Results 1 to 10 of about 5,178,293 (354)
Monitoring Leaf Nitrogen Accumulation With Optimized Spectral Index in Winter Wheat Under Different Irrigation Regimes. [PDF]
Front Plant Sci, 2022 Rapid and non-destructive estimation of leaf nitrogen accumulation (LNA) is essential to field nitrogen management. Currently, many vegetation indices have been used for indicating nitrogen status.
Sun H +8 more
europepmc +2 more sources
Remote Sensing, 2022 Integrating satellite data at different resolutions (i.e., spatial, spectral, and temporal) can be a helpful technique for acquiring soil information from a synoptic point of view.
Anis Gasmi +4 more
doaj +2 more sources
Developing a New Spectral Index for Detecting Cadmium-Induced Stress in Rice on a Regional Scale. [PDF]
Int J Environ Res Public Health, 2019 In natural farmland ecosystems, cadmium (Cd) pollution in rice has attracted increasing attention because of its high toxicity, relative mobility, and high water solubility. This study aims to develop a spectral index for detecting Cd stress in rice on a
Wu C, Liu M, Liu X, Wang T, Wang L.
europepmc +2 more sources
New Spectral Index for Detecting Wheat Yellow Rust Using Sentinel-2 Multispectral Imagery. [PDF]
Sensors (Basel), 2018 Yellow rust is one of the most destructive diseases for winter wheat and has led to a significant decrease in winter wheat quality and yield. Identifying and monitoring yellow rust is of great importance for guiding agricultural production over large ...
Zheng Q, Huang W, Cui X, Shi Y, Liu L.
europepmc +2 more sources
Variability Timescale and Spectral Index of Sgr A* in the Near Infrared: Approximate Bayesian Computation Analysis of the Variability of the Closest Supermassive Black Hole. [PDF]
Astrophys J, 2018 Sagittarius A* (Sgr A*) is the variable radio, near-infrared (NIR), and X-ray source associated with accretion onto the Galactic center black hole. We present an analysis of the most comprehensive NIR variability data set of Sgr A* to date: eight 24 hr ...
Witzel G +18 more
europepmc +3 more sources
Agronomy, 2022 Leaf area index (LAI) and above-ground biomass are both vital indicators for evaluating crop growth and development, while rapid and non-destructive estimation of crop LAI and above-ground biomass is of considerable significance for crop field management.
Zijun Tang +12 more
doaj +2 more sources
NANOGrav spectral index
Physical Review D, 2023 We discuss cosmic domain walls described by a tension red-shifting with the expansion of the Universe. These melting domain walls emit gravitational waves with the low-frequency spectral shape $\Omega_{gw}\propto f^{2}$ corresponding to the spectral ...
E. Babichev +4 more
semanticscholar +1 more source
Agronomy, 2023 Chlorophyll is an important component of crop photosynthesis as it is necessary for the material exchange between crops and the atmosphere. The amount of chlorophyll present reflects the growth and health status of crops.
Hongzhao Shi +10 more
semanticscholar +1 more source
Sensors, 2021 The accurate estimation and timely diagnosis of crop nitrogen (N) status can facilitate in-season fertilizer management. In order to evaluate the performance of three leaf and canopy optical sensors in non-destructively diagnosing winter wheat N status ...
Jie Jiang +8 more
doaj +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