Click on “Download PDF” for the PDF version or on the title for the HTML version.

If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

On-the-Go Capacitance Sensing of Soil Water Content

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  MC09201,  2005 Special Meeting Papers. (doi: 10.13031/2013.29481) @2009
Authors:   Viacheslav I Adamchuk, Charles R Hempleman, Daniel G Jahraus
Keywords:   Soil moisture; water content; frequency domain capacitance; on-the-go sensors; precision agriculture

When analyzing the moisture-related spatial heterogeneity of crop-growing conditions, mapping soil water content is a potentially beneficial practice. Using commercially available point-based sensors is labor-intensive and often fails to generate maps with appropriate measurement density. The capacitance-based sensor analyzed in this paper is a suitable alternative that allows high-density on-the-go measurements obtained at a predefined depth. Laboratory sensor evaluation revealed an error of approximately 3% when predicting volumetric water content as well as giving a similar accuracy of gravimetric water content for limited soil density fluctuations across a wide range of Nebraska soils. Soil moisture maps obtained using this sensor can complement recently popularized soil mechanical resistance maps and other spatial data layers involved in the decision-making strategies now being developed.

(Download PDF)    (Export to EndNotes)