Application of laser profilograph in the assessment of mechanical tillage of slope lands

Abstract

The article analyzes an extensive set of measurements of the daily surface profile of cultivated soil in order to justify the moving average method for evaluating morphological parameters and studying the influence of the base length of the profile on the accuracy of the obtained values. The surface roughness for the elementary platform was 5.08 mm, the surface ridge formed by technological furrows was 21.9 mm, and the slope of the platform was 0.056 or 3.2 degrees. The accuracy of the obtained values of roughness and ridges of the surface of the treated soil depends significantly on the length of the profile under study, determined by the number of measurements performed. For one turn of the device for the elementary platform, 9616 data points were obtained on the profile length of 6.3 m (3 measurements are performed per 2 mm). The surface roughness varied from 2 mm to 6 mm, and the ridge – 16 ... 28 mm with the number of measurements from 2000 to 9600. When the measured profile length is about 1.3 m or less (no more than 2000 points), the parameters of the treated soil cover are greatly underestimated, and this error is greater for ploughed soil than for cored soil. On flatter surfaces, the base profile length of 2.5 m may be sufficient to adequately calculate the parameters of the daily soil surface.