Results 21 to 30 of about 375,454 (207)

A Simulation Study Using Terrestrial LiDAR Point Cloud Data to Quantify Spectral Variability of a Broad-Leaved Forest Canopy

open access: yesSensors, 2018
In this analysis, a method for construction of forest canopy three-dimensional (3D) models from terrestrial LiDAR was used for assessing the influence of structural changes on reflectance for an even-aged forest in Belgium.
Renato Cifuentes   +4 more
doaj   +1 more source

Metsa lehepinnaindeksi kaardistamine lennukilidari, satelliidipiltide ja maapealsete mõõtmiste abil Järvselja VALERI testalal / Leaf area index mapping with airborne lidar, satellite images and ground measurements in Järvselja VALERI test site

open access: yesMetsanduslikud Uurimused, 2011
The aim of this study was to compile the leaf area index (LAI) map of a 3×3 km VALERI test site in Järvselja, Estonia. Canopy transmittance measurements of LAI by LAI-2000 Plant Canopy Analyzers and digital cameras supplied with fisheye converters were ...
Kodar Ave   +5 more
doaj   +1 more source

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

Assessment of morphological attributes of Guava tree for design of a novel tunnel spraying system

open access: yesEnvironment Conservation Journal
The morphological attributes play a significant role in determining the level of applied insecticide by the existing spraying system. Therefore, this attempt was made to assess the various morphological attributes of guava tree such as leaf size, leaf ...
Jagjeet Singh   +5 more
doaj   +1 more source

Retrieving leaf area index from multi-angular airborne data

open access: yesAnnals of Geophysics, 2006
This work is aimed to demonstrate the feasibility of a methodology for retrieving bio-geophysical variables whilst at the same time fully accounting for additional information on directional anisotropy.
J. Meliá   +2 more
doaj   +1 more source

Leaf area index estimation using top-of-canopy airborne RGB images

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2021
Leaf Area Index (LAI) is one of the most important biophysical properties of a crop, used in detecting long-term water stress, estimating biomass, and identifying crop growth stage.
Rahul Raj   +5 more
doaj   +1 more source

Regional‐Scale Relationships of Leaf Area Index to Specific Leaf Area and Leaf Nitrogen Content

open access: yesEcological Applications, 1994
Specific leaf area (SLA) is an important link between vegetation water and carbon cycles because it describes the allocation of leaf biomass per unit of leaf area. Several studies in many vegetation types have shown that canopy SLA is closely related to canopy leaf nitrogen (N) content and photosynthetic capacity.
Lars L. Pierce   +2 more
openaire   +2 more sources

Use of giant reed (Arundo donax L.) to control soil erosion and improve soil quality in a marginal degraded area

open access: yesItalian Journal of Agronomy, 2020
Soil erosion is one of the biggest environmental problems throughout European Union causing considerable soil losses. Vegetation cover provides an important soil protection against runoff and soil erosion.
Donato Visconti   +7 more
doaj   +1 more source

Spatial and temporal variations in leaf area index, specific leaf area and leaf nitrogen of two co-occurring savanna tree species [PDF]

open access: yesTree Physiology, 2004
Foliage growth, mass- and area-based leaf nitrogen concentrations (Nm and N a) and specific leaf area (SLA) were surveyed during a complete vegetation cycle for two co-occurring savanna tree species: Crossopteryx febrifuga (Afzel. ex G. Don) Benth. and Cussonia arborea A. Rich.
Simioni, Guillaume   +4 more
openaire   +5 more sources

Mowing and lowering the marandu palisadegrass sward height at late winter improve the sward structure

open access: yesBioscience Journal, 2020
The structure of the sward is important because it influences the responses of plants and animals in grazing conditions. The objective with this work was to evaluate the structural characteristics of the Marandu palisade grass pasture (Brachiaria ...
Manoel Eduardo Rozalino Santos   +7 more
doaj   +1 more source

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