Mapping of soil salinity and clay content based on electromagnetic induction measurements by EM38
- Publication Type
- Contribution to conference
- Authors
- Zia S; Wenyong D; Spreer W; He X; Müller J
- Year of publication
- 2010
- Published in
- Proceedings of the XVIIth World Congress of the International Commission of Agricultural Engineering (CIGR)
- Page (from - to)
- 1-10
- Conference name
- the XVIIth World Congress of the International Commission of Agricultural Engineering (CIGR) - Section I: Land and Water Engineering (including EnviroWater 2010)
- Conference location
- Quebec City (Canada)
- Conference date
- 13-17 June 2010
The recent development in the field of electromagnetic induction (EMI) has made it easy to get rapid soil variability information, which can support precision agriculture. But the interpretation of the acquired ECa measurements is a complex process as ECa measurement depends on many influencing parameters. In this study objective was to determine the main soil properties which influence the ECa measurement and to analyse the salinity levels after the 30 years of reclamation of salt affected area in Wuqaio. Results show that for the irrigated sandy and non-saline fields, ECa maps correlate well with the cation exchange capacity (CEC) and exchangeable cation such as Na+ (with R2 of 0.89). The multiple linear regression (MLR) calibration model predicted ECe from EM38 readings with accuracy of R2 ranging from 0.356 to 0.803.