Download RAW file:
Agricultural practices, seedling germination and crop yields are mostly affected by soil compaction either produced by heavy farm machinery or uncontrolled press wheel weights of seeders. Discrete Element Method (DEM) was used to model the amount of soil compaction produced by press wheel of seeders of varying weights. Model calibration was achieved by determining and collecting data on the susceptibility of sandy loam soil to compaction within a low pressure range (3, 5.75, 8.50, 11.4, and 34 KPa) and under varying soil moisture content (10.0, 20.0, and 30.0% w.b). The model was developed using Particle Flow Code in three dimensions (PFC3D) software and incorporated with model input parameters. Preliminary results of the experimental model calibration performed showed that change in bulk density recorded average values of 15.0, 52.5, and 45.4 Kg/m^3 for low, medium, and high moisture content levels respectively. Also, the change in elevation (sinkage) recorded average values of 13, 32, and 24 mm for low, medium, and high moisture content levels respectively. Analysis of results showed that the moisture content had a significant effect on the bulk density change and sinkage (P < 0.05). Similarly, the change in bulk density and sinkage under varying loading pressure recorded significantly different results for a stipulated range. Therefore, the loading pressure had a significant effect on bulk density change and sinkage as well (P < 0.05). From the experiment, the results were then incorporated into the DEM Press-wheel model for predicting soil compaction produced by press wheel of seeders.
Press wheel, Discrete Element Modelling (DEM), Ground pressure, Sinkage, Moisture Content
CSBE/SCGAB 2019 Annual Conference, Vancouver, BC, 14-17 July 2019.
Electronic and Instrumentation 2
Canadian Society for Bioengineering