Main heading
Date on which 80% of the plants are heading. It is specified either as the number of days from effective seeding date to main heading date (7.2.3.1) or as effective seeding date and main heading date (7.2.1 and 7.2.3.2).
| Code | Term | Description |
|---|---|---|
| 7.2.3.1 | Number of days from effective seeding to main heading date [d] | |
| 7.2.3.2 | Main heading date [YYYYMMDD] |