Editing Soybean (section)

===Maturation===
The first true leaves develop as a pair of [[Leaf#Divisions of the blade|single blades]].<ref name=MP197Chapter2 /> Subsequent to this first pair, mature [[Plant stem|nodes]] form compound leaves with three blades. Mature [[trifoliolate]] leaves, having three to four [[leaflet (botany)|leaflets]] per leaf, are often between {{convert|6|and|15|cm|in|frac=2|abbr=on}} long and {{convert|2|and|7|cm|in|frac=2|abbr=on}} broad. Under ideal conditions, stem growth continues, producing new nodes every four days. Before flowering, roots can grow {{convert|2|cm|in|frac=8|abbr=on}} per day. If [[rhizobia]] are present, [[root nodule|root nodulation]] begins by the time the third node appears. Nodulation typically continues for 8 weeks before the [[Rhizobia#Infection and signal exchange|symbiotic infection]] process stabilizes.<ref name=MP197Chapter2 /> The final characteristics of a soybean plant are variable, with factors such as genetics, [[soil quality]], and climate affecting its form; however, fully mature soybean plants are generally between {{convert|50|and|125|cm|in|-1|abbr=on}} in height<ref name=MP197Chapter19>{{cite book |last1=Purcell |first1=Larry C. |last2=Salmeron |first2=Montserrat |last3=Ashlock |first3=Lanny |title=Arkansas Soybean Production Handbook – MP197 |date=2000 |chapter=Chapter 19: Soybean Facts |chapter-url=http://www.uaex.edu/publications/pdf/mp197/chapter19.pdf |publisher=University of Arkansas Cooperative Extension Service |location=Little Rock, AR |page=1 |url=http://www.uaex.edu/publications/mp-197.aspx |access-date=5 September 2016 |archive-date=March 4, 2016 |archive-url=https://web.archive.org/web/20160304011452/http://www.uaex.edu/publications/mp-197.aspx }}</ref> and have rooting depths between {{convert|75|and|150|cm|in|-1|abbr=on}}.<ref>{{cite book |last1=Bennett |first1=J. Michael |last2=Rhetoric |first2=Emeritus |last3=Hicks |first3=Dale R. |last4=Naeve |first4=Seth L. |last5=Bennett |first5=Nancy Bush |title=The Minnesota Soybean Field Book |date=2014 |publisher=[[University of Minnesota Extension]]|location=St Paul, MN |page=33 |url=http://www.extension.umn.edu/agriculture/soybean/docs/minnesota-soybean-field-book.pdf |access-date=16 September 2016 |archive-url=https://web.archive.org/web/20130930151502/http://www1.extension.umn.edu/agriculture/soybean/docs/minnesota-soybean-field-book.pdf |archive-date=September 30, 2013  }}</ref>