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. 2015 Sep 11;11:43. doi: 10.1186/s13007-015-0083-5

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© Both et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — A quantum sensor on a leveling platform mounted at the top of the canopy for measuring photosynthetically active radiation (PAR). Radiation sensors should be chosen for the specific purpose required. Positioning should be carefully considered to avoid shading or noise from reflective surfaces.