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Open AccessTechnical Note

A Combination of Plant NDVI and LiDAR Measurements Improve the Estimation of Pasture Biomass in Tall Fescue (Festuca arundinacea var. Fletcher)

1
Precision Agriculture Research Group, School of Science and Technology, The University of New England, Armidale, NSW 2351, Australia
2
CSIRO Land and Water, GPO Box 1666, Canberra, ACT 2601, Australia
*
Author to whom correspondence should be addressed.
Academic Editors: Mutlu Ozdogan, Nicolas Baghdadi and Prasad S. Thenkabail
Remote Sens. 2016, 8(2), 109; https://doi.org/10.3390/rs8020109
Received: 7 October 2015 / Revised: 19 January 2016 / Accepted: 25 January 2016 / Published: 1 February 2016
(This article belongs to the Special Issue Remote Sensing in Precision Agriculture)
The total biomass of a tall fescue (Festuca arundinacea var. Fletcher) pasture was assessed by using a vehicle mounted light detection and ranging (LiDAR) unit to derive canopy height and an active optical reflectance sensor to determine the spectro-optical reflectance index, normalized difference vegetation index (NDVI). In a random plot design, measurements of NDVI and pasture height were combined to estimate biomass with a root mean square error of prediction (RMSEP) equal to ±455.28 kg green dry matter (GDM)/ha, over a range of 286 kg to 3933 kg GDM/ha. The combination of NDVI and height measurements were observed to be more accurate in assessing total biomass than just the NDVI (RMSEP ± 846.51 kg/ha) and height (RMSEP ± 708.13 kg/ha). Based on the results of the study it was concluded the use of combined LiDAR and active optical reflectance sensors can help unlock the complex interrelationship between green fraction and biomass in swards containing both green and senescent material. View Full-Text
Keywords: active optical sensor (AOS); LiDAR; pasture biomass; tall fescue active optical sensor (AOS); LiDAR; pasture biomass; tall fescue
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Schaefer, M.T.; Lamb, D.W. A Combination of Plant NDVI and LiDAR Measurements Improve the Estimation of Pasture Biomass in Tall Fescue (Festuca arundinacea var. Fletcher). Remote Sens. 2016, 8, 109.

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