Results 31 to 40 of about 7,078,741 (298)

UAV-Derived Spectral Indices for the Evaluation of the Condition of Rye in Long-Term Field Experiments

open access: yesAgriculture, 2022
The aim of the study was to evaluate the effect of various fertilization treatments, including nitrogen, potassium and phosphorus fertilization, in long-term experiments for selected UAV (unmanned aerial vehicle)-derived spectral vegetation indices (NDVI—
Elżbieta Wójcik-Gront   +2 more
doaj   +1 more source

Mapping of Mangrove Ecosystem In Segara Anakan Lagoon using Normalized Different Vegetation Index and Dominant Vegetation Index

open access: yesOmni-Akuatika, 2022
Mangrove ecosystem in Segara Anakan Lagoon (SAL) Cilacap as a typical and specific semiclosed estuary. SAL  is dominated by many species like as Rhizophora spp., Sonneratia spp., Bruguiera spp., Avicennia spp., and other species. The normalized different vegetation index (NDVI) and dominant vegetation index (DVI) are a suitable method to support the ...
Endang Hilmi   +10 more
openaire   +2 more sources

High Resolution Multispectral and Thermal Remote Sensing-Based Water Stress Assessment in Subsurface Irrigated Grapevines

open access: yesRemote Sensing, 2017
Precision irrigation management is based on the accuracy and feasibility of sensor data assessing the plant water status. Multispectral and thermal infrared images acquired from an unmanned aerial vehicle (UAV) were analyzed to evaluate the applicability
Carlos Zúñiga Espinoza   +3 more
doaj   +1 more source

Relationship between biophysical parameters and Normalized Difference Vegetation Index in maize

open access: yesJournal of Agrometeorology, 2013
A field experiment was conducted for two years during kharif season at ARI farm, Rajendranagar, Hyderabad to study the spectral reflectance pattern of maize crop and its relationship with biophysical parameters like Leaf Area Index (LAI), stover yield ...
G. JAYASREE   +3 more
doaj   +1 more source

Estimating Leaf Chlorophyll Content of Buffaloberry Using Normalized Difference Vegetation Index Sensors

open access: yesHortTechnology, 2021
Commercial optical chlorophyll meters estimate relative chlorophyll content using the ratio of transmitted red light and near-infrared (NIR) light emitted from a red light-emitting diode (LED) and an NIR LED. Normalized difference vegetation index (NDVI)
Ji-Jhong Chen, Shuyang Zhen, Youping Sun
doaj   +1 more source

Change detection in Southern Turkey using normalized difference vegetation index (NDVI)

open access: yesJournal of Environmental Engineering and Landscape Management, 2013
This study analyzed landscape changes in the Mediterranean using remotely sensed satellite images. Bitemporal Thematic Mapper (TM) scenes of Erdemli (Southern Turkey) acquired by Landsat satellites were analyzed to detect landscape changes in the study ...
Hakan Alphan, M. Ali Derse
doaj   +1 more source

Drought Monitoring With Spectral Indices Calculated From Modis Satellite Images In Hungary

open access: yesJournal of Environmental Geography, 2015
In this study a new remote sensing drought index called Difference Drought Index (DDI) was introduced. DDI was calculated from the Terra satellite’s MODIS sensor surface reflectance data using visible red, near-infrared and short-wave-infrared spectral ...
Gulácsi András, Kovács Ferenc
doaj   +1 more source

Normalized Difference Vegetation Index (NDVI) in Assessment of Grain Crop State [PDF]

open access: yesBIO Web of Conferences
The results of studying the dynamics of the NDVI of winter triticale crops in the conditions of the Northwest of Russia are presented. The NDVI was determined based on remote sensing data obtained by two methods including satellite imagery and aerial ...
Bevz Svetlana Ya.   +2 more
doaj   +1 more source

Evaluating Potential of MODIS-based Indices in Determining “Snow Gone” Stage over Forest-dominant Regions

open access: yesRemote Sensing, 2010
“Snow gone” (SGN) stage is one of the critical variables that describe the start of the official forest fire season in the Canadian Province of Alberta. In this paper, our objective is to evaluate the potential of MODIS-based indices for determining the ...
Navdeep S. Sekhon   +2 more
doaj   +1 more source

Characterization of Planetscope-0 Planetscope-1 surface reflectance and normalized difference vegetation index continuity

open access: yesScience of Remote Sensing, 2021
Planetscope data are acquired from a constellation of low-cost satellites to provide 3 ​m red, green, blue, and near infrared (NIR) data with near-daily global coverage.
H. Huang, D.P. Roy
doaj   +1 more source

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