Title: Thermal conductivity sensing for on-line monitoring and control of the moisture content in rockwool slabs
Authors: De Rijck, G ×
Schrevens, Eddie
De Baerdemaker, J #
Issue Date: May-1998
Publisher: Elsevier science bv
Series Title: Scientia horticulturae vol:74 issue:4 pages:307-312
Abstract: On-line measuring and controlling the climate in a greenhouse is daily practice and can easily be done with climate computers. An automatic on-line and direct measurement of the moisture content of a substrate with growing plants is a major lack in the general automation of horticulture on substrates. The use of thermal conductivity sensing, makes it possible to measure and control the moisture content on-line in inert substrates like rockwool. Ln this way it is possible to supply nutrient solution to plants according to their demands. The thermal conductivity of a homogeneous substrate increases if its moisture content increases. Thermal conductivity measurements are fully controlled by a computer, connected with the irrigation system of the greenhouse. Examples of automatic irrigation in a tomato crop on rockwool slabs, where the computer decides if it is necessary to irrigate or not are elaborated. (C) 1998 Elsevier Science B.V.
ISSN: 0304-4238
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division M3-BIORES: Measure, Model & Manage Bioresponses (-)
× corresponding author
# (joint) last author

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