site assessment
LandMapper ERM-02 - new handheld EC/ER/SP meter
- Agriculture
- Precision Ag
- Civil Engineering
- Geology/Mining
- Geophysics
- Soil Science
- vertical electrical sounding
- LandMapper
- soil EC mapping
- arrays
- dipole-dipole
- ERM-02
- Schlumberger
- electrical profiling
- Geophysical equipment
- subsurface imaging
- four-electrode probe
- Geophysical methods
- EC
- site assessment
- ER
- SP
*We have a new bath of LandMappers ERM-02 in stock! Please, contact us info@landviser.com or +1-609-412-0555 / 888-306-LAND to discuss suitability of ERM-01 or ERM-02 for your applications. *******
LandMapper ERM-02 is a newest device in the product line of Landviser, LLC. This portative device can measure three important electrical properties of solid, semisolid, and liquid media: electrical resistivity (ER), conductivity (EC), and potential (EP). Using the most accurate four-electrode principle LandMapper ERM-02 measures ER or EC to help you to delineate areas with contrasting soil properties within the fields quickly, non-destructively, and cost-efficiently. Using the device prior to soil sampling you can significantly reduce the amount of samples required and precisely design a sampling plan based on the site spatial variability.
LandMapper ERM-02 measures electrical resistivity or conductivity of soils and related media for express non-destructive mapping and monitoring of agricultural fields as well as construction and remediation sites. In a typical setting, a four-electrode probe is placed on the soil surface and an electrical resistivity or conductivity value is read from the digital display. The device measures electrical resistivity or conductivity in a surface soil layer of the depth from 2 cm down to 20 m, which is set by varying the size of a four-electrode probe.
LandMapper ERM-02 is the most versatile device in LandMapper series and allows you not only measure ER and EC using artificially applied electrical current and four-electrode probes, but also study natural electrical fields in soils (self-potentials) and plants (bio-potentials) with patented non-polarizing electrodes. Electrical balance between soil and plants is important for plant health and electrical potential gradient governs water and nutrient uptake by plants. Monitoring of electrical potentials in plants and soils is a cutting-edge research topic in the leading scientific centers around the world.
Make your own four-electrode probe for soil mapping
Submitted by landviser on Wed, 07/01/2015 - 18:43- ¾” PVC pipe, one section of 10’.
- 2 T-shaped PVC pipe connectors fitting ¾” pipe from all three ends.
- 2 ¾” PVC cups (optional).
- #18 AWG isolated stranded wires, red and black, 15’ each.
- 1”x2” Velcro strip (optional).
- 3 #6 1.5” screws for wood (optional).
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4-electrode probe kit (available from Landviser, LLC) including:
- - 4 stainless steel electrodes (sharpened d= ¼” L=6” bolts)
- - 8 stainless steel ¼” nuts for connecting electrodes with the wires
- - 4 nylon isolated terminals for 18” AWG wire with 5/16” opening
- - 4 banana plugs (2 black, 2 red) for connecting with LandMapper terminals
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- Русский
Sign up for webinar "Application of Geophysical Methods to Agriculture: Methods Employed"
Submitted by landviser on Fri, 02/07/2014 - 19:17- Agriculture
- Farming
- Agrochemistry
- Precision Ag
- Soil Pollution
- Water Pollution
- Reclamation
- Environmental Science
- Geophysics
- Soil Science
- vertical electrical sounding
- LandMapper
- soil EC mapping
- ERM-01
- ERM-02
- GPR
- electrical profiling
- Geophysical equipment
- subsurface imaging
- four-electrode probe
- EC
- site assessment
- ER
- SP
- Geophysical
- iVES
- RES2DINV
- RES3DINV
- resistivity inversion
- freeware
- Ag Geophysics group
- EC
- mapping
- monitoring
- resistivity
- self-potential
Dr. Larisa Golovko (President of Landviser, LLC) will be presenting "Geophysical Methods of Electrical Resistivity and Self-Potential in Agriculture" in first of
Agricultural Geophysics Webinar Series: "Application of Geophysical Methods to Agriculture: Methods Employed"
A live webinar on the application of geophysics to agriculture will be offered on:
Tuesday, February 18, 2014, from 3pm - 4:30pm EST
(2:00 - 3:30 CST, 1:00 - 2:30 MST, 12:00 - 1:30 PST)
This first in a series of agricultural geophysics webinars will focus on the near-surface geophysical methods presently being used for agricultural purposes, which include resistivity, self-potential, electromagnetic induction, ground penetrating radar, dielectric sensors, VIS/NIR/MIR spectrometry, gamma ray spectrometry, mechanical soil compaction sensors, and ion selective potentiometry. Five presenters will provide a short overview of agricultural geophysical methods during the first 30 minutes of the webinar. The last hour of the webinar will be devoted to a panel discussion with the presenters, who will answer questions from the audience.
