A Laboratory Study of Effect of Agricultural Land Packers on Soil
It was found that the packed density of the soil was essentially the same for all packer weights used. No differences in packed density were detected with changes in depth of cultivation, moisture level, or the type of packer. The packed density increased with depth. Based upon these results an equation of packing was developed which related packed density to Depth.
Experimental results were then checked against the theoretical calculations based upon a pressure-sinkage equation. Laboratory compaction tests and consolidation tests were carried out with a Proctor density apparatus and a consolidation apparatus respectively. The results from the compaction tests were compared with the experimental values. The Bossinesq equation was used to draw iso-pressure curves. Densities were calculated by graphical integration of iso-pressure curves using the density-pressure relationship obtained from the consolidation tests. A comparison was made between the densities obtained graphically and experimentally. The trend of calculated values was similar to that of the experimental values to a depth of four inches.
A comparison of the moisture loss from a sample of soil which was cultivated only to that from a sample which was cultivated and packed showed no difference during a period of seven days.
Advisor:Zoerb, Gerald Charles; Bigsby, Floyd Wilber
School:University of Saskatchewan
School Location:Canada - Saskatchewan
Source Type:Master's Thesis
Date of Publication:09/16/2008