Determination of Soil Solution Electrical Conductivity from Bulk Soil Electrical Conductivity Measurements by the Four-Electrode Method

1980 ◽  
Vol 44 (6) ◽  
pp. 1216-1221 ◽  
Author(s):  
A. Nadler ◽  
H. Frenkel
Keyword(s):  
Electrical Conductivity ◽  
Soil Solution ◽  
Bulk Soil ◽  
Soil Electrical Conductivity ◽  
Conductivity Measurements ◽  
Electrode Method

TDR estimation of the resident concentration of electrolyte in the soil solution

Soil Research ◽  
1997 ◽  
Vol 35 (3) ◽  
pp. 515 ◽  
Author(s):  
I. Vogeler ◽  
B. E. Clothier ◽  
S. R. Green
Keyword(s):  
Electrical Conductivity ◽  
Soil Solution ◽  
Electrolyte Concentration ◽  
Time Domain Reflectometry ◽  
The Other ◽  
Bulk Soil ◽  
Small Scale ◽  
Soil Electrical Conductivity ◽  
Soil Columns ◽  
Leaching Experiments

In order to examine whether the electrolyte concentration in the soil solution can be estimated by time domain reflectometry (TDR) measured bulk soil electrical conductivity, column leaching experiments were performed using undisturbed soil columns during unsaturated steady-state water flow. The leaching experiments were carried out on 2 soils with contrasting pedological structure. One was the strongly structured Ramiha silt loam, and the other the weakly structured Manawatu fine sandy loam. Transport parameters obtained from the effluent data were used to predict the transient pattern in the resident electrolyte concentration measured by TDR. The electrolyte concentration was inferred from the TDR-measured bulk soil electrical conductivity using 2 different calibration approaches: one resulting from continuous solute application, and the other by direct calibration. Prior to these, calibration on repacked soil columns related TDR measurements to both the volumetric water content and the electrolyte concentration that is resident in the soil solution. The former calibration technique could be used successfully to describe solute transport in both soils, but without predicting the absolute levels of solute. The direct calibration method only provided good estimates of the resident concentration, or electrolyte concentration, in the strongly structured top layer of the Ramiha soil. This soil possessed no immobile water. For the less-structured layer of the Ramiha, and the weakly structured Manawatu soil, only crude approximations of the solute concentration in the soil were found, with measurement errors of up to 50%. The small-scale pattern of electrolyte movement of these weakly structured soils appears to be quite complex.

Estimation of Soil Solution Electrical Conductivity from Bulk Soil Electrical Conductivity in Sandy Soils

2000 ◽  
Vol 64 (6) ◽  
pp. 1931-1939 ◽  
Author(s):  
G. Amente ◽  
John M. Baker ◽  
Clive F. Reece
Keyword(s):  
Electrical Conductivity ◽  
Soil Solution ◽  
Sandy Soils ◽  
Bulk Soil ◽  
Soil Electrical Conductivity

ESTIMATING SPATIAL VARIATIONS OF SOIL WATER CONTENT USING NONCONTACTING ELECTROMAGNETIC INDUCTIVE METHODS

1988 ◽  
Vol 68 (4) ◽  
pp. 715-722 ◽  
Author(s):  
R. G. KACHANOSKI ◽  
I. J. VAN WESENBEECK ◽  
E. G. GREGORICH
Keyword(s):  
Electrical Conductivity ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Soil Solution ◽  
Soil Texture ◽  
Spatial Variations ◽  
Bulk Soil ◽  
Soil Electrical Conductivity ◽  
Solution Conductivity