Location
- landviser's blog
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AEMP-14 - Multi-frequency Electro-Magnetic Induction Sounding
Landviser, LLC is offering advanced equipment for multi-frequency electromagnetic sounding and profiling - AEMP-14 - manufactured by KB Electrometry Ltd in Novosibirsk, Russia.
Price of the system ordered through us is the same as listed on Nemfis.ru. Registered website users can view price of for the complete AEMP-14 system including field hand-held PDA, GPS, laptop with pre-loaded EM interpretation software and training videos in current catalog.
Please, request your personalized quotation from us: info@landviser.com or call 1-609-412-0555 / 1-888-306-LAND. The system is shipped worldwide from Russia, shipping costs will vary. See specification table at the bottom of this page on estimated weight of the system and components.
Evaluating cultivation level of sandy soils in European Russia with electro-geophysical methods
Submitted by landviser on Mon, 01/14/2013 - 23:30Update: Full PDF of the paper is now available!
Electrical resistivity of cultivated sandy soils of humid areas is a complex characteristic based on three fundamental properties of soil matrix, such as soil texture, total organic matter (carbon content) and cation exchange capacity (CEC). Relationship of electrical resistivity (ER) with those properties has been approximated with exponential equation ER=a*exp(-b*x), where x is any of the properties above. The correlation coefficients for ER as function of CEC, texture, or organic matter were between 0.82 and 0.91 for the soils of Klin-Dmitrov watershed near Moscow and Kirov, which suggests their applicability for other humid areas. We present a new approach to approximate exponential relationship ER=a*exp(b*x) with a linear “piece-wise” function based on the age of cultivation for each field.This approach was used to develop management zones based on ER to separate uniform areas of similar organic matter, CEC and clay content. Those basic properties are the foundation of soil fertility in humid areas. They influence biomass and bioactivity of soil microorganisms, thus the exponential relationship between ER and soil microorganisms was also observed. The approach based of electrical resistivity or conductivity was used to evaluate fertility and degree of cultivation of sandy soils in humid areas and for detail soil mapping and delineation of management zones in adaptive precision agriculture. The field and laboratory electrical geophysical methods are recommended for quick and accurate soil mapping and management in sustainable farming.
