One of the main indicators of internal combustion engines, tractors and the machine-tractor unit as a whole it's the power. It can change in the process of operation and there comes a time when subsequent use is inadmissible or inexpedient. In such a state, it is appropriate to apply technology to improve this indicator and reduce the fuel or lubricant consumption. The power parameter of an agricultural power machine is essential to achieve high productivity with low operating costs with minimal environmental pollution. The monitoring of changing the power is generally carried out by equipment unbearable and unnecessary for the farmer. The possibility for determining the power of the tractor fitted with the working machine by means of a standard brake performance device is a suitable option for monitoring the technical condition of the machinery. In this way, timely detection of defects and prevention of serious consequences for the engine. Worldwide, various technological options have been developed to improve the power of engines without the need for their disassembly. One of these technological options is the fitting of anamegators (additives) in very small quantities to the engine lubricant oil. In this article is made the experiments to evaluating of the variation of the power performance of a diesel tractor engine treated with anamegators as part of a machine-tractor unit. The acceleration and speed of the machine-tractor unit is recorded through a specialized device ENERGOTEST SM4. On this basis of the experimental results obtained, the driving force and power of the tractor from the machine-tractor unit has been determined by theoretical relationships.

A world problem of increasing importance is the continuous increase of greenhouse gases and the accompanying global warming. Growing global industries, excessive use of fossil fuels, along with deforestation and agriculture, which are major greenhouse gas polluters, are cited as the main causes. Of the greenhouse gases with the largest share, but also the possibility of control is CO2. This gas is vital for the growth and development of plants and, through them, is included in the continuous carbon cycle. On this basis, strategies for sustainable development in agriculture are built since this is one of the main sectors contributing to the increase in carbon emissions. The present study tracked the seasonal dynamic of CO2 uptake by natural grasslands positioned at two altitudes by measuring photosynthesis and plant and soil respiration. A significant variation in CO2 uptake capacity was observed depending on the climatic conditions.

The world's growing population requires increased crop yields for their feeding. In food consumption, fruit is relied upon as one of the sources of vitamins. This necessitates an increase in perennial fruit plantations. Another important product is the consumption of animal foods and products. On the other hand, a growing population is in dire need of electrical energy to meet its needs. This also requires an increase in the production of this type of energy. Worldwide, in order to protect the environment and reduce the consumption of raw materials, it is necessary to produce electricity from RES. This article discusses a model of complex production of plant production from an orchard, animal production and energy from a photovoltaic plant in a unit of arable area.; In practice, these are three separate productions to meet the needs of the population, which, however, have the same area and are located in the same place. Using the specifics of the individual productions, an attempt was made for the joint use of the areas, in which case it is possible to eliminate part of the various technological operations or serve as a basis for the other type of production. Such can be the irrigation of the plantation, the presence of shade from photovoltaics, fertilization of the plum plantation by the animals, fresh food for the animals, etc. The interrelations and the main points in the symbiotic production are given. The model can also be used in other types of joint "green" proceedings, after clarifying their specifics.