نتایج جستجو برای: vegetation indices

تعداد نتایج: 127108  

Journal: :Environmental pollution 2015
Paul Arellano Kevin Tansey Heiko Balzter Doreen S Boyd

The global demand for fossil energy is triggering oil exploration and production projects in remote areas of the world. During the last few decades hydrocarbon production has caused pollution in the Amazon forest inflicting considerable environmental impact. Until now it is not clear how hydrocarbon pollution affects the health of the tropical forest flora. During a field campaign in polluted a...

Journal: :International Journal of Advanced Computer Science and Applications 2023

The world’s ecosystem and environment are rapidly deteriorating with an increase in the depletion of forest conditions due to fires. In recent past years, wildfire incidents Sikkim have increased severe climatic changes such as turbulent rainfall, untimely summers, extreme droughts winters, a reduction percentage yearly rainfall. Forest fires one numerous kinds disasters that impose disastrous ...

Journal: :International Journal of Remote Sensing and Earth Sciences (Denpasar) 2023

Land cover will change due to population pressure, resource use, and human interest in space. Measuring the land area is important determine how much-converted positive negative. The vegetation on was determined by densely plants were spread out. This study conducted Palabuhanratu, Sukabumi Regency. Aims test compare accurate EVI SAVI are at seeing density. images used from Landsat 8 2018 2022....

1999
Alfredo Huete Chris Justice Wim van Leeuwen

One of the primary interests of the Earth Observing System (EOS) program is to study the role of terrestrial vegetation in large-scale global processes with the goal of understanding how the Earth functions as a system. This requires an understanding of the global distribution of vegetation types as well as their biophysical and structural properties and spatial/temporal variations. Vegetation ...

2007
B. Prasad B. F. Carver M. L. Stone M. A. Babar W. R. Raun A. R. Klatt

Selection criteria that can facilitate grain yield improvement would be considered important plant breeding tools. We assessed the value of spectral refl ectance indices (SRI) as indirect selection tools for grain yield improvement in winter wheat (Triticum aestivum L.). The objectives of this study were to estimate genetic correlation between SRI and grain yield, heritability, response to sele...

2012
K. Uto Y. Kosugi

There are high demands for water content estimation in vegetation, e.g. water-stress control for sweet crops, forest disease monitoring and drought monitoring. In this paper, normalized difference-based and ratio-based water stress indices by means of hyperspectral information from NIR to SWIR, spectral ranges of InGaAs sensor, are introduced to facilitate realizing simple measurement system at...

Journal: :international journal of advanced biological and biomedical research 0
zahra bayat m.sc. student of desertification, faculty of natural resources, university of semnan, semnan, iran seyed hassan kaboli assistance professor of desertification, faculty of natural resources, semnan university, iran mohammad rahimi assistance professor of desertification, faculty of natural resources, semnan university, iran shima nikoo ph.d of desertification, faculty of natural resources, university of semnan, semnan, iran mohammadkia kianian instructor of desertification, faculty of natural resources, university of semnan, semnan, iran neda soleiman dehkordi m.sc. student of desertification, faculty of natural resources, university of semnan, semnan, iran

desertification could be traced back to one or many factors. thus, to cope with such a phenomenon, there exists a need for a profound understanding of the processes and the causes. the study area of the current paper is the extent of shahrekord’s marghzar as an important case amongst the important ones of the province. in order to evaluate the roots of desertification in the area, the iranian m...

2007
Stephanie Delalieux Jan A. N. van Aardt Pablo J. Zarco-Tejada Pieter Kempeneers Willem W. Verstraeten Pol Coppin

This research was conducted to assess the potential of hyperspectral indices to detect iron deficiency in capital-intensive multi-annual crop systems. A well-defined hyperspectral multi-layer dataset was constructed for a peach orchard in Zaragoza, Spain, consisting of hyperspectral measurements at various monitoring levels (leaf, crown, airborne). Trees were subjected to four different treatme...

Journal: :IEEE Access 2023

Vegetation indexes help perform precision farming because they provide useful information regarding moisture, nutrient content, and crop health. Primary sources of those are satellites unmanned aerial vehicles equipped with expensive multispectral sensors. Reducing the price obtaining such would increase availability farming. Several studies have proposed deep neural network methods to estimate...

Journal: :American Journal of Applied Mathematics 2021

Forest dynamics is mostly concerned with the changes in forest structure and composition over time, including its behavior response to anthropogenic natural destructions which one of primary evidence change. This study presents vegetation pattern formation taken into account all interaction measure indices such as light, water, temperature nutrients fertility. Michaelis-Menten Kinetics a Contin...

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