<abstract xmlns="http://www.w3.org/1999/xhtml"> The aim of this experiment was to analyse the influence of climatic factors on the thermal performance of separated liquid manure. The samples of organic bedding were collected from the lying area of dairy housing and preparatory store. The measurement of properties of recycled manure solids (RMS) was carried out in laboratory conditions. Samples were examined with determining the temperature effect on the thermal conductivity λ of ’dry‘ separated liquid manure (with a dry matter content of 60%) and ’wet‘ liquid manure (with a dry matter content of 26%), in air temperatures ranging from 0 °C to 40 °C. Subsequently, the thermal resistance of three selected types of cows lying structures was calculated for winter and summer boundary values. Based on the results of thermal conductivity and thermal resistance, it was observed that dry separated liquid manure as an alternative bedding has, in low temperature (up to 5 °C), the most suitable thermal performance if it is maintained in a dry condition (with a dry matter content of 60%). With increasing temperature (above 20 °C) and increasing humidity of bedding (below 26%), thermo-technical properties get worse; however, when comparing the thermal resistance of the cow bed structure with sandwich mattresses with a 50 mm layer of organic bedding and the deep cubicle filled with 200 mm of organic bedding, the thermal resistance of floor structure decreases by 7.6% or 18.4%, respectively. With a proper handling of the recycled organic bedding, it is possible to use its economic advantages.</abstract>

Effect of Climatic Conditions on Differences in Thermo-Technical Properties of Organic Bedding in Laboratory Testing

<abstract xmlns="http://www.w3.org/1999/xhtml"> In Russia, the cultivated fields represent a major issue. According to various estimates, they occupy 20-40 million hectares. Of course, this is a great reserve for the development of agriculture and, if necessary, production of in-demand crops. However, if the fields are not used for a long term, they become gradually overgrown with weeds during quarantine: ragweed, hogweed, shrubs and trees. Subsequent introduction of these fields in turnover requires multiple treatments of the soil and the use of potent herbicides due to the high cost of the uprooting of trees. Based on the decisions of the Russian Federation on land conservation, the land management project defining the terms of land conservation, prevention of land degradation, restoring of soil fertility and bringing of life to contaminated areas as well as the order of how these activities should be carried out and their cost and suggestions for land use after the completion of the mentioned processes was developed. However, the technology of land conservation is yet to be developed.</abstract>

All-Russian Research Institute of Potato Farming named after A. G. Lorch,

Russian State Agrarian University – Moscow Timiryazev Agricultural Academy, Faculty of Processes and Machines in Agribusiness, Department of Agricultural Machines, Moscow,

Jerusalem Artichoke as a Means of Fields Conservation

<abstract xmlns="http://www.w3.org/1999/xhtml"> The paper is focused on the issues of controllability of machine-tractor units based on wheel-type tractors during their non-straight driving on the soil surface, which is positioned at an angle to the horizon. There were obtained analytical expressions for the determination of the actual indicator of control λd, including both the power and the design parameters of the machine-tractor unit, which affect the abovementioned indicator in the longitudinal vertical plane. These expressions are obtained for the tractor driving on both road and also driving during field operation. In addition, the paper discusses the conditions under which there may occur the cross-slip of the tractor steering wheels in the transversal horizontal plane. As a result of this review, there were obtained the analytical expressions for determining the required indicator of the controllability λd of machine-tractor unit in the horizontal plane, excluding the possibility of lateral sliding of the unit by turning its steering wheels at a certain angle. These expressions are obtained for the two modes of the machine-tractor unit: for driving during transport on the road and during the operation in the field. The machine-tractor unit based on the wheel-type tractor with rear mounted 3-mouldboard plough was analytically investigated. By means of computer calculations, there was observed the fact that when moving in non-straight direction on the soil surface, inclined to the horizon at an angle of 12°, the machine-tractor unit is controllable only when the angles of the steering wheel of the given tractor do not exceed 9°. During the working movement (ploughing) of the given machine-tractor unit on an inclined field surface, its controllability will be preserved on condition that the angle of the tractor steering wheels does not exceed 11°. According to obtained results, it can be stated that the controllability of the machine-tractor unit is determined by the indicator of controllability, taking into account the value of the vertical load acting on the tractor steering wheels, the possibility of their turning in the horizontal plane, as well as the withdrawal of the machine-tractor unit from rectilinear motion and its movement on the field surface, inclined at an angle to the horizon.</abstract>

