EVALUATION OF SOME PARAMETERS OF SUBSOILER (DOUBLE TINE) PLOW PERFORMANCE IN CLAY SILTY SOIL

A field research was to conducted to evaluate the performance of double tines plow by studying some performance parameters ( draught force , disturbed soil area and energy utilization efficiency ) .The double tines plow – which manufactured in the state mechanical industry in Al- scandiria – applied at unplowed and plowed clay silty soils with four plowing depth (25,35,45 and 55 cm). these results were compared with the results of (standard treatment) single tine plow . the results indicated that the using of double tines plow led to increase the draught force by 11%, 100% of disturbed soil area and by 90 % of energy utilization efficiency in compared with single subsoiler plow treatment. High significant increasing in those parameters were showed with increasing of plowing depth at both tested soils and high energy utilization efficiency was recorded at 55 cm soil depth with application of subsoiler double tines plow.