Abstract: The biological climatic data which are 10 soybean varieties of Heihe No.3 and so on planted in 34 seeding times in 26 places of 19 provinces in China from 1980 to 1982 are used in this paper. A computer model of developmental dynamics of two developmental stages of soybean, seeding to emergence and emergence to maturity, was set up in a computer. This computer model is named "Orthostate model of developmental dynamics of soybean". Every parameter in the orthostate model of soybean development not only has a clear biological significance, but also its simulated precision is obviously higher than the traditional "Accumulated temperature model".

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