THE EFFECT OF INCLINATION ANGLES OF DISC PLOW AND PLOWING SPEEDS ON SOME FIELD TECHNICAL INDICATIONS AND PLOWING PROFILE GYPSFREOUS SOIL CONDITIONS

	THE EFFECT OF INCLINATION ANGLES OF DISC PLOW AND PLOWING SPEEDS ON SOME FIELD TECHNICAL INDICATIONS AND PLOWING PROFILE GYPSFREOUS SOIL CONDITIONS
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 10, Issue 1, 2010, Pages 255-262
Abstract
The study carried out at the college of agriculture fields – University of Tikreet during season (2008 – 2009) in Gypsfreous soil. Three angles (15, 20, 25) degree of disc plow with three plowing speeds(4.5, 5.5, 6.5)km/hr(three replication for each treatment combination), by a Randomized Complete Block Design is employed, To show its effect on some field technical indications and tilling appearance, Which are the (Plowing Depth , Plowing Width , Number of Soil Clods , Soil Penetration Resistance , Soil Volume Disturbed, Effective Field Capacity, Field Efficiency). The result obtained reveals that the angle (25º) in the largest plowing width, least tilling appearance, highest Effective Field Capacity and Field Efficiency respectively. While, the angle (15º) gave the largest PlowingDepth and least Soil Penetration Resistance. The third plowing speed(6.5)km/hr gave largest Plowing Width, least tilling appearance, largest Soil Volume Disturbed, highest Effective Field Capacity and Field Efficiency respectively. While, gave that the first plowing speed (4.5)km/hr gave the largest Plowing Depth and least Soil Penetration Resistance. The result obtained reveals that the angle (15º) with the plowing speed(4.5)km/hr gave largest Plowing Depth and least Soil Penetration Resistance respectively. While, The angle (25º) with The third plowing speed(6.5)km/hr gave largest Plowing Width, least tilling appearance respectively. While, The angle (20º) with The third plowing speed(6.5)km/hr gave highest Effective Field Capacity and Field Efficiency respectively

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