Development and Validation of a Model to Combine NDVI and Plant Height for High-Throughput Phenotyping of Herbage Yield in a Perennial Ryegrass Breeding Program. - Alem Gebremedhin; Pieter Badenhorst; Junping Wang; Khageswor Giri; German C. Spangenberg; Kevin F. Smith (Remote. Sens., 2019)