Two typical Sorghum particles are shown in Figure 2a and are characterized by a slightly elliptical plan shape, with a long dimension of 4.5 mm and a transverse dimension of 3.5 mm (average of 12 grains). The grains are, on average, 2.5 mm thick. A transverse sectional view through the thickness of an individual grains shows a rectangular profile with generously rounded edges. Wheat particles are shown in Figure 2b, have a much larger aspect ratio with a particle length of 6 mm. A transverse section through the Wheat shows an approximately circular profile of 2.5 mm diameter with a small flattened (indented) section approximately 0.3 mm deep along the grains length. All listed grain dimensions have a typical variance of 0.5 mm. The solid density of sorghum is 1366
kg/m3 and wheat is 1460 kg/m3 as measured in an air comparison pycnometer.