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. 2020 Apr 15;11:402. doi: 10.3389/fpls.2020.00402

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Copyright © 2020 Zhou, Hu, Xu, Yue, Ye and Yang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Part of the trial design. (A–C) Test site location and the appearance of the greenhouse; (D) field imaging system and integrated sensors—(a) Canon EOS 90D digital camera, (b) Surface Laptop 2 computer, (c) uniform LED surface light source.