The determiming method of the movement of the soil slice after its rejection from the knife in case of the same rotor rotary tiller direction is stated in the paper. Starting from the known value of the angle (a) at which the theoretical soil slice is rejected and the known initial value of the slanting shot speed (vo), the trajectory and the location of the collision (K) with the formwork or cover of the rotary tiller are determined. First, the time interval (t*) of the duration of the slant shot was determined depending on the distance (D) of the formwork or cover, and then the location of their collision (K defined by the angle c). When analyzing the intensity of the ground crumbling, it is also necessary to know the angle at which the particle strikes the formwork or cover (y) relative to normal, as well as speed at stricke point. The obtained results of the shape of the trajectory of the slanting shot proved to has a great dependence on the angle (a) at which the soil slice is rejected from the knife (ie indirectly from: the width of the blade wing (L), the angle knife setting (g), the moment of the beginning of sliding and friction coefficient relative soil slice to knife surface.

When it comes to fruit and wine production, one of the serious problems for many producers in Serbia is the frost. Frost occurs in a relatively short period of time and, depending on the timing and intensity, can cause greater or less damage to the cultivated crop. Damage can be reflected in a significant decrease in the crop in the current production year, but in addition, the damage can also have a long-term character.

This paper presents a research on the noise intensity and vibrations in the cabin of a self-propelled machine with high clearance, Hidromatiks S-PST, designed for specific farming operations in crop growing. Noise inside the cabin was measured at operator's head level. In order to determine the intensity of "whole body vibrations" that the operators are exposed to while using the self-propelled machines, the vibrations were measured at the seat of the machine."Hand-arm vibrations" were measured at the steering wheel and control stick of the machine. The measurings were performed during travelling on different surfaces: asphalted road, dirt road, and furrows. The results of measured noise level indicated that the effective values obtained from the cabin of a self-propelled machine travelling over asphalted surface, dirt road and furrows were below the limit values of exposure to noise set by the Rulebook. The results showed that travelling of a self-propelled machine on asphalted road, dirt road and furrows had "whole body vibrations"and "hand-arm vibrations", i.e. Daily values of exposure to vibrations (A(8) (m/s2 )), far below the Daily limit values of exposure, and even below the Daily action values of exposure set by the Rulebook, for both types of vibrations. Such results obtained from measured level of noise and vibrations imply that the operators using self-propelled machinery Hidromatiks S-PT, are not in risk of damaging their health, which damages can be caused by noise and vibrations.

The rotary plow can be used for tillage. It is understood as a basic tillage machine. After cultivation, the soil is of a suitable structure, which greatly facilitates the preparation of the soil for sowing. Surface seed bed soil preparation is sufficient in one passage. The rotary plow mixes the soil, unlike the classic plow that overturns the row. The main advantage of a rotary plow is the reduction of the negative effect of the plow pan and allowing better development of the root system, allowing the movement of capillary humidity from the depth upwards, but also facilitating the movement of precipitation to deeper layers. For dry and wet soils, the rotary plow did not turn out to be the best, although equipment for wet soils were mounted, which were sticked on the rotor and on the formwork of the machine. True, although wet soil organs were installed, special grid was not installed to change the formwork in wet conditions and prevent the soil from sticking, due to the smaller contact surface.

The effect of convective and vacuum drying of pea grains on mechanical properties and color was investigated. Drying of the pea grain results in a decrease in the geometric and arithmetic diameter, and by convective drying, the sphericity of the pea grain is disturbed. Convective drying releases moisture from the grain faster than vacuum drying. Vacuum-dried grain peas had statistically significantly lower density values than convective drying. The compression test for individual pea grains revealed statistically significantly lower values of the load for vacuum drying compared to convective drying. Microwave treatment also has a statistically significant effect on the mechanical properties and internal texture of pea grains, especially during convective drying. Vacuum drying proved to be more favorable from the aspect of color as well, while microwave treatment had a negative effect.

Utility aggregate is one of the most important factors in the overall production of a crop. Its importance is reflected in both land preparation and economic aspects. The operating parameters of this system are indicators of the quality of work of a large part of the total production. Therefore, a lot of attention has to be paid to these parameters. Some of the main parameters are work utilization coefficient, shift effect, machine work productivity and live work productivity. It is these parameters that will receive the greatest attention in this paper.