The geometric shapes,size parameters and correlations between dimensions of more than ten maize varieties are measured and analyzed.On the basis of the analyses,a modeling method of a single maize kernel and a maize assembly is proposed based on the sphere filling method.Two maize varieties are selected as examples.By comparison of the experimental results and the Discrete Element Method(DEM)simulation results of the maize kernel packing tests and elf-flow screeningtests,respectively,it is concluded that wh...