading

15 days after heading

20 days after heading

Maximum temperature

0.235

0.196

0.269

0.360

Minimum temperature

0.196

0.232

0.250

0.334

Average temperature

0.247

0.324

0.263

0.341

Daily temperature difference

0.233

0.215

0.295

0.268

Rainfall capacity

0.055

0.080

−0.173

−0.377

Air humidity

−0.312

−0.233

−0.242

−0.342

solar radiation

0.050

0.031

0.207

0.301