Investigation of laser and ultrasonic ranging sensors for measurements of citrus canopy volume
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Date
2002
Journal Title
Journal ISSN
Volume Title
Publisher
American Society of Agricultural Engineers
Abstract
This study compared ultrasonic and laser measurements of citrus canopy volume with manual measurement
methods. Fifteen trees with different canopy heights and volumes were used. Manual and ultrasonic measurements provided
dimensions for computing the canopy volume whereas laser measurements gave information that could be used to compute
a ‘laser canopy volume index.’ Ultrasonic and laser methods agreed with manual methods (R2 > 0.85, RMSE < 2.15 m3). Laser
showed better prediction of canopy volume than the ultrasonic system because of the higher resolution. Ultrasonic or laser
sensors can be used for automatic mapping and quantification of the canopy volumes of citrus trees.
Description
Applied Engineering in Agriculture 2002, Vol. 18(3): 367–372
Keywords
Precision agriculture, Ultrasonic, Canopy volume, Citrus, Laser