Comparative Performance Evaluation of Power Harrow vs Tandem Disk Harrow in Northeastern region of Iran

Abstract

The aim of the present research was to evaluate the performance of the power harrow (PH) and compare the quality of seedbed prepared by that of obtained from different numbers of disk harrowing (intensity of tillage), combination of power harrowing-number of disk harrowing and ground speed in dry soils of northeastern region of Iran. The results indicated that there was a significant difference between different treatments at 1% level of probability. It was also observed that the type of harrow used had a significant effect, at 5% level of probability, on Soil Aggregate Size (MWD) and Aggregate Mechanical Stability (AMS). It was concluded that power harrowing instead of disk harrowing would reduce field traffic hence soil compaction and improve field efficiency as well as seedbed quality if used after moldboard ploughing.