agronomy .agronomy research established in 2003 ... criteria that characterise agricultural power

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  • Agronomy Research Established in 2003 by the Faculty of Agronomy, Estonian Agricultural University

    Aims and Scope: Agronomy Research is a peer-reviewed international Journal intended for publication of broad-

    spectrum original articles, reviews and short communications on actual problems of modern

    biosystems engineering incl. crop and animal science, genetics, economics, farm- and production

    engineering, environmental aspects, agro-ecology, renewable energy and bioenergy etc. in the

    temperate regions of the world.

    Copyright: Copyright 2009 by Estonian University of Life Sciences, Latvia University of Agriculture,

    Aleksandras Stulginskis University, Lithuanian Research Centre for Agriculture and Forestry. No

    part of this publication may be reproduced or transmitted in any form, or by any means, electronic

    or mechanical, incl. photocopying, electronic recording, or otherwise without the prior written

    permission from the Estonian University of Life Sciences, Latvia University of Agriculture,

    Aleksandras Stulginskis University, Lithuanian Research Centre for Agriculture and Forestry.

    Agronomy Research online: Agronomy Research is available online at: http://agronomy.emu.ee/

    Acknowledgement to Referees: The Editors of Agronomy Research would like to thank the many scientists who gave so

    generously of their time and expertise to referee papers submitted to the Journal.

    Abstracted and indexed: SCOPUS, EBSCO, CABI Full Paper and Thompson Scientific database: (Zoological Records,

    Biological Abstracts and Biosis Previews, AGRIS, ISPI, CAB Abstracts, AGRICOLA (NAL;

    USA), VINITI, INIST-PASCAL.)

    Subscription information: Institute of Technology, EULS

    St. Kreutzwaldi 56, 51014 Tartu, ESTONIA

    E-mail: timo.kikas@emu.ee

    Journal Policies:

    Estonian University of Life Sciences, Latvia University of Agriculture, Aleksandras Stulginskis

    University, Lithuanian Research Centre for Agriculture and Forestry, and Editors of Agronomy

    Research assume no responsibility for views, statements and opinions expressed by contributors.

    Any reference to a pesticide, fertiliser, cultivar or other commercial or proprietary product does

    not constitute a recommendation or an endorsement of its use by the author(s), their institution or

    any person connected with preparation, publication or distribution of this Journal.

    ISSN 1406-894X

  • 1508

    CONTENTS

    V. Adamchuk, V. Bulgakov, V. Nadykto, Y. Ihnatiev and J. Olt

    Theoretical research into the power and energy performance of agricultural

    tractors ................................................................................................................... 1511

    V. Adamchuk, V. Bulgakov, N. Skorikov, T. Yezekyan and J. Olt

    Developing a new design of wood chopper for grape vine and fruit tree

    pruning and the results of field testing .................................................................. 1519

    K. Bahmani, A. Izadi Darbandi, D. Faleh Alfekaiki and M. Sticklen

    Phytochemical diversity of fennel landraces from various growth types

    and origins ............................................................................................................. 1530

    I. ern, J. Pecen, T. Ivanova and Z. Piksa

    The dependence of the durability of digestate briquettes and sorption

    properties on represented particle sizes ................................................................. 1548

    A. Chechetkina, N. Iakovchenko and L. Zabodalova

    The technology of soft cheese with a vegetable component ................................. 1562

    V. Emelyanov, I. Loginova, M. Kharina, L. Kleshchevnikov and M. Shulaev

    Identification of kinetics parameters of wheat straw and sugar beet pulp

    hydrolysis with sulphurous acid ............................................................................ 1573

    E. Haiba, L. Nei, M. Ivask, J. Peda, J. Jrvis, M. Lillenberg, K. Kipper and

    K. Herodes

    Sewage sludge composting and fate of pharmaceutical residues recent studies

    in Estonia ............................................................................................................... 1583

    M. Hruka and P. Jindra

    Presentation title: Ability to handle unfamiliar systems in passenger cars

    according to driver skills ....................................................................................... 1601

    J. Hurtek, J. Volf and V. Novk

    The possibilities of pneumatic reactive stabilization of vehicles .......................... 1609

  • 1509

    V. Karpov, T. Kabanen, Z.Sh. Yuldashev, A. Nemtsev and I. Nemtsev

    Basic theory and methods for managing energy efficiency in consumer

    systems .................................................................................................................. 1619

