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Some physical properties of some forage plants namely sainfoin (Onobrychis sativa), grasspea (Lathyrus sativus) and bitter vetch (Vicia ervilia) seeds were determined at moisture content of 9.55, 15.40 and 10.00% d.b. (dry basis), respectively. The mean values of length, width, thickness and geometric mean diameter were 5.86, 4.27, 2.84, 4.07 mm for sainfoin seed; 5.29, 4.83, 4.29, 5.28 mm for grasspea seed and 4.12, 3.78, 3.80, 3.89 mm for bitter vetch seed respectively. The mean 1000 seed mass, sphericity, angle of repose, bulk and true density, single seed volume, surface area, porosity values were obtained as 23.92 g, 69.77%, 13.50°, 340.86 kg m^-3, 674.53 kg m^-3, 0.036 cm³, 0.54 cm² and 48.91% for sainfoin seed; 88.50 g, 88.67%, 15.61°, 736.58 kg m^-3, 1273.31 kg m^-3, 0.069 cm³, 1.37 cm² and 42.03% for grasspea seed and 45.39 g, 94.54%, 10.85°, 800.02 kg m^-3, 1543, 32 kg m^-3, 0.030 cm³, 0.48 …