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. 2017 Mar 20;17(3):636. doi: 10.3390/s17030636

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Comparison of the mean and standard deviation of volumetric soil moisture (SM), $θ$ in m³·m⁻³ at sites 2 and 6 in red and blue, respectively, in the ASWP WSN testbed between 10 July and 10 October 2016. (a) Mean SM at a depth of 10 cm; (b) Mean SM at a depth of 30 cm; (c) Standard deviation of the SM at a depth of 10 cm; (d) Standard deviation of the SM at a depth of 30 cm.