Figure 7: Isoflavone content in sound seeds of Chiangmai 60 soybean variety grown in different crop years and obtained from Chiang Mai Field Crops Research Center. The soybean samples from each crop year were obtained from different lots. Each lot was extracted and assayed in triplicate. compared to the year 2008. Bars and error bars represent mean standard deviation. 1Isoflavone content was the summation of daidzin and genistin contents.