Effect of Exchangeable Sodium on Soil Electrical Conductivity-Salinity Calibrations

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Date
1988
Authors
Christophe, Jean . B
Rhoades, J. D.
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Abstract
This study was undertaken to ascertain if soil sodicity significantly influences soil elestrical conductivity-salinity calbrations. Laboration columns of Fallbrook (typic Heaploxealfs)and Yolo(typic xerorthents)soils were adjusted to various levels of salinity and sodicity by leaching them with solutions varying in elestrical conductivity and sodium absorptions ratio(SAR);then was measured using four- elctrode techniques. Calibration obtained between 6cm and 6cm. range 2 to 20 were compared at different levels of SAR ranging between 0 to 80 or 400. The calibrations between were found to insignificantly influenced by variations in SAR over the range studied. Normal variations in the exchangeable Na contents of typical saline,arid-land soils should not cause any serious misdiagnosis of soil salinity based on measurement of bulk and use calibrations.
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Library Journal, p. 1110-1113