Results 21 to 30 of about 106,533 (338)

Sentinel Image to Estimate Industrial Tomato Leaf Area Index

open access: yesBrazilian Archives of Biology and Technology, 2023
The Leaf Area Index (LAI) is one of the main physiological parameters of the plant related to transpiration, productivity and rainfall interception. Among the methods to determine the LAI, the use of remote sensing that estimates the LAI through image ...
Mylena Marques Dorneles   +3 more
doaj   +1 more source

Mapping mangrove leaf area index (LAI) by combining remote sensing images with PROSAIL‐D and XGBoost methods

open access: yesRemote Sensing in Ecology and Conservation, 2022
Leaf area index (LAI) is a vital parameter reflecting vegetation structure, physio‐ecological process and growth development. Accurate estimation of mangrove LAI is fundamental for assessing the ecological restoration and sustainable development of ...
Demei Zhao   +9 more
semanticscholar   +1 more source

Evaluation of Leaf Area Index (LAI) of Broadacre Crops Using UAS-Based LiDAR Point Clouds and Multispectral Imagery

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Leaf area index (LAI) is an established structural variable that reflects the three-dimensional (3-D) leaf layering of vegetation in response to environmental inputs.
Fei Zhang   +4 more
semanticscholar   +1 more source

Estimating Urban Leaf Area Index (LAI) of Individual Trees with Hyperspectral Data

open access: hybridPhotogrammetric Engineering & Remote Sensing, 2012
This study estimated leaf area index (LAI) of individual urban trees as a function of spectral features derived from airborne hyperspectral data. Candidate features included spectral indexes, principal components, and calibrated reflectance values. Hyperspectral images were acquired over Provo, Utah area, and LAI of 204 deciduous trees was measured in ...
Ryan R. Jensen   +2 more
openalex   +2 more sources

Comparison of LiDAR-based Models for True Leaf Area Index and Effective Leaf Area Index Estimation in Young Beech Forests

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2020
The leaf area index (LAI) is one of the most common leaf area and canopy structure quantifiers. Direct LAI measurement and determination of canopy characteristics in larger areas is unrealistic due to the large number of measurements required to create ...
Zdeněk Patočka   +5 more
doaj   +1 more source

Defoliation intensity and leaf area index recovery in defoliated swards: implications for forage accumulation

open access: yesScientia Agricola, 2020
: This study evaluated the leaf area index (LAI) recovery mechanisms and forage accumulation rates on the regrowth of different grass species subjected to different defoliation intensities. For that purpose, plots of Pennisetum clandestinum (kikuyugrass),
Clóvis David Medeiros Martins   +4 more
doaj   +1 more source

Retrieval and validation of vertical LAI profile derived from airborne and spaceborne LiDAR data at a deciduous needleleaf forest site

open access: yesGIScience & Remote Sensing, 2023
Leaf area index (LAI) is defined as one half of the total green leaf area per unit ground surface area. Its vertical profile is critical for understanding the remote sensing radiative transfer processes.
Yao Wang   +6 more
doaj   +1 more source

Delete---ICESat-2 leaf area index (LAI) Retrieval Comparisons

open access: yes, 2021
This is the first release of the LAI used for the submitted paper: Guo et al., 2021: Exploring photon-counting laser altimeter ICESat-2 in retrieving LAI and correcting clumping effect. The grid LAI derived from airborne LiDAR data was used to validate the LAI derived from ICESat-2, which has been validated by the field measurements and has the spatial
Guo, Da, Hu, Ronghai
openaire   +1 more source

Estimate of leaf area index in an old-growth mixed broadleaved-Korean pine forest in northeastern China. [PDF]

open access: yesPLoS ONE, 2012
Leaf area index (LAI) is an important variable in the study of forest ecosystem processes, but very few studies are designed to monitor LAI and the seasonal variability in a mixed forest using non-destructive sampling. In this study, first, true LAI from
Zhili Liu, Guangze Jin, Yujiao Qi
doaj   +1 more source

ICESat-2 leaf area index (LAI) Retrieval Comparisons

open access: yes, 2021
This dataset can be used to reproduce the results in the paper entitled “Exploring photon-counting laser altimeter ICESat-2 in retrieving LAI and correcting clumping effect.” By Guo et al. LAI derived from ICESat-2: Leaf Area Index (LAI) derived from ICESat-2 ATL03 data with a segment of 200 m. Validation data: The 5-m resolution grid LAIs come from Hu
Guo, Da, Hu, Ronghai
openaire   +1 more source

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