Abstract
1) in the harvesting stage, the relationship of stems weight and the weight ratio of pods (seeds and podshells) in total weight was negative linear regression. And in the stage of topmost leaf expanding, the relationship of stems weight and the weight ratio of leaves (leaves and petioles) in stems and leaves weight showed negative linear regression. 2) With the abovere lationship, we formulated the equations that calculate total weight and pods yield with stems weight in the harvesting stage, and leaves weight with stems weight in the stage of topmost leaf expanding. 3) With the above equation, we can calculate the maximum weight of pods yield and leaves. 4) It was shown that the transition of stems weight could be inferred from the relationship of stems weight in the flowering stage and the stage of topmost leaf expanding. 5) The yield of soybean was severely influenced with the meteorological condition. 6) It was clear that the constants of the above equation, the maximum yield and the maximum weight of leaves were dependent upon the meteorological condition in a specific period, but not dependent upon the temperature summation and the total amount of insolation in a cultivation period. 7) It was necessary for the high yield of soybean to obtain 100-150 kg/10 a weight of stems. But it is clarified that this weight of stems could not always be obtained with the meteorological condition.
