The present study aimed to determine and recognize a database of physical and engineering properties of grains of some main and popular feed, industrial crops which play an important role in designing and developing of specific machines and their operations such as planting, harvesting and grading .The studied crops namely fennel flower, rice (Giza101), rice (Giza 177), broad bean, corn (hyb. 310), corn (hyb. 352), wheat (Giza9) and wheat (Giza 168)and their selection based on their recent coverage area and the expected future expansion of each variety. Various physical properties including grain dimensions (length, width and thickness), the weight of thousand grain, bulk density, percent of sphericity, projected area , and the mechanical properties including angle of repose and coefficient of friction, in addition to the aerodynamic properties including terminal velocity, drag coefficient and Reynold's number, were determined at storage moisture content 7-12%(wb).The obtained data showed that it is recommended to use the stainless steel or galvanized iron in manufacturing of seed hopper used in planting machines, silos and storage containers with sides inclination of 40 ○ to allow an easily sliding for the studied grains.. The physical properties of seed play an important role to select the proper separating and cleaning equipment and the main dimensions are considered in selecting and designing the suitable size of the screen perforations. Also, the average terminal velocities of grains were 4

Some properties of sugar beet seed species were determined to utilize for design and develop the precision planter, handling process and cleaning systems. The main dimensions (length, width and thickness), spherisity, geometric mean diameter, arithmetic mean diameter, surface area, bulk density and true density were identified as physical parameters. Meanwhile, the terminal velocity, and hardness were measured as engineering properties. Results of the above investigated parameters showed that the mean of sugar beet seed properties data were 6.12 mm, 5.30 mm, 4.08 mm, 7.22, 44.59 mm, 5.17 mm, 204.97 mm 2 , 0.277 g/cm 3 , 4.62 g/cm 3 , 1.66 m/sec and 17.64 N respectively for multi-germ species. But, the same data at mono-germ were 4.34 mm, 4.14 mm, 3.82 mm, 5.28, 22.94 mm, 4.10 mm, 112.96 mm 2 , 0.439 g/cm 3 , 0.747 g/cm 3 , 3.049 m/sec and 23.29 N respectively. The mean values for the coefficient of friction were 0.4765, 0.5108, 0.5704 and 0.7276 on stainless steel, iron sheet galvanized, plastic and rubber matrials respectively for multi-germ seeds. Furthermore, the mean values for the coefficient of friction were 0.2609, 0.2894, 0.3027 and 0.3537 on stainless steel, iron sheet galvanized, plastic and rubber matrials respectively for mono-germ seeds.