Evaluation of wheat growth monitoring methods based on hyperspectral data in Western Australia

Approximately 90% of wheat consumed in Japan is imported from such countries as the United States (the U.S.) and Australia. Therefore, Australia plays an important role to ensure food security of Japan. This study attempted to make development of growth monitoring application of Australian wheat using both ground measurement hyperspectral data (FieldSpec) and airborne hyperspectral data (HyMap). As a result, estimation of head moisture and leaf area index (LAI) of the wheat was achieved by using the hyperspectral data acquired in the late grain filling period. This attempt also made it possible to visualize a growth situation of the wheat over a wide area. In this study, the multiple regression analysis achieved the most suitable estimation results among various indices.