    J. Kosiba, . ork, J. Glos, J. Jablonick, V. Vozrov, A. Petrovi and

    J. Csillag

    Monitoring oil degradation during operating tests ................................................ 1626

    J. Kreicbergs, G. Zalcmanis and A. Grislis

    Vehicle in-use tyre characteristics evaluation during winter driving training ...... 1635

    P. Laurson, H. Kaldme, A. Kikas and U. Meorg

    Detection of changes in the water, blackcurrant- and raspberry juice infrared

    spectrum in the range 2,5004,000 cm-1 ............................................................... 1645

    R. Nedla and R. Nedla

    Support scheme for CHP and its sensitivity on heat wasting ................................ 1652

    M. Prikryl, P. Vaculik, L. Chladek, L. Libich and P. Smetanova

    The human factors impact on the process of milking .......................................... 1659

    A. Remmik, J. Hrma and R. Vrnik

    Economic considerations for using sexed semen on Holstein cows and heifers

    in Estonia ............................................................................................................... 1671

    B. Rivza, M. Kruzmetra and V. Zaluksne

    Performance trends for smart growth in the rural territories of Latvia ................. 1684

    O. Sada, A. Leola and P. Kic

    Choosing and evaluation of milking parlours for dairy farms in Estonia ............. 1694

    A.V. Shcherbakov, S.A. Mulina, P.Yu. Rots, E.N. Shcherbakova and

    V.K. Chebotar

    Bacterial endophytes of grapevine (Vitis vinifera L.) as promising tools in

    viticulture: isolation, characterization and detection in inoculated plants ........... 1702

  • 1510

    K. Tihomirova, B. Dalecka and L. Mezule

    Application of conventional HPLC RI technique for sugar analysis in

    hydrolysed hay ...................................................................................................... 1713

    T. Vaimann, A. Rasslkin, A. Kallaste and M. Mrss

    Feasibility study of a local power supply system for sparsely populated

    areas in Estonia ..................................................................................................... 1720

    J. Vegricht and J. imon

    The impact of differently solved machine lines and work procedures of

    feeding and bedding on dust concentration in stables for dairy cows ................... 1730

    I. Vilcane, T. Koppel, J. Bartusauskis, V. Urbane, J. Ievins, H. Kalkis and

    Z. Roja

    Electromagnetic fields exposure to head, torso and limbs in office

    workplaces............................................................................................................. 1737

  • 1511

    Agronomy Research 14(5), 15111518, 2016

    Theoretical research into the power and energy performance of

    agricultural tractors

    V. Adamchuk1, V. Bulgakov2, V. Nadykto3, Y. Ihnatiev3 and J. Olt4,*

    1National Scientific Centre, Institute for Agricultural Engineering and Electrification,

    11, Vokzalna Str., Glevaha-1, Vasylkiv District, UA 08631 Kiev Region, Ukraine 2National University of Life and Environmental Sciences of Ukraine, 15, Heroyiv

    Oborony Str., UA 03041 Kyiv, Ukraine 3Tavria State Agrotechnological University of Ukraine, Khmelnytskoho pr. 18,

    Melitopol, UA 72312 Zaporozhye region, Ukraine 4Estonian University of Life Sciences, Kreutzwaldi 56, EE 51014 Tartu, Estonia *Correspondence: jyri.olt@emu.ee

    Abstract. The widespread use of a great number of different types and manufacturer brands of

    tractors in agricultural use raises several important questions. These all concern the

    implementation of the criteria which may be involved in making the right choice in regard to a

    particular power unit that is capable of delivering the required result during the subsequent course

    of that units service life. Even more importantly, the result should be an economically sound

    one. Despite the fact that tractor theory offers a sufficient number of scientifically grounded

    criteria that characterise agricultural power units with respect to their particular properties, the

    engine power rating remains the most widely used and decisive figure and the factor which

    defines the ultimate choice of power unit. Meanwhile, the traction properties of tractors,

    especially in case of wheeled tractors, should be of prime importance as these properties

    determine the maximum measures that can be taken in relation to efficiency levels in power units

    as parts of various unitised agricultural machines. Currently, in most areas around the world, the

    traction and energy performance of wheeled tractors is determined using