# Vegetation Indices Combining the Red and Red-Edge Spectral Information for Leaf Area Index Retrieval

#### Abstract

Leaf area index (LAI) is a crucial biophysical variable for agroecosystems monitoring. Conventional vegetation indices (VIs) based on red and near infrared regions of the electromagnetic spectrum, such as the normalized difference vegetation index (NDVI), are commonly used to estimate the LAI. However, these indices commonly saturate at moderate-to-dense… (More)