Apparent soil electrical conductivity measurements in agriculture

The field-scale application of apparent soil electrical conductivity to agriculture has its origin in the measurement of soil salinity, which is an arid-zone problem associated with irrigated agricultural land and with areas having shallow water tables

D.L. Corwin; S.M. Lesch

2004

Scholarcy highlights

  • The field-scale application of apparent soil electrical conductivity to agriculture has its origin in the measurement of soil salinity, which is an arid-zone problem associated with irrigated agricultural land and with areas having shallow water tables
  • Apparent soil electrical conductivity is influenced by a combination of physico-chemical properties including soluble salts, clay content and mineralogy, soil water content, bulk density, organic matter, and soil temperature; measurements of ECa have been used at field scales to map the spatial variation of several edaphic properties: soil salinity, clay content or depth to clay-rich layers, soil water content, the depth of flood deposited sands, and organic matter
  • ECa has been used at field scales to determine a variety of anthropogenic properties: leaching fraction, irrigation and drainage patterns, and compaction patterns due to farm machinery
  • The measurement of ECa is among the most frequently used tools in precision agriculture research for the spatio-temporal characterization of edaphic and anthropogenic properties that influence crop yield. It is the objective of this paper to provide a review of the development and use of ECa measurements for agricultural purposes, from a perspective of precision agriculture applications
  • ECa is an invaluable agricultural tool that provides spatial information for soil quality assessment and precision agriculture applications including the delineation of site-specific management units
  • Site-specific management units cation exchange capacity laboratory measured electrical conductivity of a 1:1 soil to water extract

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