<abstract xmlns="http://www.w3.org/1999/xhtml">

This paper investigates the possibility of improving the vibration isolation of a tractor cab by changing the stiffness of its rubber-metal supports. A spectral analysis of the vibration isolation properties of these supports is presented. The research was conducted on a BELARUS 1221 tractor at idling, at the maximum engine speed, with no load. The cab was mounted on rubber-metal vibration absorbers of serial design with different rubber hardness. Measurements were made with a first class certified Oktava 101VM instrument with registration of RMS acceleration values, expressed in dB, in the frequency range of 8-1000 Hz. The instrument was set in “local vibration” mode. The AR2082M probe was attached to the respective measurement points using adhesive. Mathematical relationships are given to optimize the work on the development of a new and upgraded design of the rubber-metal supports in use. It is shown that varying the stiffness of the rubber-metal supports has different effects in the low and high frequencies of the spectrum. A stiff support is effective in damping low-frequency vibrations but degrades the support’s properties in damping high-frequency vibrations, and vice versa. A soft support is more effective at higher frequencies and reduces the effectiveness of the support at lower frequencies.
</abstract>

Belarusian State Agrarian Technical University

Department of Agricultural, Forest and Transport Machinery

Vibration Reduction with Rubber-Metal Cab Supports

<abstract xmlns="http://www.w3.org/1999/xhtml">

The article presents the results that can be a prerequisite for the introduction of a pre-sowing electrotreatment of winter rape seeds into the production process. The results of photon emission by rape seeds after electrical stimulation are highly correlated with the data obtained during determination of its sowing qualities and field germination. Absorption and transformation of the energy of the external electric field during the electrostimulation of winter rape seeds occurs non-linearly. It was established that the main transformations take place during the first 15 s, regardless of the electric field intensity. Relaxation processes were revealed, which become dominant after 15 s of electrical stimulation. The pre-sowing electrical stimulation improved the sowing properties of winter rapeseed. The highest values of germination energy and laboratory germination (87% and 96%), which exceeded the control by 9% and 8%, were obtained under the treatment mode E=2 kV·cm−1, t=30 s. Pre-sowing electrostimulation of winter rape seeds at optimal conditions helps to increase its field germination. Under the treatment mode E=2 kV·cm−1, t=30 s was 90%, and with E=3 kV·cm−1, t=30 s – 83% versus 79.7% in the control.
</abstract>

National University of Life and Environmental Sciences of Ukraine

Higher Educational Institution “Podillia State University”

Innovative Program of Strategic Development of the University, European Social Fund, University of of Agriculture in Krakow

Department of Mechanics and Agroecosystems Engineering

Optimization of the Modes of Pre-Sowing Electrical Stimulation of Winter Rape Seeds Based on the Study of the Intensity of Single Photon Emission by Them

<abstract xmlns="http://www.w3.org/1999/xhtml">

The quality of the manufactured product plays a special role in the food industry. Food producers, in addition to meeting consumer requirements, are obliged to comply with legally sanctioned, rigorous requirements of hygiene and cleanliness at work, as well as the way it is performed. In order to maintain the legally required hygiene rules in production plants specializing in the production of food products, manufacturers implement numerous management systems aimed at maintaining legally imposed guidelines in the field of quality management and occupational health. The article describes the use of the DPMO indicator, which allows for a thorough analysis of process parameters affecting the final quality of the manufactured product. For the analyzed process, the maximum DPMO value for one of the areas is 636364. In nine cases, which constitutes 12.5% of the total, DPMO is 0. The purpose of this article is to identify non-compliances in the field of occupational hygiene in the production plant analyzed using the DPMO indicator and then to introduce improvements. The developed recommendations concern marking, standardization and responsibility for individual processes as well as additional cleanliness inspections.
</abstract>

The Use of the DPMO Indicator to Verify the Fulfilment of Hygienic Requirements in the Food Industry - A Case Study

<abstract xmlns="http://www.w3.org/1999/xhtml">

Majority of past research on agricultural product production is related with irrigated areas. Thus, the purpose of this study was to evaluate the energy use pattern in wheat production planted as dry farming in Northwest of Iran. Initial data were collected by means of questionnaires from farmers and agricultural experts in the area. Energy use efficiency indices, net energy, specific energy, energy productivity, energy intensiveness and the total input of energy and total output were computed. Analysis of the total input energy showed that fuel and chemical fertilizer had the highest energy consumption, and the seeds, labor work and chemical pesticides had the lowest energy consumption in wheat production. Energy use efficiency and energy productivity of 1.79 and 0.748 kg·mJ−1 were obtained, respectively. The total input and output energy were 33927.61 and 60803.81 MJ·ha−1, respectively.
</abstract>

Faculty of Agriculture and Natural Resources, Department of Biosystem Engineering

University of Mohaghegh Ardabili, Faculty of Agriculture and Natural Resources

Analysis of Energy Indicators of Dry Farming Wheat Production in Northwest of Iran

