Mathematical Modeling Regarding Growth Energy Efficiency at Soil Processing with Disc Harrow

To increase the energy efficiency of soil tillage with a disc harrow, the interaction of the working elements (discs) with the soil was studied through mathematical modeling, with the aim of finding a local optimum. This involves a systemic approach, considering the agrotechnical, agrobiological aspects and the characteristics of the soil work process, and from the point of view of engineering sciences, studying the inputs and outputs of the system (the desired final state of the soil, correlated with the initial state). The present paper deals with problems related to the disc harrow aggregate, studying the phenomena of the dynamics of the interaction between the working elements (discs) and the soil, only from the point of view of energy aspects (to work with minimal specific energy consumption, relative to the soil surface worked), the other facets being touched upon only tangentially, where necessary and possible. Knowing the initial and final state of the soil, how these changes can be achieved is defined, a state that must be maintained over a longer term, in correlation with the requirements of the plants to be cultivated, the pedo-climatic conditions, the requirements for maintaining soil fertility, and slowing down the process of soil destruction.