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B. Hanson, K. Kaita (1997)
Response of Electromagnetic Conductivity Meter to Soil Salinity and Soil-Water ContentJournal of Irrigation and Drainage Engineering-asce, 123
E. Brevik, T. Fenton, D. Jaynes, P. Robert, R. Rust, W. Larson (2000)
Soil sensing techniques as soil survey tools in lacustrine-derived soils, Central Iowa.
JH Zar (1984)
Biostatistical analysis
RM Fritz, DD Malo, TE Schumacher, DE Clay, CG Carlson, MM Ellsbury, KJ Dalsted (1999)
Proceedings of the fourth international conference on precision agriculture
F. Khan, T. Fenton (1994)
Saturated Zones and Soil Morphology in a Mollisol Catena of Central IowaSoil Science Society of America Journal, 58
Faruque Khan (1991)
Relationships of saturated zones and distribution of selected chemical and mineralogical properties in the Clarion catena
(1997)
Soil genesis and classification, 4th edn
M. Batte (2000)
Factors influencing the profitability of precision farming systemsJournal of Soil and Water Conservation, 55
J. Mcneill (1980)
Electromagnetic Terrain Conduc-tivity Measurement at Low Induction Numbers
J. Doolittle, Samuel Indorante, P. Kremmel, D. Grantham, G. Berning (1995)
Mapping the Thickness of Flood‐Plain Splay Deposits with Electromagnetic InductionSoil Horizons, 36
(2002)
The relative influence of soil water content, clay, temperature, and carbonate minerals on soil electrical conductivity readings taken with an EM-38 along a mollisol catena in central iowa
Bg Williams, D. Hoey (1987)
The use of electromagnetic induction to detect the spatial variability of the salt and clay contents of soilsSoil Research, 25
J. Doolittle, E. Ealy, G. Secrist, D. Rector, M. Crouch (1995)
Reconnaissance Soil Mapping of a Small Watershed Using Electromagnetic Induction and Global Positioning System TechniquesSoil Horizons, 36
W. Nettleton, L. Bushue, J. Doolittle, T. Endres, S. Indorante (1994)
Sodium-Affected Soil Identification in South-Central Illinois by Electromagnetic InductionSoil Science Society of America Journal, 58
E. Brevik, T. Fenton (2002)
Influence of Soil Water Content, Clay, Temperature, and Carbonate Minerals on Electrical Conductivity Readings Taken with an EM‐38Soil Horizons, 43
S. Buol (1980)
Soil Genesis and Classification
(1980)
Electrical conductivity of soil and rocks
(1996)
Mapping of sand deposition
(1981)
Soil survey of boone county, Iowa U.S
N. Kitchen, K. Sudduth, S. Drummond (1996)
Mapping of sand deposition from 1993 midwest floods with electromagnetic induction measurementsJournal of Soil and Water Conservation, 51
T. Yahner (1993)
LANDFORMS OF IOWALandscape Journal, 12
WA Jury, WR Gardner, WH Gardner (1991)
Soil physics
R. Kachanoski, I. Wesenbeeck, E. Gregorich (1988)
ESTIMATING SPATIAL VARIATIONS OF SOIL WATER CONTENT USING NONCONTACTING ELECTROMAGNETIC INDUCTIVE METHODSCanadian Journal of Soil Science, 68
S. Lesch, J. Rhoades, J. Herrero (1998)
Monitoring for temporal changes in soil salinity using electromagnetic induction techniquesSoil Science Society of America Journal, 62
(1984)
Biostatistical analysis, 2nd edn
Keith Sheets, J. Hendrickx (1995)
Noninvasive Soil Water Content Measurement Using Electromagnetic InductionWater Resources Research, 31
B. Khakural, P. Robert, D. Hugins (1998)
Use of non-contacting electromagnetic inductive method for estimating soil moisture across a landscapeCommunications in Soil Science and Plant Analysis, 29
(1995)
Electromagnetic induction as a mapping aid for precision farming. In: Conference proceedings, clean water-clean environment-21st century, Vol III. ASAE
R. Kachanoski, I. Wesenbeeck, E. Jong (1990)
Field scale patterns of soil water storage from non-contacting measurements of bulk electrical conductivity.Canadian Journal of Soil Science, 70
E. Brevik, T. Fenton (2003)
Use of the Geonics EM‐38 to Delineate Soils in a Loess over Till Landscape, Southwestern IowaSoil Horizons, 44
WF Andrews, RO Dideriksen (1981)
Soil survey of boone county
C. Morgan, J. Norman, R. Wolkowski, B. Lowery, G. Morgan, R. Schuler, P. Robert, R. Rust, W. Larson (2000)
Two approaches to mapping plant available water: EM-38 measurements and inverse yield modeling.
(1991)
Soil physics, 5th edn
E. Brevik, T. Fenton, D. Jaynes (2003)
Evaluation of the Accuracy of a Central Iowa Soil Survey and Implications for Precision Soil ManagementPrecision Agriculture, 4
J. Doolittle, K. Sudduth, N. Kitchen, S. Indorante (1994)
Estimating depths to claypans using electromagnetic induction methodsJournal of Soil and Water Conservation, 49
M. Johnston, M. Savage, J. Moolman, H. Plessis (1997)
Evaluation of calibration methods for interpreting soil salinity from electromagnetic induction measurementsSoil Science Society of America Journal, 61
G. Topp, W. Reynolds, Richard Green (1993)
Advances in Measurement of Soil Physical Properties: Bringing Theory into PracticeSoil Science, 156
FA Khan (1991)
Relationships of saturated zones and distributions of selected chemical and mineralogical properties in the Clarion catena. Doctoral Dissertation
BG Williams, D Hoey (1987)
The use of electromagnetic induction to detect the spatial variability of the salt and clay contents of soilsAust J Soil Res, 25
Apparent soil electrical conductivity (ECa) has shown promise as a soil survey tool in the Midwestern United States, with a share of this interest coming from the precision agriculture community. To fully utilize the potential of ECa to map soils, a better understanding of temporal changes in ECa is needed. Therefore, this study was undertaken to compare temporal changes in soil ECa between different soils, to investigate the influence of changes in soil water content on soil ECa, and to explore the impacts these ECa changes might have on soil mapping applications. To this end, a 90 m long transect was established. Soil ECa readings were taken in the vertical and horizontal dipoles at five points once every one to two weeks from June until October in 1999 and 2000. At the same time, soil samples were collected to a depth of 0.9 m for volumetric soil water content analysis. Soil ECa readings were compared to soil water content. At four of the five sites linear regression analysis yielded r 2 values of 0.70 or higher. Regression line slopes tended to be greater in lower landscape positions indicating greater ECa changes with a given change in soil water content. Two of the soils had an ECa relationship that changed as the soils became dry. This is an item of concern if ECa is to be used in soil mapping. Results indicated that soil water content has a strong influence on the ECa of these soils, and that ECa has its greatest potential to differentiate between soils when the soils are moist. Soil water content is an important variable to know when conducting ECa surveys and should be recorded as a part of any report on ECa studies.
Precision Agriculture – Springer Journals
Published: Oct 12, 2006
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