TY - JOUR T1 - Canopy-Level Photochemical Reflectance Index from Hyperspectral Remote Sensing and Leaf-Level Non-Photochemical Quenching as Early Indicators of Water Stress in Maize JO - Remote Sensing PY - 2017/08/01 AU - Chou S AU - Chen J AU - Yu H AU - Chen B AU - Zhang X AU - Croft H AU - Khalid S AU - Li M AU - Shi Q ED - DO - DOI: 10.3390/rs9080794 PB - MDPI AG VL - 9 IS - 8 SP - 794 EP - 794 Y2 - 2025/06/21 ER -