Spikelet: fertility
The abundance of well-developed spikelets as a percentage of the total number of spikelets on five representative panicles. May be coded as:
| Code | Term | Description |
|---|---|---|
| 1 | Completely sterile (0%) | |
| 2 | Highly sterile | 1–49% |
| 3 | Partly sterile | 50–74% |
| 4 | Fertile | 75–90% |
| 5 | Highly fertile | >90% |