TY  - JOUR
AU  - Wilke, Norman
AU  - Siegmann, Bastian
AU  - Klingbeil, Lasse
AU  - Burkart, Andreas
AU  - Kraska, Thorsten
AU  - Muller, Onno
AU  - van Doorn, Anna
AU  - Heinemann, Sascha
AU  - Rascher, Uwe
TI  - Quantifying Lodging Percentage and Lodging Severity Using a UAV-Based Canopy Height Model Combined with an Objective Threshold Approach
JO  - Remote sensing
VL  - 11
IS  - 5
SN  - 2072-4292
CY  - Basel
PB  - MDPI
M1  - FZJ-2019-01289
SP  - 515 -
PY  - 2019
AB  - Unmanned aerial vehicles (UAVs) open new opportunities in precision agriculture and phenotyping because of their flexibility and low cost. In this study, the potential of UAV imagery was evaluated to quantify lodging percentage and lodging severity of barley using structure from motion (SfM) techniques. Traditionally, lodging quantification is based on time-consuming manual field observations. Our UAV-based approach makes use of a quantitative threshold to determine lodging percentage in a first step. The derived lodging estimates showed a very high correlation to reference data (R2 = 0.96, root mean square error (RMSE) = 7.66%) when applied to breeding trials, which could also be confirmed under realistic farming conditions. As a second step, an approach was developed that allows the assessment of lodging severity, information that is important to estimate yield impairment, which also takes the intensity of lodging events into account. Both parameters were tested on three ground sample distances. The lowest spatial resolution acquired from the highest flight altitude (100 m) still led to high accuracy, which increases the practicability of the method for large areas. Our new lodging assessment procedure can be used for insurance applications, precision farming, and selecting for genetic lines with greater lodging resistance in breeding research.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000462544500043
DO  - DOI:10.3390/rs11050515
UR  - https://juser.fz-juelich.de/record/860613
ER  -