The purpose. To probe influence of different fertilizer systems of soya bean on nutritive regime of grey forest soils. Methods. Field experiments with soya bean were spent on grey forest soils by B.A. Dospehov's technique with observance of demands GOST 10106-87 «Field experiments field with fertilizers. Order of their holding». Size of sowing plot was 25-30 m 2 , frequency-4-times. Phosphoric and potassium fertilizers were deposited in the autumn under the basic soil cultivation, nitrogenous-in the spring during presowing cultivation. During vegetative period of soya bean in field experiments they carried out observation, account and laboratory researches. Laboratory analyses of soil and plants were realized according to conventional techniques. Economic efficiency of growing soya bean was determined by technique of NSC «Institute of economy of NAAS» (1999). Mathematical-statistical analysis of the gained results was spent by B.A. Dospehov's method with the use of state-of-the-art computer programs. Results. Application of the designed organic-mineral fertilizer system of soya bean ensured optimum conditions for accumulation of vegetative mass by plants of soya bean, tall indexes of assimilatory surface of plants of soya bean in the phase of swelling of beans, promoted biological fixation of nitrogen. The given fertilizer system of soya bean improved fertility of grey forest soils of Right-bank forest-steppe of Ukraine. Ploughing under of collateral products of the predecessor, sowing green manure crops, importation of fertilizers in dose of N15P30K30, application of microelements, microbiological specimens, treatment of seeds and dabbling sowings by growth stimulants of plants ensured sufficient balance of nutrients of soil. Conclusions. Scientifically justified agroecological fertilizer system of soya bean for grey forest soils of Right-bank forest-steppe heightened their fertility: the content of hydrolyzable nitrogen was increased by 11,5 mg/kg, of mobile phosphorus-on 43, and of potassium-on 8 mg/kg. At use of such organicmineral fertilizer system positive balance of nutrients was formed: nitrogen-26,1 kg/hectare, phosphorus-53,7, potassium-49,8 kg/hectare of soil.

doctor of Agricultural Sciences Institute of agro-ecology and nature use NAANThe purpose. To study influence of liquid complex fertilizers and growth regulators of plants on productivity and quality of crops in organic farming of Ukraine. Methods. Stationary and short-term field trials, conventional methods of researches, dispersion, correlation and variation analysis. Results Application of liquid complex fertilizers and growth regulators of plants increases productivity of crops and improves produce. Conclusions. It is expedient to spread considerably application of liquid complex fertilizers and growth regulators of plants.

Annotation Purpose. Establishment of the relationship between the deformation of the blade parts of tillage and design parameters after electro arc. Methods. Planning an experiment, mathematical statistics and analytical processing of experimental data. Results. The dependences of the deformation of the blade parts of tillage equipment on the design parameters after their recovery and hardening by electro arc are established. Conclusions 1. It has been established that the magnitude of the deformation Δ, mm of the part of tillage, is inversely depends on the thickness δ after hardening. 2. It has been established that the magnitude of the deformation Δ, mm of the part of tillage, is inversely dependent on the width B after hardening. 3. The rational modes of electro arc were established when hardening parts of tillage with a thickness of 4–10 mm, a width of 20 mm to 60 mm and a length of 230 mm to 500 mm, namely, a current of 350–400 A, a voltage of 50–55 V and a temperature cooling medium in the bath of the installation for simultaneous electro arc sharpening and hardening – 20–60 °С. Such rational modes of electro arc ensure the absence of deformation of parts of tillage less than 5 mm, which is permissible according to the requirements of regulatory, technical and design documentation. Keywords: deformation, length, operation, electro arc, hardening, parts of tillage, thickness, width.

Annotation Purpose. Optimization terms of repair and maintenance works due to monitoring of the technical condition in mobile agricultural machinery on the basis statistical simulation using of its technical resource. Methods. System analysis and methods for statistical processing results of operational reliability tractors in experimental farms on NAAS. For the development statistical simulation models, discrete-event simulation, “Any Logic” simulation environment is provided. Results. The intensity using of mobile agricultural machinery during the year by the amount of fuel consumption is established, which makes it possible to plan the terms and scope of repair and maintenance works during the period of minimum load of equipment. The advantages strategy of adaptive maintenance and repair of agricultural machinery in comparison with the planning and warning system, which consist in determining the periods of repair and maintenance work, taking into account the intensity using mobile equipment and residual resource, which is basis for the development and implementation of operational management plans for its technical. Prerequisites for statistical simulation of the process of using the technical resource of mobile equipment are highlighted; the stages of establishment of its residual resource and appointment of terms of repair and maintenance works are defined. Conclusions. The economic effect on the results of research will be to monitor the technical state of mobile equipment, minimization of downtime for technical reasons during intense field work and effective use of technical resources maintaining a crop of potential losses by 8–10% due to the timely implementation processes. Keywords: mobile technology, adaptive repair strategy, initial data, modeling process, modeling algorithm, statistical simulation model, technical condition, residual life, terms of repair works.

Національний науковий центр «Інститут механізації та електрифікації сільського господарства», Україна.Стаття з спеціальності: 133 -галузеве машинобудування.