Page Title
Small Grains Development Using Zadoks, Feekes, and Haun Scales
Text
| Zadoks | Feekes | Haun | Description |
|---|---|---|---|
| Germination | |||
| 00 | Dry Seed | ||
| 01 | Start of Imbibition | ||
| 03 | Imbibition Complete | ||
| 05 | Radicle emerged from seed | ||
| 07 | Leaf just at coleoptile tip | ||
| 09 | 0.0 | ||
| Seedling Growth | |||
| 10 | 1 | First leaf through coleoptile | |
| 11 | 1.+ | First leaf unfolded | |
| 12 | 1.+ | 2 leaves unfolded | |
| 13 | 2.+ | 3 leaves unfolded | |
| 14 | 3.+ | 4 leaves unfolded | |
| 15 | 4.+ | 5 leaves unfolded | |
| 16 | 5.+ | 6 leaves unfolded | |
| 17 | 6.+ | 7 leaves unfolded | |
| 18 | 7.+ | 8 leaves unfolded | |
| 19 | 9 or more leaves unfolded | ||
| Tillering | |||
| 20 | Main shoot only | ||
| 21 | 2 | Main shoot and tiller | |
| 22 | Main shoot and 2 tillers | ||
| 23 | Main shoot and 3 tillers | ||
| 24 | Main shoot and 4 tillers | ||
| 25 | Main shoot and 5 tillers | ||
| 26 | 3 | Main shoot and 6 tillers | |
| 27 | Main shoot and 7 tillers | ||
| 28 | Main shoot and 8 tillers | ||
| 29 | Main shoot and 9 or more tillers | ||
| Stem Elongation | |||
| 30 | 4-5 | Pseudo stem elongation | |
| 31 | 6 | 1st node detectable | |
| 32 | 7 | 2nd node detectable | |
| 33 | 3rd node detectable | ||
| 34 | 4th node detectable | ||
| 35 | 5th node detectable | ||
| 36 | 6th node detectable | ||
| 37 | 8 | Flag leaf just visible | |
| 39 | 9 | Flag leaf ligule/collar just visible | |
| Booting | |||
| 40 | -- | ||
| 41 | 8-9 | Flag leaf sheath extending | |
| 45 | 10 | 9.2 | Boots just swollen |
| 47 | Flag leaf sheath opening | ||
| 49 | 10.1 | First awns visible | |
| Inflorescence Emergence | |||
| 50 | 10.1 | 10.2 | First spikelet of inflorescence visible |
| 53 | 10.2 | 1/4 of inflorescence emerged | |
| 55 | 10.3 | 10.5 | 1/2 of inflorescence emerged |
| 57 | 10.4 | 10.7 | 3/4 of inflorescence emerged |
| 59 | 10.5 | 11.0 | Emergence of inflorescence completed |
| Anthesis | |||
| 60 | 10.51 | 11.4 | Beginning of anthesis/flowering |
| 65 | 11.5 | Anthesis half-way | |
| 69 | 11.6 | Anthesis complete | |
| Milk Development | |||
| 70 | -- | ||
| 71 | 10.54 | 12.1 | Kernel watery ripe |
| 73 | 13.0 | Early milk | |
| 75 | 11.1 | Medium milk | |
| 77 | Late milk | ||
| Dough Development | |||
| 80 | -- | ||
| 83 | 14.0 | Early dough | |
| 85 | 11.2 | Soft dough | |
| 87 | 15.0 | Hard dough | |
| Ripening | |||
| 90 | -- | ||
| 91 | 11.3 | Kernel hard (difficult to divide by thumbnail) | |
| 92 | 11.4 | 16.0 | Kernel hard (can no longer be dented by thumbnail) |
| 93 | Kernel loosening in daytime | ||
| 94 | Over ripe, straw dead & collapsing | ||
| 95 | Seed dormant | ||
| 96 | Viable seed giving 50% germination | ||
| 97 | Seed not dormant | ||
| 98 | Secondary dormancy induced | ||
| 99 | Second dormancy lost |
