Agrokémia és Talajtan
Volume/Issue:
Volume 51: Issue 1-2

Electrical Capacitance as the Indicator of Root Size and Activity

Authors:
Kálmán Rajkai Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences H-1022 Budapest, Herman Ottó út 15. Hungary
Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences Budapest, Hungary
N-telecom Ltd. Kiskunfélegyháza, Hungary

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K. R. Végh Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences H-1022 Budapest, Herman Ottó út 15. Hungary
Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences Budapest, Hungary
N-telecom Ltd. Kiskunfélegyháza, Hungary

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T. Nacsa Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences H-1022 Budapest, Herman Ottó út 15. Hungary
Research Institute for Soil Science and Agricultural Chemistry (RISSAC) of the Hungarian Academy of Sciences Budapest, Hungary
N-telecom Ltd. Kiskunfélegyháza, Hungary

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Pages:
89–98
Online Publication Date:
05 Jun 2007
Publication Date:
01 Mar 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1556/agrokem.51.2002.1-2.11
Keywords:
electrical analague; root capacitance; root activity; polarization
Restricted access

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. 

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Cover Agrokémia és Talajtan
Agrokémia és Talajtan
Print ISSN:
0002-1873
Online ISSN:
1588-2713

Senior editors

Editor(s)-in-Chief: Szili-Kovács, Tibor

Technical Editor(s): Vass, Csaba

Editorial Board

  • Bidló, András (Soproni Egyetem, Erdőmérnöki Kar, Környezet- és Földtudományi Intézet, Sopron)
  • Blaskó, Lajos (Debreceni Egyetem, Agrár Kutatóintézetek és Tangazdaság, Karcagi Kutatóintézet, Karcag)
  • Buzás, István (Magyar Agrár- és Élettudományi Egyetem, Georgikon Campus, Keszthely)
  • Dobos, Endre (Miskolci Egyetem, Természetföldrajz-Környezettan Tanszék, Miskolc)
  • 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)
  • Imréné Takács Tünde (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Jolánkai, Márton (Magyar Agrár- és Élettudományi Egyetem, Növénytermesztési-tudományok Intézet, Gödöllő)
  • Kátai, János (Debreceni Egyetem, Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási Kar, Debrecen)
  • Lehoczky, Éva (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Makó, András (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Michéli, Erika (Magyar Agrár- és Élettudományi Egyetem, Környezettudományi Intézet, Gödöllő)
  • Pásztor, László (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Ragályi, Péter (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Rajkai, Kálmán (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Rékási, Márk (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Schmidt, Rezső (Széchenyi István Egyetem, Mezőgazdaság- és Élelmiszertudományi Kar, Mosonmagyaróvár)
  • Tamás, János (Debreceni Egyetem, Mezőgazdaság-, Élelmiszertudományi és Környezetgazdálkodási Kar, Debrecen)
  • Tóth, Gergely (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Tóth, Tibor (Agrártudományi Kutatóközpont, Talajtani Intézet, Budapest)
  • Tóth, Zoltán (Magyar Agrár- és Élettudományi Egyetem, Georgikon Campus, Keszthely)

International Editorial 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)
  • Inubushi, Kazuyuki (Graduate School of Horticulture, Chiba University, Japan)
  • Kätterer, Thomas (Swedish University of Agricultural Sciences (SLU), Sweden)
  • Lichner, Ljubomir (Institute of Hydrology, Slovak Academy of Sciences, Bratislava, Slovak Republic)
  • Nemes, Attila (Norwegian Institute of Bioeconomy Research, Ås, Norway)
  • Pachepsky, Yakov (Environmental Microbial and Food Safety Lab USDA, Beltsville, MD, USA)
  • Simota, Catalin Cristian (The Academy of Agricultural and Forestry Sciences, Bucharest, Romania)
  • Stolte, Jannes (Norwegian Institute of Bioeconomy Research, Ås, Norway)
  • Wendroth, Ole (Department of Plant and Soil Sciences, College of Agriculture, Food and Environment, University of Kentucky, USA)

         

Szili-Kovács, Tibor
ATK Talajtani 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

Indexing and Abstracting Services:

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2022  
Web of Science  
Total Cites
WoS		 not indexed
Journal Impact Factor not indexed
Rank by Impact Factor

not indexed
Impact Factor
without
Journal Self Cites		 not indexed
5 Year
Impact Factor		 not indexed
Journal Citation Indicator not indexed
Rank by Journal Citation Indicator

not indexed
Scimago  
Scimago
H-index		 10
Scimago
Journal Rank		 0.151
Scimago Quartile Score

Agronomy and Crop Science (Q4)
Soil Science (Q4)
Scopus  
Scopus
Cite Score		 0.6
Scopus
CIte Score Rank		 Agronomy and Crop Science 335/376 (11th PCTL)
Soil Science 134/147 (9th PCTL)
Scopus
SNIP		 0.263

2021  
Web of Science  
Total Cites
WoS		 not indexed
Journal Impact Factor not indexed
Rank by Impact Factor

not indexed
Impact Factor
without
Journal Self Cites		 not indexed
5 Year
Impact Factor		 not indexed
Journal Citation Indicator not indexed
Rank by Journal Citation Indicator

not indexed
Scimago  
Scimago
H-index		 10
Scimago
Journal Rank		 0,138
Scimago Quartile Score Agronomy and Crop Science (Q4)
Soil Science (Q4)
Scopus  
Scopus
Cite Score		 0,8
Scopus
CIte Score Rank		 Agronomy and Crop Science 290/370 (Q4)
Soil Science 118/145 (Q4)
Scopus
SNIP		 0,077

2020  
Scimago
H-index		 9
Scimago
Journal Rank		 0,179
Scimago
Quartile Score		 Agronomy and Crop Science Q4
Soil Science Q4
Scopus
Cite Score		 48/73=0,7
Scopus
Cite Score Rank		 Agronomy and Crop Science 278/347 (Q4)
Soil Science 108/135 (Q4)
Scopus
SNIP		 0,18
Scopus
Cites		 48
Scopus
Documents		 6
Days from submission to acceptance 130
Days from acceptance to publication 152
Acceptance
Rate		 65%

 

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
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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