الفهرس 
Introduction
Soil propertiesOnly 14 pages are availabe for public view
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Abstract
In this research studding some of factors affecting traction efficiency of tractors and effect on Soil Compaction and bulk density were fested by using three kinds of tires (New – Med- Bare Lugs) , three pressure (90 -130 – 190 KPS) and using inflation tire (AIR /Water). In this research the obtained result studding Bulk Density, Towed Force , Slip, Traction Efficiency , Fuel Consumption, contact Area and effect increasing Dynamic Load on rear tires. All mentioned variables were tested altogether on (Clay – Sand – A agricultural Road Soils). Advice users of agriculture equipment to improve the traction device on all field conditions to obtained an optimum performance from tractors.