Dependent of moisture content [of] soybean seed on physical properties

The main aim of this research is to establish the effects of moisture content on some physical properties of soybean seeds. Testing was performed for the Balkan and Sava varieties. The following physical properties were measured: dimensions, equivalent diameter, sphericity, grain density, apparent density, coefficient of friction, dynamic angle of repose, grain volume and mechanical properties. Moisture content of soybean seeds ranged from 8 to 20%. This paper presents the preliminary results from the first year of research. It was noted that most of the soybean physical properties depends on the humidity in the measured range. It is known from science literature that soya seed (grain) deforming, may cause two cases. The final outcome of dry seeds is grinded grain, and in case of wet grains they may be crushed. This research presents preliminary values of rupture force in the case of grinding grain and analyze the change of modulus of elasticity.