Field experiment was conducted to study the effect of shapes rotary plow blades in loam soil, through using two models of rotary plow blades were (the manufactured form (T) and Conventional form of (C)), with two levels of opened angle of rotary plow cover which were (35° and 70°) degrees, and with two tillage speed levels (3.95 and 6.03)km/h, Then their effects in studied characteristics (plowing depth, draw-bar power, actual productivity, performance efficiency, volume of disturbed soil, and distance between wetting blades). The study implemented in the Randomized Complete Block Design and the use of Split–Split Plot Design with three replicates. The results showed that increasing speed from 3.95 - 6.03 km/h lead to increased draw-bar power, , actual productivity, volume of disturbed soil, and distance between wetting blades but decreased plowing depth and performance efficiency. Increasing the opened angle of rotary plow cover from (35° ـ 70°) degrees lead to increased plowing depth, draw-bar power, and volume of disturbed soil but decreased distance between wetting blades. the manufac- tured blades form (T) significantly surpassed on Conventional blades form of (C) in give better values for all studied characteristics exceptionality draw-bar power. the speed (6.03) km/h with an opening angle of the cover of the plow at (70°) degrees succeeded in giving higher values for volume of disturbed soil. the manufactured blades form (T) at the speed (3.50) km/h intangible succeeded in recording higher plowing depth, also recording at the speed (6.03) km/h higher draw-bar power and higher distance between the wetting blades and higher actual productivity and higher volume of disturbed soil. the manufactured blades form (T) at (70°) of opening angle intangible succeeded in recording higher plowing depth and higher draw-par power and higher volume of disturbed soil. As for the interaction between the forward speeds of plowing and the opening angles of rotary plow cover and the shape of the plow blade, no distinctions among the studied features had been noticed.