Abstrakt
The experiments were conducted in two locations, both soil were homogeneous loamy soil. The experiments were carried out at different moisture content (18.3 and 20.4%) for the first and second locations respectively during the Agricultural Season of 2018 at Diwaniyah Province. The aim of the study was to investigate the effect of tractor types (2WD and 4WD) New Holland tractor at two levels of speeds( 4.2 and 6.5 km.h) and at two different tillage depths (15 and 20 cm) on some technical properties of machines unit and soil physical properties. Fuel consumption and slippage percentage are observed considerable rise with increase of forward speed and tillage depth in both of locations. The higher value rate of soil compaction indicators of the Bulk density and porosity at tractor tire track in the bottom of the tillage furrow was achieved while using (2WD) tractor type as compared to the (4WD) tractor type. The effect of moisture content was significant on increasing of soil compression as well as increasing fuel consumption. In addition Statistical significant effect of moisture content was found on slippage percentage which led to an increase in soil compaction and technical properties for machines unit.