| Recently, soil compaction is one of the main problems of farmers and the main parameters of efficiency reduction of crops in some areas due to increasing in weight and size of agricultural tractors and passing of them in the field. In this research, for determining of soil compaction after tractor passing, the numerical and empirical methods were used. In empirical method, a Massy Ferguson tractor with a 3 moldboard mounted plough was used. The experiment was carried out in the university of Urmia farmland. The soil’s physical properties were measured in three portions, front of wheels before transmission, after transmission frontal wheel and after transmission hinder wheel in depth of 0 - 5, 5 -10 and 10-15 cm respectively. The resistance of soil was... |
