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A Soil Salinity Sensor of Improved Design
Author(s) -
Richards L. A.
Publication year - 1966
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1966.03615995003000030012x
Subject(s) - ceramic , environmental science , soil science , calibration , conductivity , leaching (pedology) , materials science , soil water , composite material , chemistry , mathematics , statistics
Kemper (1959) showed that an electrical conductivity cell with spaced electrodes in fine‐pored ceramic that is in contact with the film water in soil can provide continuous measurement of the salt concentration of the soil solution. Information is given on an improved sensor of this type. The response time has been reduced to about 1 hour for bulk solutions by using a ceramic plate 1 mm thick for the sensitive element. The effect of external current paths has been eliminated by shielding and insulation, and temperature compensation has been added. Information is given on calibration procedure, along with data on the use of the senor in irrigation tests and the relation of such data to leaching‐requirement theory.