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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/).
Time response returned upon successive irrigation steps by different fiber optic thermo-hygrometers inserted, at three different heights (namely, H1, H2, and H3) inside (a) the functional package P2 and (b) P4.