The BBCH-scale (rice) identifies the

phenological Phenology is the study of periodic events in biological life cycles and how these are influenced by seasonal and interannual variations in climate, as well as habitat factors (such as elevation). Examples include the date of emergence of leaves ...

development stages of

rice Rice is the seed of the grass species ''Oryza sativa'' (Asian rice) or less commonly ''Oryza glaberrima ''Oryza glaberrima'', commonly known as African rice, is one of the two domesticated rice species. It was first domesticated and grown i ...

''Oryza sativa''. It is a plant species specific version of the

BBCH-scale The BBCH-scale is used to identify the phenological development stages of plants. BBCH-scales have been developed for a range of crop species where similar growth stages of each plant are given the same code. Phenological development stages of plan ...

. 1 A leaf is unfolded when its ligule is visible or the tip of the next leaf is visible
2 Tillering or stem elongation may occur earlier than stage 13; in this case continue with stages 21 or 30
3 If stem elongation begins before the end of tillering continue with stage 30
4 Flowering usually starts before stage 55; continue with principal stage 6

References

* {{cite journal , last = Lancashire , first = P.D. , author2=H. Bleiholder , author3=P. Langeluddecke , author4=R. Stauss , author5=T. van den Boom , author6=E. Weber , author7=A. Witzen-Berger , title = A uniform decimal code for growth stages of crops and weeds , journal = Ann. Appl. Biol. , volume = 119 , pages = 561–601 , date = 1991 , doi = 10.1111/j.1744-7348.1991.tb04895.x , issue = 3

External links

A downloadable version of the BBCH Scales
BBCH-scale Rice