Culm: length
Measured from ground level to the base of the panicle. Record the average of five actual measurements, to the nearest cm. Stage: cultivated species after flowering to maturity; wild species 7 days after anthesis. See Fig. 6. Alternatively, cultivated species can be coded as follows:
| Code | Term | Description |
|---|---|---|
| 1 | Very short | <50 cm |
| 2 | Very short to short | 51–70 cm |
| 3 | Short | 71–90 cm |
| 4 | Short to intermediate | 91–105 cm |
| 5 | Intermediate | 106–120 cm |
| 6 | Intermediate to long | 121–140 cm |
| 7 | Long | 141–155 cm |
| 8 | Long to very long | 156–180 cm |
| 9 | Very long | >180 cm |