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Soybean Maturity Groups
January 2015



By Jim Orf, Ph.D.
Professor
Soybean Breeding and Genetics
University of Minnesota
Phone: 612-625-8275
Email: orfxx001@umn.edu

 

Executive Summary
(4 min 58 sec)
 

Full Presentation
(13 min 36 sec)
 

 

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Summary: This presentation will help consultants, growers, and other practitioners in the soybean growing regions of the U.S. and Canada understand maturity group designations of soybean varieties developed by public and private institutions or companies. Flowering and maturity of soybeans are determined by the day length of the location where they are grown. Soybean breeders have developed thirteen maturity group designations (using roman numerals) ranging from 000 to X. Maturity group 000 (triple zero) would designate soybean varieties adapted to tropical regions. In the U.S. producers grow maturity groups 00 to VIII. Many companies or institutions now use Arabic numbers for maturity groups and divide each maturity group into tenths (for example 2.9 or 5.8). If planted in mid-May, a full season variety (for a given location) will mature before the first frost (late September to early November). Maximum yield is usually obtained by using a full season variety.


Responsibility: United Soybean Board (USB) farmer-leaders develop and maintain partnerships with U.S. land grant universities and U.S. ag-focused research organizations such as the Plant Management Network to increase the transfer of checkoff-funded applied and practical production research information to U.S. soybean farmers. USB neither recommends nor discourages the implementation of any advice contained herein, and is not liable for the use or misuse of the information provided.

All presentations published on The Plant Management Network reflect individual views of the author/presenter(s) and are not an official position of The Plant Management Network or the author/presenter(s)' affiliated institutions, companies, or organizations. No endorsement of products or companies, institutions, or organizations is intended, nor is criticism implied of those not mentioned. Individuals using agricultural products or any products referenced by The Plant Management Network or its partners, sponsors, or advertisers, should ensure that the intended use complies with current regulations and laws, as well as conforms to the product label.





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