Wheat Maturity Stage Codes

0  Pre-emergence
 
1  Seedling, one shoot
 
2  Tillering
    2.1  Tillering begins
    2.2  Tillers formed
    2.3  Leaf sheaths lengthen
    2.4  Leaf sheaths strongly erected
 
3  Stem Extension
    3.1  First node of stem visible
    3.2  Second node visible
    3.3  Last leaf just visible
    3.4  Ligule of last leaf just visible
    3.5  Sheath of last leaf completely grown out; head swollen,
         but not yet visible (in boot)
 
4  Heading and Flowering
    4.1  Heads just visible, excading through split of sheath
    4.2  1/2 of heads emerged from sheath
    4.3  All heads emerged from sheath
    4.4  Flowering
    4.5  Kernel 1/4 filled
    4.6  Kernel 1/2 filled
    4.7  Kernel 3/4 filled
    4.8  Kernel completely filled, kernel watery
 
5  Ripening
    5.1  Milk stage
    5.2  Soft dough, contents of kernel soft, but dry
    5.3  Hard dough, kernel hard
    5.4  Ripe, straw dead
 
6  Harvesting
    6.1  Swathed
    6.2  Combined