Northwest and Allee Research and Demonstration Farm
Rising costs of soybean seed combined with herbicide resistant technology fees have caused a re-evaluation of current seeding recommendations. Research conducted by Palle Pedersen, ISU soybean agronomist, has shown there is not a statistical yield difference in yield when there is a final fall stand of 100,000 evenly distributed soybean plants. To evaluate this research on several different locations, cooperators from Sioux, Lyon, and Osceola counties, in northwest Iowa, participated in comparing two populations of soybean seeding rates. A study looking at three populations was also conducted at the Northwest Research Farm.
Iowa State University
DeJong, Joel L. and Sievers, Joshua L., "Northwest Iowa On-Farm Research Soybean Population Comparisons" (2007). Iowa State Research Farm Progress Reports. 951.