Estimation of the operating efficiency of deep loosening soil tillage elements using the rational utilisation factor

In conditions of increasing production and turnover of agricultural crops, soil degradation associated with wind and water erosion leads to depletion of fertile land and reduction of crop yields. One of the ways to increase the protective capacity of cultivated areas is deep loosening. The development of methods for assessing the efficiency and forecasting the use of tillage elements, taking into account economic, qualitative and agrotechnical requirements is an urgent task. To provide for the rational choice of a tillage element, the authors compared commercially produced domestic and foreign chisels, their mechanical and economic parameters and agrotechnical requirements for deep tillage of soils in the Southern Federal District. The analysis of mathematical models and methods was applied to evaluate the efficiency of working elements of soil tillage implements. Forecasts of their service life and loosening quality evaluation were made based on the algorithm developed in Matlab. The algorithm was used to calculate the rational utilisation factor of the chisel based on the data of its thickness and angle of installation, the initial size of the soil clod and the degree of crumbling. The rational utilization factor takes into account chisel design parameters (steel grade, thickness, sharpening angle and hardness), economic (price and estimated service life) and agrotechnical (depth of cultivation). Knowing the rational utilisation factor, we can get a rough estimate of the tool quality at the stage of design or purchase. This solution will reduce unnecessary costs, identify design deficiencies, determine the theoretical degree of crumbling by passive working elements and select the optimal tool taking into account economic, qualitative and agrotechnical requirements.

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