<abstract xmlns="http://www.w3.org/1999/xhtml">

The object of the study is the process of separation of seed material according to the seed density on the working surface of the pneumatic sorting table. The main defining design variables and linkage parameters of the equipment are analyzed, which realizes the process of separation of seed materials, and is coordinated with physical and mechanical variables of raw materials. The principles of modeling of seed material layer movement as a multiphase medium are provided. Under the effect of working surface vibrations and the power of an airstream the layer take on the properties of pseudoliquid. The criteria of chosen variables are presented, on which depend quality and quantity indicators of the separation process of seed materials according to the seed density. Optimal values of the separator linkage parameters are analytically determined and dependence diagrams are built. Secant lines of surfaces for a concrete crop (raw material) are performed. The “purity” of heavy fraction during the variation of indicated parameters is studied. It is proved that there are differences in types of the dependences: different decreasing of functions and increasing of airstream velocity. It is obvious that this nature is determined by difference in density of original raw materials. This way the smallest influence a change in the air-stream velocity causes to soybean raw material, as soybean has the biggest density. At the same time, the biggest affect is provoked on sunflower seeds, which have the smallest density among the used types of raw materials, as well as a triangle form.
It is determined that the maximal frequency of the basic fraction, gained by the separation of wheat seed material on PST, is obtained under the airstream velocity in the range 1.3-1.5 m·s−1. For corn the rational air-stream velocity falls in the range 1.3-1.6 m·s−1, for sunflower – 1.2-1.4 m·s−1, for soybean – 1.2-1.4 m·s−1. These figures are valid under the condition of using the relevant rational decisions of frequency and amplitude of vibrations of pneumatic sorting table deck during the separation of grain mixtures, as well as longitudinal and transverse angles of inclination. The veracity of experimental studying results is proved by the corresponding theoretical models of the process.
</abstract>

Department of Reliability and Durability of Machines and Structures Named After V.Ya. Anilovich

Department of Equipment and Engineering of Processing and Food Industries

Head of Department of Transporting and Agricultural Machinery

Department of Production Engineering, Logistics and Applied Computer Science

Determination of Ways of Improving the Process of Separation of Seed Materials on the Working Surface of the Pneumatic Sorting Table

<abstract xmlns="http://www.w3.org/1999/xhtml">

This study focused on an engineering problem of heat and mass transfer in infrared (IR) assisted heat pump (HP) drying of purple yam including both a drying experiment and theory of heat and mass transfer mathematical equations. The experimental drying of yam by the IR assisted HP drying method was performed to evaluate the effect of IR power on drying rate and heating rate. The input drying parameters included the drying air temperature of 50°C, drying air velocity of 2.5 m·s−1 and IR power of 0, 300 and 350 W, in which, at the IR power of 0 W, the HP-only drying mode was performed. The experimental drying results showed that the IR assisted HP drying method could improve the drying rate and heating rate as compared to HP-only drying. At the IR power of 350 W, the drying time was the shortest (150 minutes), followed by the IR power of 300 W (210 minutes) and HP-only drying (300 minutes). The IR assisted HP drying obtained the high heating rate as the time required for the drying material to reach the drying temperature was about 35 and 25 minutes corresponding to the IR power of 300 and 350 W. While in HP-only drying, it took about 270 minutes for the drying material’s temperature to reach nearly the drying air temperature value. Besides, the comparison between the predicted data by numerically solving the heat and mass transfer equations and experimental drying data was also conducted. The analysis results indicated that the predicted data could be used to predict the experimental data accurately. The theoretical results of heat and mass transfer in the IR assisted HP drying process as well as experimental drying results would be the basis for improving the IR assisted HP drying equipment to achieve the drying efficiency including the drying rate, quality of dried products, and energy consumption.
</abstract>

Heat and Mass Transfer in Infrared Assisted Heat Pump Drying of Purple Yam

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Agricultural Engineering

Online ISSN: 2449-5999, Print ISSN: 2083-1587  The following are published in "Agricultural Engineering" Journal:   scientific papers which include original results of the completed theoretical or experimental research the content of which may increase the scientific knowledge in agricultural engineering,  review articles which present the current state and knowledge development trends within the scope of the selected issues concerning agricultural engineering,  scientific news which present selected fragments of research which are carried out and original scientific positions, measuring methods or methods of developing measurement results.   The journal subject covers agricultural engineering, production engineering, food processing engineering, construction and exploitation of machines, renewable energy sources.  Articles regarding are also accepted plant, animal and horticultural production engineering, food and agricultural processing engineering, dehydration and storing, economics and production management, agricultural farms management, construction and exploitation of vehicles as well as agricultural machines and devices, eco-power industry, IT for agricultural engineering.  Rejection Rate:   42%   Why subscribe and read   the articles present the latest trend in agricultural engineering,  over twenty years of experience in publishing original articles dealing with various aspects of the agriculturale engineering,  expert authors from all over the world,  high quality publishing, available in electronic.  Why submit   constructive and fair peer review by international experts in the field,  high quality editing,  articles abstracted by online indexing services and databases,  extensive promotion of each published article to the researchers working in the same field.    Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process.  Publishing fee   article in English 800 EUR. 