Results 31 to 40 of about 2,158 (165)

Monitoring of Cotton Boll Opening Rate Based on UAV Multispectral Data

Remote Sensing, 2023
Defoliation and accelerating ripening are important measures for cotton mechanization, and judging the time of defoliation and accelerating the ripening and harvest of cotton relies heavily on the boll opening rate, making it a crucial factor to consider.
Yukun Wang, Chenyu Xiao, Yao Wang, Kexin Li, Keke Yu, Jijia Geng, Qiangzi Li, Jiutao Yang, Jie Zhang, Mingcai Zhang, Huaiyu Lu, Xin Du, Mingwei Du, Xiaoli Tian, Zhaohu Li   +14 more
doaj   +1 more source

Connection between spectral index values and maize grain yield measured at the crop grain-filling stage (p < 0.01; the total number of samples = 48).

, 2022
(f) EVI, (g) NDVI, (h) GNDVI, (i) RNDVI, (j) SAVI, and (k) SR (p 2, coefficient of determination; CV, coefficient of variation; EVI, enhanced vegetation index; GNDVI, green normalized difference vegetation index; NDVI, normalized difference vegetation ...
Gizachew Ayalew Tiruneh (11014578), Ayele Almaw Fenta (11174247), Enyew Adgo (546459), Derege Tsegaye Meshesha (5744858), Nigussie Haregeweyn (11014587), Atsushi Tsunekawa (379731), José Miguel Reichert (4680781)   +6 more
core   +1 more source

Remote Sensing of Yields: Application of UAV Imagery-Derived NDVI for Estimating Maize Vigor and Yields in Complex Farming Systems in Sub-Saharan Africa

Drones, 2018
The application of remote sensing methods to assess crop vigor and yields has had limited applications in Sub-Saharan Africa (SSA) due largely to limitations associated with satellite images. The increasing use of unmanned aerial vehicles in recent times
Ibrahim Wahab, Ola Hall, Magnus Jirström   +2 more
doaj   +1 more source

Análisis de los índices de vegetación NDVI, GNDVI y NDRE para la caracterización del cultivo de café (Coffea arabica) [PDF]

, 2020
Recently, vegetation indices have been used in order to determine the type of cover, with the interest of its temporal variation evaluation, or with the aim of determining the crops health status from estimation of some characteristics such as plant ...
Hoyos García, Javier, Montoya Bonilla, Bibiana, Revelo Luna, David Armando, Mejía Manzano, Julio   +3 more
core  

Algorithm for detecting deforestation and forest degradation using vegetation indices [PDF]

, 2019
In forestry sector, the remote sensing technology hold a key role on forest inventory and monitoring their changes. This paper describes the algorithm for detecting deforestation and forest degradation using high resolution satellite imageries with ...
Yuxing, Zhang; Academy of Forest Inventory and Planning, Xuenjun, Wang; Academy of Forest Inventory and Planning, Santi, Nitya Ade; Bogor Agricultural University, Sutrisno, Dewayany; Geospatial Information Agency, Jaya, I Nengah Surati; Bogor Agricultural University, Carolita, Ita; National Aeronautic and Aerospace Agency, Saleh, M. Buce; Bogor Agricultural University, Qian, Liu; Academy of Forest Inventory and Planning   +7 more
core   +1 more source

Satellite and Proximal Sensing to Estimate the Yield and Quality of Table Grapes

Agriculture, 2018
Table grapes are a crop with high nutritional value that need to be monitored often to achieve high yield and quality. Non-destructive methods, such as satellite and proximal sensing, are widely used to estimate crop yield and quality characteristics ...
Evangelos Anastasiou, Athanasios Balafoutis, Nikoleta Darra, Vasileios Psiroukis, Aikaterini Biniari, George Xanthopoulos, Spyros Fountas   +6 more
doaj   +1 more source

Estudio de la productividad y biomasa arriba del suelo, mediante el uso de índices de vegetación en plantaciones de Tectona grandis L. (Teca) ubicadas en Guanacaste, Costa Rica

Tecnología en Marcha, 2022
La estimación del volumen de la madera o de la biomasa en plantaciones forestales es una de las variables clave para la toma de decisiones del manejo forestal, para mejorar la productividad y la rentabilidad de los productos y servicios ambientales que ...
Arleth V. Porras-Granados, Dagoberto Arias-Aguilar, Casia Soto-Montoya, Vinicio Ríos-Garro   +3 more
doaj   +1 more source

Characterising fine‐scale habitat associations for range expanding species with limited data: a case study on the West Nile Virus vector, Culex modestus

Oikos, EarlyView.
The ecological and epidemiological consequences of species expanding into new areas are growing concomitantly with climate change. Those aiming to monitor species expanding in range must make optimal use of finite resources to deliver effective surveillance capable of detecting new incursions and range expansions.
Susanna Cant, Owen Jones, Maisie Vollans, Maximilian Ayling, Nyall Jamieson, Alexander G. C. Vaux, Jolyon M. Medlock, Thomas Ward, Julie Day, Robert S. Paton   +9 more
wiley   +1 more source

The response on soil temperature of vegetation in reforestation of abadoned lands [PDF]

BIO Web of Conferences
The study was conducted on the territory of the "Nasibash" site of the Eurasian carbon polygon, where 9 vegetation communities were identified. The approach to estimation and construction of soil temperature distribution maps using Landsat 8-9 space ...
Bogdan Ekaterina, Belan Larisa, Vildanov Ildar, Sayfullin Irik, Tuktarova Iren, Bakhtiyarova Roza, Nagaev Eduard, Gladkikh Sergey, Suleymanov Azamat   +8 more
doaj   +1 more source

On correlation between canopy vegetation and growth indexes of maize varieties with different nitrogen efficiencies

Open Life Sciences, 2023
Studying the canopy spectral reflection characteristics of different N-efficient maize varieties and analyzing the relationship between their growth indicators and spectral vegetation indices can help the breeding and application of N-efficient maize ...
Zhao Xia, Wang ShuaiLi, Wen Tao, Xu Jiamin, Huang Bao, Yan Shufeng, Gao Gangqiang, Zhao Yali, Li Hongping, Qiao Jiangfang, Yang Jinliang, Wu Lianhai, Wang Hongwei, Liu Tianxue, Mu Xinyuan   +14 more
doaj   +1 more source