The present research was carried out in El-Sharkia Governorate, El-Sowa Village in 2014 season to develop and evaluate a portable pneumatic grain broadcasting unit under Egyptian conditions in clay soil. The study included three fan peripheral speeds of 1.7, 1.97 and 2.18 m/s, three grain path lengths of 50, 100 and 200mm from air outlet under and two states of grains (dry and germinated). These parameters were evaluated with horizontal and vertical fan positions, comparing to manual broadcasting on rice grains (Giza 178). Broadcasting width, coefficient of variance (CV), coefficient of distribution uniformity (CU), consumed energy according to power requirements and total costs were determined under split-split plot design with three replicates for all treatments. The obtained results showed that fan peripheral speed of 2.18 m/s and outlet path length of 100mm with horizontal fan gave the best results for all measurements, which obtained thebroadcasting widths of 10.2 and 8.8 m were obtained under horizontal fan with dry and germinated grains, respectively. The least and highest values of CV, CU, Consumed energy and were 17.33 and 82.67 for dry grains and 19.11 and 80.89 for germinated grains respectively. At the above conditions the consumed energy broadcasting costs values were 0.56 and 0.87 kWh/fed, and 10.60 and 13.85 LE/fed for dry and germinated grains, respectively comparing to 20 LE/fed with the traditional method. Finally, the study recommends developing the broadcasting unit to overcome the problems of fragmented, small holdings, which need suitable small machinery with the possibility of trying them in broadcasting other précised seeds. It is also, recommended to study the number and angles of vanes and simultaneously studying different fan diameters and then the material of its manufacturing.