TRACTION DATA-ANALYSIS WITH THE TRACTION PREDICTION EQUATION

The assumption of ''zero true slippage at zero net traction'' by Upadh yaya has given rise to a heated argument of wide interest for ISTVS en gineers. This article discusses this argument. Using the traction pred iction equations presented by Upadhyaya, traction data obtained from e xperiments with a 4WD tractor in tilled Kanto loam soil were analyzed. It was impossible to evaluate the unique values for all the parameter s of the traction prediction equations independently. We proposed a re gression model by reforming Upadhyaya's equations, and the regression model fitted well with the traction data plotted. Implications of a ze ro condition in the traction data analysis are also discussed. Copyrig ht (C) 1996 ISTVS.