National University of Life and Environmental Sciences of Ukraine,

National Scientific Centre ’Institute for Agricultural Engineering and Electrification‘,

Tavria State Agrotechnological University of Ukraine,

Slovak University of Agriculture in Nitra, Faculty of Engineering, Tr. A. Hlinku 2, 949 76 Nitra,

Theoretical Consideration of The Controllability Indicator of Machine-Tractor Unit Movement

<abstract xmlns="http://www.w3.org/1999/xhtml"> Presented paper deals with the topic of preventive maintenance. A decision support system was designed, incorporating historical as well as forecast information to calculate the time remaining to preventive maintenance. The designed system optimizes maintenance costs without any further investment and running costs. An algorithm of the designed system is introduced and a case study of its implementation is described in the paper.</abstract>

Czech University of Life Sciences, Prague, Faculty of Engineering, Department of Machinery Utilisation,

Slovak University of Agriculture in Nitra,

Design of Condition-Based Decision Support System for Preventive Maintenance

<abstract xmlns="http://www.w3.org/1999/xhtml"> This paper deals with the influence of some factors relevant to isothermal pyrolysis of residual leaves of Cedrus deodara on the asymptotic solution of the non-isothermal nth order distributed activation energy model (DAEM) using Gaussian distribution. Frequency factor, integral upper limit, the reaction order and the variance of Gaussian distribution are the parameters taken under purview of this study. In order to determine the kinetic parameters of the isothermal nth order Gaussian DAEM from thermoanalytical data of loose biomass pyrolysis, the variation of these factors has been considered. The obtained results show that the predicted results for nth order DAEM hold good at upper limit of dE, E∞ = 39 kJ mol-1.</abstract>

Himgiri Zee University, Department of Mechanical Engineering, Dehradun, U.K,

Govind Ballabh Pant University of Agriculture and Technology, Department of Mathematics, Statistics and Computer Science, Pantnagar, U.S. Nagar, U.K,

Parametric Study of NTH Order Distributed Activation Energy Model for Isothermal Pyrolysis of Forest Waste Using Gaussian Distribution

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Acta Technologica Agriculturae

 Acta Technologica Agriculturae (ATA) is an international scientific journal focused on agricultural engineering. The journal is multidisciplinary and publishes a wide range of original research and review articles in engineering, agricultural and biological sciences, and materials science. All submitted articles considered suitable for ATA are subjected to rigorous double-blind peer review to ensure the highest levels of quality.  The journal Editorial Board welcomes manuscripts in both fundamental and applied research areas and encourages submissions which contribute novel and innovative insights to the field of agricultural engineering. Original papers which provide an important contribution to the development of agricultural engineering and report on significant developments in the field are encouraged.  Aims and Scope  ATA aims to advance the understanding of agricultural engineering by providing a platform for the publication of unique contributions in the field of agricultural engineering across a variety of topics, including, but not limited to:   agricultural and biosystems engineering;  machines and mechanization of agricultural production;  information and electrical technologies;  agro-product and food processing engineering;  physical, chemical and biological changes in the soil caused by tillage and field traffic, soil working machinery and terramechanics;  renewable energy sources and bioenergy;  rural buildings;  agricultural waste management and disposal;  related issues from applied physics and chemistry, ecology, economy and energy.    Rejection Rate   40 %   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. 

Acta Technologica Agriculturae

Volume 20 (2017): Issue 1 (March 2017)

Effect of Climatic Conditions on Differences in Thermo-Technical Properties of Organic Bedding in Laboratory Testing

Jerusalem Artichoke as a Means of Fields Conservation

Theoretical Consideration of The Controllability Indicator of Machine-Tractor Unit Movement

Design of Condition-Based Decision Support System for Preventive Maintenance

Parametric Study of N^TH Order Distributed Activation Energy Model for Isothermal Pyrolysis of Forest Waste Using Gaussian Distribution

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