Draft of Primary Tillage Implements in Sandy Loam Soil

Draft measurements were made for major primary tillage implements operating on sandy loam soil.Implements included three chisel plows of different shanks, an offset disk harrow, a moldboard plow and a disk plow. Theeffects of speed and depth upon the draft measurements were investigated. Soil classification, implement specificationsand results of tillage experiments are reported. A general regression equation to predict draft of these implements wasdeveloped based on speed and depth. A significant increase in draft was observed for all the implements with an increasein depth. The values of specific draft of the six tillage implements tested were affected significantly by speed and depthalso. The relationships between specific draft and speed are presented graphically.