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. 2021 Aug 18;9:e12005. doi: 10.7717/peerj.12005

Figure 3. Ground-based phenotyping tools as used in field conditions.

Figure 3

(A) Field map showing locations of field plots within a 50-acre center pivot field (Map data ©2018 Google). Corn and cotton were planted in the northeast quarter, which was subdivided into six pies at 15° intervals. Wheat was planted in the southwest quarter, with a segment delineated for NDVI scanning, covering a deficit- and full irrigated area. (B) A back-pack sensing frame equipped with an ACS-430 Crop Circle sensor and a GeoScout Datalogger was used to scan the corn plots; also shown is a pressure chamber being used to measure leaf water potential (Photo credit: Xuejun Dong). (C) A push-wheel sensing cart equipped with an ACS-430 Crop Circle sensor, three Apogee radiometers and one ultrasonic height sensor (Photo credit: Gongneng Feng).