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Small Grains Development Using Zadoks, Feekes, and Haun Scales

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Comparison of Three Scales for Cereal Grain Development
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