The intact seeds are able to adjust the rate of water uptake at germination and vigor tests and protect the embryo from eventual damages of fast water uptake, however seeds with damaged seed coat are not able to regulate water uptake rate that result in increasing of spoiled seeds and weak results of germination tests.
Regarding to above subjects and the results of this study it can be concluded there is a considerable difference between soybean cultivars in resistance to mechanical damage which in this study the cultivar of D.P.X had the highest resistance and Sahar cultivar had the lowest resistance, also the seed moisture content is important to determine the extent of mechanical damage and 12-14 percent moisture content of seed is the best moisture content to minimize the mechanical damage.