This article presents the results of the simulation of an automatic control system for the heat supply of a greenhouse complex with a geothermal heat source, conducted in order to study the possibility of geothermal heat supply system automation. Scilab version 6.1 was used for simulation. Based on the results of the simulation, the optimal mode of the automation system function of the heat exchanger primary circuit was developed and implemented. Reagentless treatment of geothermal water in the heat supply system with an acoustic–magnetic device (designed and patented by the authors of this paper) can significantly reduce the intensity of scale formation in the heat exchanger and geothermal heat supply system equipment. It provides conditions for the automation of geothermal heat supply systems of greenhouses with a surface heat exchanger. Using an automation system allows greater accuracy and reliability in maintaining the required temperature regime (18–20 °C) in the greenhouse, reduces the frequency of system shutdown for unplanned cleaning of the heat exchanger and equipment, reduces the complexity of manual operations of heat exchanger and equipment maintenance (removal of sludge, scale) and reduces the economic costs of transportation and heat consumption.

Kuban State Agrarian University named after I. T. Trubilin, Krasnodar, Russian Federation Determining the optimal structure of the tillage combine for working in a particular company is a very difficult task due to many factors. While searching for the optimal choice, it is necessary to strive for having fewer combines in operation, reduce the fuel costs and compensate damages due to changes in agrotechnical terms and soil compaction during the combines' operation. In this article it is proposed to apply the Monte Carlo simulation for solving this issue. As a result of the analysis of models, it was observed that all combines can be divided into separate efficiency groups and form certain tillage complexes. After the analysis of these complexes, it was proposed to replace the tillage tools, which led to further reduction in total costs. So the transition to non-mouldboard technology in both high-efficiency and low-efficiency combines will lead to cost savings by 45%, and the introduction of new tools will reduce the fuel consumption by 61-64%. For high-efficiency machine complexes, non-mouldboard technology allows the reduction of the optimal number of aggregates by 25-32%. At the same time, the introduction of new tillage combines will reduce the number of operating combines by 50-58% due to reduced resistance and the combination of technological operations.

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It has been established that the imbalance of soil processes caused by insufficient intake of organic matter into the soil causes its degradation, decreased fertility, and humus content. There is a problem of ensuring environmental safety. It was also established that the development of new or the improvement of existing structural and technological solutions for tillage is of particular practical interest. Pre-sowing cultivation of the soil is a thorough closure and preservation of moisture through the creation of the upper mulched surface, the destruction of weeds and the creation of favorable conditions for seed germination at a biologically optimal depth of planting. For the steppe zone of the North Caucasus (Krasnodar Territory, Rostov Region and Stavropol Territory), which is the main grain-sowing zone in Russia, research is needed to develop innovative means for pre-sowing treatment that provides the accumulation and preservation of moisture and nutrients, reduces fuel consumption and stable movement of working bodies in soils having different densities. To solve this problem, the hypothesis was put forward at Kuban Agrarian University that in order to ensure moisture conservation and reduce energy consumption, stability of movement of the working bodies of the device in soils with different densities is required, while the stand must deviate under the influence of external resistance in three planes. The research was developed and protected by the patent “Device for presowing tillage”. Studies have been carried out to optimize the energy costs of an innovative tool for presowing tillage using experimental design methods that confirm effectiveness.