الفهرس 
المقدمةOnly 14 pages are availabe for public view
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Abstract
The objectives of the present study were to :1-Perform the economical evaluation for three different methods of potato production from planting untill harvesting.2-determine optimum forward speed of tested machinery for planting and harvesting.3- select the proper machinery system for production of potato crop.4-study the possibility of utilizing ridger with tractor in harvesting potato(semi-mechanization) system.