All publications from your selection

Download RAW file:
DOI:
Description: We investigated the temporal variability of apparent electrical conductivity (ECa) in relation to soil moisture content (SMC) in managed podzol soils to demonstrate the spatial variability of soil physical and hydraulic properties. Two different EMI sensors, CMD Mini-Explorer (CMD) and GEM-2, multi-coil (MC) and multi-frequency (MF), respectively were used for ECa measurements on a 45 m x 8.5 m experimental plot in western Newfoundland, Canada. Results show that there is a significant relationship between the ECa mean relative differences (MRD) and the SMC MRD (R2 = 0.33 to 0.70) for both MC and MF sensors. The ECa standard deviation of the relative differences (SDRD) varies between 0.015 to 0.09, due to the different depth sensitivity between CMD and GEM-2. Also, significant linear relationships were observed between ECa MRD and sand (R2 = 0.35 and 0.53) and silt (R2 = 0.43), but a non-significant linear relationship with clay (R2 = 0.06 and 0.16). The spatial variability of the ECa predicted soil properties were relatively consistent, with lower variability (CV = 3.26 to 27.61), compared to the measured soil properties. We conclude that the temporal stability of ECa can be used in a managed podzol to interpret the spatial variability of soil physical and hydraulic properties.

Keywords: Apparent electrical conductivity, Electromagnetic induction, Soil moisture content, Spatial variability, Temporal stability
Résumé:
Mots-clés:
Citation:
Volume:
Issue:
Pages -
Contributor:
Date: 2018-07-22
Technical field:
Conference name: CSBE/SCGAB 2018 Annual Conference, School of Engineering, University of Guelph, Guelph, Ontario, July 22-25 2018.
Session name: Poster Session

Other information:
Type: Text.Article
Format:
Publication type: Technical conference
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files: