Results 21 to 30 of about 4,971,302 (317)
Active-Optical Sensors Using Red NDVI Compared to Red Edge NDVI for Prediction of Corn Grain Yield in North Dakota, U.S.A. [PDF]
Sensors, 2015 Active-optical sensor readings from an N non-limiting area standard established within a farm field are used to predict yield in the standard. Lower yield predictions from sensor readings obtained from other parts of the field outside of the N non ...
Lakesh K. Sharma +3 more
doaj +2 more sources
Ground versus aerial canopy reflectance of corn: Red‐edge and non‐red edge vegetation indices [PDF]
Agronomy Journal, 2021 AbstractConstant‐rate blanket applications of fertilizer N can result in both an over and under supply relative to crop utilization on a field‐by‐field basis. Variable‐rate (VR) applications tailored to better meet crop demand can improve N use efficiency on spatially variable soils.
Zachary Sumner +5 more
openaire +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023 As an essential vegetation biophysical trait that determines the plant's structure and photosynthetic capacity, characterizing of leaf area index (LAI) is important for vegetation growth and health monitoring.
Yuanheng Sun, Binyu Wang, Zhaoxu Zhang
semanticscholar +1 more source
A novel red‐edge spectral index for retrieving the leaf chlorophyll content
Methods in Ecology and Evolution, 2022 The leaf chlorophyll content (Chlleaf) is a crucial vegetation parameter in carbon cycle modelling and agricultural monitoring at local, regional and global scales. The red‐edge spectral region is sensitive to variations in Chlleaf.
Hu Zhang +15 more
semanticscholar +1 more source
Scientific Reports, 2022 Despite the long-standing interest in the organization of ant communities across elevational gradients, few studies have incorporated the evolutionary information to understand the historical processes that underlay such patterns.
Gibran Renoy Pérez-Toledo +5 more
doaj +1 more source
Astronomy & Astrophysics, 2002 With a time-series CCD photometric survey, we have demonstrated clearly that the observed red edge for the ZZ Ceti stars instability strip at 11 000 K is real, with the pulsation amplitude decreasing at least by a factor of 50. Previous surveys for variability among hydrogen atmosphere white dwarfs around 11 000 K have been carried out using time ...
Kanaan, A., Kepler, S. O., Winget, D. E.
openaire +2 more sources
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 This article aims to explore the applicability of SMMI (soil moisture monitoring index), MSMMI (modified soil moisture monitoring index), PDI (perpendicular drought index), and MPDI (modified perpendicular drought index) in estimating soil moisture (SM ...
Ying Liu, Jiaxin Qian, H. Yue
semanticscholar +1 more source
Improved red-edge chlorophyll-a detection for Sentinel 2
, 2021 Chlorophyll-a (chl-a) concentration is an indicator of algal biomass. The Sentinel 2 platform offers greatly improved spatial resolution over other satellite platforms designed for water based chl-a retrievals and includes a “red-edge” band at 704 nm not
James M. Bramich, C. Bolch, A. Fischer
semanticscholar +1 more source
Geomatics, Natural Hazards & Risk, 2022 Few studies of monitoring rocky desertification based on Sentinel-2 MSI image with higher spatial and temporal resolutions have been reported. In this paper, nine typical surface parameters that derived from Sentinel-2 MSI image including three red edge ...
Bing Guo +3 more
semanticscholar +1 more source
Mapping Seasonal Leaf Nutrients of Mangrove with Sentinel-2 Images and XGBoost Method
Remote Sensing, 2022 Monitoring the seasonal leaf nutrients of mangrove forests helps one to understand the dynamics of carbon (C) sequestration and to diagnose the availability and limitation of nitrogen (N) and phosphorus (P).
Jing Miao +7 more
doaj +1 more source