Effect of Longitudinal Displacement of the Soil Layer Model

The study investigates the displacement of the soil layer under different plowing methods. A distinct effect of longitudinal displacement during layer inversion was identified. ( Research purpose ) To examine the kinematics of the longitudinal displacement of the soil layer under different inversion methods (into its own furrow and into the adjacent furrow) and to provide a quantitative assessment of this phenomenon. ( Materials and methods ) The phenomenon of longitudinal displacement was discovered during a kinematic study of physical soil layer models. For the experiments, a plastic model of a soil layer was constructed with dimensions of 1 centimeter in thickness, 2 centimeters in width, and 7.5 centimeters in length. The layer was subjected to a 180° twist over a distance of 5 centimeters. This displacement can be attributed to the elevation of the model’s center of gravity above the furrow bottom during inversion, which occurs twice due to the sequential shift of the layer’s supporting edges. As a result, the central line of the model becomes curved. ( Results and discussion ) The projection of the curved line onto the plane of the furrow bottom is always shorter than the actual length of the line itself. As a result, unless the layer is forcibly stretched, it inevitably undergoes longitudinal displacement toward the clamped end. The study established relationships that make it possible to determine the magnitude of this displacement, as well as the velocity and acceleration of the soil layer’s cross-section during inversion, based on the kinematic parameters of the layer. ( Conclusions ) The magnitude of the soil layer’s longitudinal displacement is directly proportional to its thickness and is influenced by the stability and twisting coefficients.