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Brigham Young University

Theses/Dissertations

Wheat

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Remote Sensing And Spatial Variability Of Leaf Area Index Of Irrigated Wheat Fields, Austin Paul Hopkins Jun 2021

Remote Sensing And Spatial Variability Of Leaf Area Index Of Irrigated Wheat Fields, Austin Paul Hopkins

Theses and Dissertations

Leaf area index (LAI) is a versatile indicator of crop growth that is used to estimate evapotranspiration (ET), monitor nitrogen status, and estimate crop yield. Traditional methods for measuring LAI can be improved using high resolution remote sensing. The aim of this study was to compare approaches for estimating LAI from UAV-derived visible vegetation indices. Coincident ground-based and remotely sensed data were obtained from two irrigated wheat fields and were sampled at a total of 5 events in 2019 and 2020. Ground-based LAI was measured with a ceptometer and remotely sensed images were collected using a consumer-grade UAV. Mosaiced orthophotos …