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  • 1 Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences H-1022 Budapest, Herman Ottó út 15. Hungary
  • | 2 Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences Budapest, Hungary
  • | 3 N-telecom Ltd. Kiskunfélegyháza, Hungary
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A new method is introduced to agricultural practice for measuring the living active root of the plants. The measured root capacitance is interpreted in electro-chemical principles. In addition to the electrochemical interpretation of the measurements we aimed to find a non-wounding electrode instead of the needle plant electrode. Another reason for dealing with the tweezer plant electrode was to decrease the relatively high standard deviation of the root capacitance readings due to the relatively high uncertainty of hitting the xylem with the needle plant electrode. To improve and standardize the contact between the tweezer plant electrode and the stem a high electrical conductivity gel (UNIGEL) was applied on the stem before clipping the tweezers.   Experiments for the root capacitance measurements were made in temperature and light controlled climate chambers (Conviron, Canada) in 2 litre plastic pots filled with 4:1 soil:sand mixture and water culture. Comparison of the root capacitances of five-week old sunflower plants measured with the needle and the tweezer plant electrodes proved identical in water culture and capillary water saturated soil. However, the applicability of the tweezer plant electrode needs further study for other plants and environmental conditions. The effect of measurement frequency on root capacitance and resistance with the HP4284A impedance bridge was also studied to see the effectiveness of polarization (Figure 1).  From Figure 1 it can be seen that root capacitance decreased at frequencies above 1 kHz, while it increased up to the dielectric constant of water at lower frequencies. An interpretation of measurable root capacitance in the soil-plant system is given using separate measured plant tissue and soil capacitances. We established that root capacitance in the soil-plant system approximates the capacitance of the root tissue.  Good correlation was found between root capacitance and the calculated root surface area (RA) for sunflower plants (Figure 2).   The GW LCR-814 was found suitable for making root capacitance measurements.  Finally, further experimental work is needed to collect information for the more general and extended applicability of the method before it becomes a routine tool in ecological and agricultural practice. 

Senior editors

Editor(s)-in-Chief: Rajkai, Kálmán

Technical Editor(s): Koós, Sándor

Technical Editor(s): Vass, Csaba

Editorial Board

  • Bidló, András (Soproni Egyetem, Erdőmérnöki Kar, Környezet- és Földtudományi Intézet, Sopron)
  • Blaskó, Lajos (Debreceni Egyetem, Agrártudományi Központ, Karcagi Kutatóintézet, Karcag)
  • Buzás, István (Szent István Egyetem, Georgikon Kar, Keszthely)
  • Farsang, Andrea (Szegedi Tudományegyetem, Természettudományi és Informatikai Kar, Szeged)
  • Filep, Tibor (Csillagászati és Földtudományi Központ, Földrajztudományi Intézet, Budapest)
  • Fodor, Nándor (Agrártudományi Kutatóközpont, Mezőgazdasági Intézet, Martonvásár)
  • Győri, Zoltán (Debreceni Egyetem, Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási Kar, Debrecen)
  • Jolánkai, Márton (Szent István Egyetem, Növénytermesztési Intézet, Gödöllő)
  • Kátai, János (Debreceni Egyetem, Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási Kar, Debrecen)
  • Lehoczky, Éva (Agrártudományi Kutatóközpont, Talajtani és Agrokémiai Intézet, Budapest)
  • Makó, András (Agrártudományi Kutatóközpont, Talajtani és Agrokémiai Intézet, Budapest)
  • Michéli, Erika (Szent István Egyetem, Mezőgazdaság- és Környezettudományi Kar, Gödöllő)
  • Németh, Tamás (Agrártudományi Kutatóközpont, Talajtani és Agrokémiai Intézet, Budapest)
  • Pásztor, László (Agrártudományi Kutatóközpont, Talajtani és Agrokémiai Intézet, Budapest)
  • Ragályi, Péter (Agrártudományi Kutatóközpont, Talajtani és Agrokémiai Intézet, Budapest)
  • Schmidt, Rezső (Széchenyi István Egyetem, Mezőgazdaság- és Élelmiszertudományi Kar, Mosonmagyaróvár)
  • Szili-Kovács, Tibor (Agrártudományi Kutatóközpont, Talajtani és Agrokémiai Intézet, Budapest)
  • Tamás, János (Debreceni Egyetem, Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási Kar, Debrecen)
  • Tóth, Gergely (Agrártudományi Kutatóközpont, Talajtani és Agrokémiai Intézet, Budapest)
  • Tóth, Tibor (Agrártudományi Kutatóközpont, Talajtani és Agrokémiai Intézet, Budapest)
  • Tóth, Zoltán (Szent István Egyetem, Georgikon Kar, Keszthely)

 

International Advisory Board

  • Blum, Winfried E. H. (Institute for Soil Research, University of Natural Resources and Life Sciences (BOKU), Wien, Austria)
  • Hofman, Georges (Department of Soil Management, Ghent University, Gent, Belgium)
  • Horn, Rainer (Institute of Plant Nutrition and Soil Science, Christian Albrechts University, Kiel, Germany)
  • Lichner, Ljubomir (Institute of Hydrology, Slovak Academy of Sciences, Bratislava, Slovak Republic)
  • Loch, Jakab (Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary)
  • Nemes, Attila (Norwegian Institute of Bioeconomy Research, Ås, Norway)
  • Pachepsky, Yakov (Environmental Microbial and Food Safety Lab USDA, Beltsville, MD, USA)

 

           International Editorial Board

  • Kätterer, Thomas (Swedish University of Agricultural Sciences (SLU), Sweden)
  • Ole Wendroth (Department of Plant and Soil Sciences, College of Agriculture, Food and Environment, University of Kentucky, USA)
  • Simota, Catalin Cristian (The Academy of Agricultural and Forestry Sciences, Bucharest, Romania)
  • Stolte, Jannes (Norwegian Institute of Bioeconomy Research, Ås, Norway)

Rajkai Kálmán
ATK Talajtani és Agrokémiai Intézet
Herman Ottó út 15., H-1022 Budapest, Hungary
Phone: (+36 1) 212 2265
Fax: (+36 1) 485 5217
E-mail: editorial.agrokemia@atk.hu

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2019  
Scimago
H-index
9
Scimago
Journal Rank
0,204
Scimago
Quartile Score
Agronomy and Crop Science Q4
Soil Science Q4
Scopus
Cite Score
49/88=0,6
Scopus
Cite Score Rank
Agronomy and Crop Science 276/334 (Q4)
Soil Science 104/126 (Q4)
Scopus
SNIP
0,423
Scopus
Cites
96
Scopus
Documents
27
Acceptance
Rate
91%

 

Agrokémia és Talajtan
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Agrokémia és Talajtan
Language Hungarian, English
Size B5
Year of
Foundation
1951
Publication
Programme
2021 Volume 70
Volumes
per Year
1
Issues
per Year
2
Founder Magyar Tudományos Akadémia
Founder's
Address
H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher Akadémiai Kiadó
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0002-1873 (Print)
ISSN 1588-2713 (Online)

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