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*at SAGEEP 2013, March 17-21 in Denver, CO, Larisa Golovko, Ph.D. will also present "Basic Theory of Measuring Electrical Resistivity, Conductivity and Self-Potential in Soils and Plants" with LandMapper ERM-02 and other commercially available geophysical equipment at post-conference workshop "Agricultural Geophysics: Theory and Methods". |
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Cite this presentation as:
Anatoly Pozdnyakov, P.I. Eliseev, Larisa Golovko, Lev A. Pozdnyakov, Maria S. Dubrova, and E.P. Makarova. “Evaluating Cultivation Level of Sandy Soils in European Russia with Electro-geophysical Methods.” In New Views of the Earth. Denver, CO: Environmental and Engineering Geophysical Society, 2013. http://www.eegs.org/AnnualMeetingSAGEEP/SAGEEP2013/SessionsAbstracts.aspx |
Locations
- landviser's blog
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Low-cost GPS logger
Submitted by landviser on Thu, 10/18/2012 - 18:56I had tested a small gadget called GPS logger from Columbus Visiontac. Complete product name-description is:
Product name |
Product Features |
Where to buy |
Columbus V-990 GPS Data Logger (microSD Slot, Voice Recording, 66 ch. MTK) |
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Columbus V-900 Bluetooth GPS Data Logger (microSD , Voice Tag for POI, Driverless, Push to Log, 25 millions waypoints*, XP / Vista/ Linux / Mac OSX Compatible) |
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Locations
- landviser's blog
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Cenozoic Shale Formations as a New Frontier Area - detecting shallow natural gas fields
Submitted by anisimov on Tue, 08/21/2012 - 15:19Guest post by Dr. Leonid Anisimov, Principal Scientist of Lukoil-Engineering, Volgograd, Russia. VolgogradNIPImorneft – scientific center of the LUKOIL Oil Company for the South Volga, Caspian Region and Middle East.
Shalow gas accumulations in shale deposits are unconventional energy resources. However those are hazardous objects for drilling especially in the offshore areas.
Seismic is a principal instrument to detect shallow gas pockets but electromagnetic methods may have advantage. The presentation below shows principal geography and techniques for detection and development of shale gas fields. A pilot project of Landviser LLC in using VES for monitoring accumulation and release of methan in peat bogs of Eastern Siberia is attached.
Locations
- anisimov's blog
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Quick Estimation of Salinity in Field Soils and Irrigation Water with LandMapper ERM-02
Submitted by landviser on Wed, 08/08/2012 - 16:57Soil salinity is routinely evaluated in the labs from electrical conductivity of liquid soil saturation extract (ECe). The resulted total salinity is reported either directly in conductivity units (dS/m) or converted to TDS (total dissolved solids) concentration in ppm (parts per million) using formula: 1 dS/m = 1 mS/cm = 1 mmho/cm = 640 ppm = 640 mg/L= 0.64 g/L=0.064%
But now EC of soil and waters can be measured directly in the field using highly accurate method of four-electrode probe and Landmapper ERM-02 measuring device. Best of all, probes can be build to sense different soil layers down to 30 ft! Probes are simple and inexpensive to make from common materials available at any hardware store.
Soil Science
Submitted by landviser on Thu, 08/02/2012 - 18:40Applications of electrical geophysical methods in classic Soil Science (Pedology, Soil Genesis and Classification) - browse the links and maps on this page to find out more...
1D Vertical Electrical Sounding (VES) with LandMapper Procedure
- Agriculture
- Archaeology
- Soil Pollution
- oil and gas
- Civil Engineering
- Environmental Science
- Geology/Mining
- Geophysics
- Hydrology
- Soil Science
- vertical electrical sounding
- LandMapper
- arrays
- ERM-01
- ERM-02
- Schlumberger
- Geophysical equipment
- Geophysical methods
- site assessment
- ER
- Office/Productivity
- Excel
- iVES
- resistivity inversion
- freeware
The technique and procedure described here can be performed with LandMapper ERM-01 or ERM-02 (set in resistivity mode). The electrode spacings provided in this example are identical to Landviser's supplied "big manual VES" cable set made to measure 16 layers of topsoil down to approximately 9 m. The worksheet for pre-set electrode spacings in such cable re-calculating measured resistivities to 1D VES profile can be downloaded as Manual 1D VES workbook (MS Excel format).
Other electrode spacings are possible for custom-made cable arrays to reach deeper profiles. For example, we developed and tested with LandMapper a 60m-long cable, measuring down to ~ 20 m for one custom hydrology project.
This manual VES technique is most convenient to use with three people. Follow step-by-step instructions below. If you need further help, do not hesitate to contact Landviser, LLC @ +1-609-412-0555 or info@landviser.com. Register on our site and download 7 related publications and software!
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