The relationships among the spatial variations of soil water content, soil texture, soil solution electrical conductivity, and bulk soil electrical conductivity were examined for a field characterized by net drainage and low concentrations of dissolved electrolytes. Bulk soil electrical conductivity was measured over various depths at 52 locations within a 1.8-ha field using noncontacting electromagnetic inductive meters. Soil water content (0–0.5 m depth) was measured at the same locations using the time domain reflectometry method. Measurements of soil texture and soil solution conductivity were obtained from core samples from 37 of the sampling locations. Soil water content at the site ranged from 0.06 to 0.36 m3 m−3. Clay content ranged from 2.5 to 44% percent and bulk soil electrical conductivity ranged from 0.0 to 0.21 S m−1. Significant correlation existed among almost all of the measured variables. Regression analysis indicated soil solution conductivity had no effect on measured bulk soil electrical conductivity for soil water contents less than 0.25 m3 m−3. Bulk soil electrical conductivity explained 96% of the spatial variation of soil water content independent of a wide range of soil texture. Autocorrelations of soil water content were similar to autocorrelations for bulk soil electrical conductivity. Under conditions similar to those in the study area, it should be possible to infer spatial variations in soil water content quickly by measuring bulk electrical conductivity using noncontacting electromagnetic inductive meters. Key words: Spatial variability, soil water, electrical conductivity, soil texture

Determination of the néel temperature in YBa2Cu3Oz by electrical conductivity measurements

1993 ◽  
Vol 87 (9) ◽  
pp. 775-778 ◽  
Author(s):  
C. Picard ◽  
P. Gerdanian
Keyword(s):  
Electrical Conductivity ◽  
Neel Temperature ◽  
Conductivity Measurements ◽  
Néel Temperature

Soil Solution Electrical Conductivity Measurements Using Different Dielectric Techniques

2003 ◽  
Vol 67 (4) ◽  
pp. 1071-1078 ◽  
Author(s):  
Yasser Hamed ◽  
Magnus Persson ◽  
Ronny Berndtsson
Keyword(s):  
Electrical Conductivity ◽  
Soil Solution ◽  
Conductivity Measurements

DETERMINATION OF ELECTRICAL CONDUCTIVITY OF SOIL SOLUTION

Soil Science ◽  
1947 ◽  
Vol 63 (2) ◽  
pp. 107-118 ◽  
Author(s):  
J. C. WILCOX
Keyword(s):  
Electrical Conductivity ◽  
Soil Solution

Elektrische Leitfähigkeitsmessungen und Bestimmung des G(freie Ionen)-Wertes bei röntgenbestrahlten Flüssigkeiten verschiedener Molekularstruktur

1968 ◽  
Vol 23 (2) ◽  
pp. 126-133 ◽  
Author(s):  
Werner F. Schmidt
Keyword(s):  
Electrical Conductivity ◽  
Room Temperature ◽  
Absorbed Dose ◽  
Recombination Coefficient ◽  
Conductivity Measurements ◽  
Absorbed Dose Rate ◽  
X Ray ◽  
Free Ions ◽  
Radiation Induced

Electrical conductivity measurements were made for the determination of G (free ions) in some hydrocarbons. The radiation source was a x-ray tube operated at 55 kV. Four quantities were measured for each liquid: 1. the stationary electrical conductivity at low electric field strength during irradiation, 2. the mobilities of the radiation-induced ions, 3. the volume recombination coefficient, and 4. the absorbed dose rate.All measurements were performed with aerated liquids at room temperature. The following G-values were obtained: n-pentane 0,1; n-hexane and n-heptane 0,09; iso-octane 0,11; cyclohexane 0,06; benzene 0,07; decalin 0,04. The standard deviation was estimated to ± 25 per cent.

Spatio-temporal impacts of dairy lagoon water reuse on soil: heavy metals and salinity

2015 ◽  
Vol 17 (10) ◽  
pp. 1731-1748 ◽  
Author(s):  
Dennis L. Corwin ◽  
Hamaad Raza Ahmad
Keyword(s):  
Heavy Metals ◽  
Electrical Conductivity ◽  
Heavy Metal ◽  
Water Reuse ◽  
Soil Electrical Conductivity ◽  
Conductivity Measurements ◽  
Lagoon Water ◽  
Soil Heavy Metals ◽  
Spatio Temporal

Heavy metal and salinity impacts on soil from dairy lagoon water reuse are monitored using geospatial apparent soil electrical conductivity measurements.

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