Spikelet sterility
Spikelet sterility readings are obtained from counts of well-developed spikelets in proportion to total number of spikelets on five panicles. Time: at maturity
| Code | Term | Description |
|---|---|---|
| 1 | Highly fertile (>90%) | |
| 3 | Fertile (75-90%) | |
| 5 | Partly sterile (50-74%) | |
| 7 | Highly sterile (<50% to trace) | |
| 9 | Completely sterile (0%) |