Evaluation location: Illinois, United States
Descriptive characteristics, agronomic performance, seed composition and disease reaction data of soybean accessions FC 01.547 to PI 266.807 in maturity groups I and II was recorded. Also included were cultivars, in these same maturity groups, developed at public institutions in the United States and Canada, and released by 1966. Data were gathered from a test planted on the Agronomy South Farm, University of Illinois, Urbana (Latitude: 40 Degrees 08 Minutes N Longitude: 88 Degrees 12 Minutes W Elevation: 227 meters Soil class: Flanagan Silt Loam). Two replications of each maturity group were grown in plots two rows wide and 2.4 m long, with 100 cm between rows. Replication 1 was planted on May 14, 1964 and replication 2 was planted on June 3, 1964. Because the plots were not end trimmed at maturity, plots were considered to be 3.1 meters long when original yield data were converted to a per acre value. All original yield per acre values have been converted to megagrams per hectare at 13 percent moisture. Tests were blocked by maturity group to minimize competition effects. A composite sample from the two replications was used to obtain seed composition data. Protein percentages were obtained using the Kjeldahl method. Oil percentages were determined by the extraction method Methionine values were obtained using Krober's modification of the McCarthy-Sullivan colorimetric method using enzymatic hydrolysis. Fatty acid composition was obtained using the spectrophotometric method of Collins and Sedgwick.