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Two types of feeding mechanism namely automatic and semi-automatic were investigated to determine an appropriate system for potato planting under Egyptian conditions. The uniformity of seed distribution, performance rate, energy requirement and cost operation were investigated under different levels of operating speed. The results show that the uniformity distribution of seed spacing is a greatly affected by the forward speed of mechanical unit. The mean value of coefficient of variation increased with increasing travel speed. The lowest value of variation was obtained at forward speed of 2.0 Km /h with automatic & semi-automatic feeding mechanism. Increasing of forward speed of mechanical unit lead to increase the void tubers percentage under two feeding mechanisms.

EVALUATION OF LOCAL POTATO PLANTER PERFORMANCE USING AUTOMATIC AND SEMI-AUTOMATIC FEEDING MECHANISM