Genetic gain × management interactions in soybean: I. Planting date

摘要: planting date is a commonly manipulated man - agement practice in soybean ( Glycine max (L.) Merr.) production; however, the impacts of past and ongoing agronomic improvements, such as earlier planting, on genetic yield improvement associated changes seed protein oil have not been evaluated. The objectives this study were to determine if 30-d difference affected measured rates (i) yield, (ii) mass, (iii) midwestern United States. research was conducted at Arlington, WI, Urbana, IL, Lafayette, IN, during 2010 2011, using 59 Maturity Group (MG) II cul tivars (released 1928-2008) Wisconsin, 57 MG III cultivars 1923-2007) Illi nois Indiana, with targeted dates 1 May June. Earlier provided higher yields (+3.1 kg ha −1 yr ) than late soybean. Seed concentration decreased linearly over cultivar year release rate 0.191 (± 0.069) g for II, 0.242 0.063) III. increased 0.142 0.037) 0.127 0.039) interaction between suggested that trend toward one agro nomic that, when coupled improvement, has syner gistic increase on-farm