Study of the Effective Parameters of an On-the-go Single Blade Soil Mechanical Resistance Measurement System

摘要

An On-the-go Single Blade Soil Mechanical Resistance Measurement System (OSBSMR) was developed and tested under field conditions. The horizontal Soil Mechanical Resistance Index (SMRI) was obtained at discrete sensing depths nominally centered at 10, 20, 30 and 40 cm. Results showed that soil moisture content and working depth had significant effects on the SMRI. Increasing soil moisture content decreased both SMRI and soil cone index (CI). Travel speed in the range of 1.78 to 3.57 km h-1 didn’t have significant effect on the SMRI. There was a good correlations with R2=0.51 and R2=0.69 between CI and SMRI at the depths of 20-30 and 30-40 cm, respectively, but this value in the depths of 0-10 and 10-20 cm were marginal. This was due to the SMRI depends on soil failure mode ahead the sensor as well as the degree of soil packing. A critical depth of 20 cm was obtained by surveying of soil failure mode.