An improved method to map soil salinity using EM surveys
Authors: Rentz, Jerrold; Sri Ranjan, Ramanathan
Description: Electromagnetic Induction surveys (EM surveys) are a commonly used method in evaluating various soil properties including but not limited to soil salinity. Electromagnetic induction surveys were carried out on 13 test sites. To calibrate the apparent conductivity (ECa) measurements obtained by the EM survey, each site was sampled at three locations to a depth of 1.2 m using a hand auger with soil samples being retrieved every 0.15 m. A total of 542 soil samples were analyzed for moisture content and ECe to create an accurate soil salinity and moisture content profile. Using statistical analysis the EM data from each test site was calibrated using a combination of ECe and moisture content. Historically, the common calibration method involves the use of only saturated paste extract. Data showing how EM surveys can be used to accurately map soil salinity will be presented.
Keywords: EM survey, soil salinity mapping
Conference name: CSBE/SCGAB 2017 Annual Conference, Canad Inns Polo Park, Winnipeg, Manitoba, 6-10 August 2017.
Session name: Session 2B: Soil & Water: Mitigating Environmental Impact
Publisher: Canadian Society for Bioengineering
Language 1: en
Rights: Canadian Society for Bioengineering