Many agronomic products are sold to soybean growers that are used to help protect or increase soybean yield. The purpose of this study was to investigate combinations of products to test for synergy in comparison to individual inputs. Field research was conducted at two locations in Michigan during 2012-2014, with various agronomic inputs, and combinations of inputs applied to soybean. Results showed no increased yield for many of the individual products, but higher yields were found with the high input combination of products. When analyzing all Michigan locations together, the Combination treatment increased yield by 10.4%. When analyzing each site/year individually, 3 of the 5 site years showed response to at least five treatments. Paired comparisons were made between treatments receiving a designated management input and those without the input. Year and location had a significant effect on isoflavone concentrations. The research confirms an interaction between the field environment and management inputs on soybean isoflavone concentrations. Total oil content was not greatly affected although there was a slight negative correlation of total oil with soybean yield over all locations. There were significant differences in all five fatty acids in relation to agronomic practices in individual site years but the effects were not consistent between sites. All five fatty acids were significantly correlated to yield.
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