Figure 4: Isoflavone content in 14 soybean varieties planted at SUT Farm on 19 December 2009, categorized according to physical seed quality. Each soybean sample was extracted and assayed in triplicate (). Bars and error bars represent mean standard deviation. compared to undersized seeds. compared to unsound seeds. 1Isoflavone content was the summation of daidzin and genistin contents.