Results 21 to 30 of about 5,783 (249)

Avaliação de uma metodologia prática para o mapeamento de plantas daninhas Evaluation of a practical methodology for weed mapping

Revista Brasileira de Engenharia Agrícola e Ambiental, 2001
Está sendo desenvolvida uma nova tecnologia, chamada Agricultura de Precisão e, com ela, vêm surgindo novos equipamentos, capazes de realizar a aplicação localizada de defensivos.
Luiz A. Balastreire, Fábio H.R. Baio
doaj   +1 more source

Semi-supervised Learning for Weed and Crop Segmentation Using UAV Imagery

Frontiers in Plant Science, 2022
Weed control has received great attention due to its significant influence on crop yield and food production. Accurate mapping of crop and weed is a prerequisite for the development of an automatic weed management system. In this paper, we propose a weed
Chunshi Nong, Chunshi Nong, Xijian Fan, Junling Wang   +3 more
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Mapping Invasive Rumex obtusifolius in Grassland Using Unmanned Aerial Vehicle

Proceedings, 2019
Rumex obtusifolius (R. obtusifolius) is one of the most common non-cultivated. [...]
Olee Hoi Ying Lam, Bethany Melville, Marcel Dogotari, Moritz Prüm, Hemang Narendra Vithlani, Corinna Roers, Rolf Becker, Frank Zimmer   +7 more
doaj   +1 more source

Determination of Spatial Weed Variability for Precision Spraying

Journal of Agricultural Sciences, 2005
Weeds are patchy because weed spread, survival and reproduction are variable within a field and over time. Weed patches stay in about the same place from year to year, even though weed density within a patch may vary.
Ufuk Türker
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Mapping QTL hotspots associated with weed competitive traits in backcross population derived from Oryza sativa L. and O. glaberrima Steud.

Scientific Reports, 2020
To improve grain yield under direct seeded and aerobic conditions, weed competitive ability of a rice genotype is a key desirable trait. Hence, understanding and dissecting weed competitive associated traits at both morphological and molecular level is ...
Muralidhara Bharamappanavara, Anantha M. Siddaiah, Senguttuvel Ponnuvel, Lokesha Ramappa, Basavaraj Patil, Manoj Appaiah, Sheshu Madhav Maganti, Raman Meenakshi Sundaram, Shashidhar Kadadanamari Shankarappa, Mangal Deep Tuti, Sreedevi Banugu, Brajendra Parmar, Santosha Rathod, Kalyani M. Barbadikar, Suneetha Kota, Lella Venkata Subbarao, Tapan Kumar Mondal, Gireesh Channappa   +17 more
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Field-scale variability of weediness on arable land

Plant, Soil and Environment, 2004
Weed mapping was conducted on 2 fields in Central Bohemia to characterize the spatial structure and temporal stability of weed populations over four years (1999-2002).
P. Hamouz, J. Soukup, J. Holec, M. Jursík   +3 more
doaj   +1 more source

Quantifying Efficacy and Limits of Unmanned Aerial Vehicle (UAV) Technology for Weed Seedling Detection as Affected by Sensor Resolution

Sensors, 2015
In order to optimize the application of herbicides in weed-crop systems, accurate and timely weed maps of the crop-field are required. In this context, this investigation quantified the efficacy and limitations of remote images collected with an unmanned
José M. Peña, Jorge Torres-Sánchez, Angélica Serrano-Pérez, Ana I. de Castro, Francisca López-Granados   +4 more
doaj   +1 more source

Field coverage and weed mapping by UAV swarms

2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2017
The demands from precision agriculture (PA) for high-quality information at the individual plant level require to re-think the approaches exploited to date for remote sensing as performed by unmanned aerial vehicles (UAVs). A swarm of collaborating UAVs may prove more efficient and economically viable compared to other solutions. To identify the merits
Albani, Dario, Albani, Dario, Nardi, Daniele, Trianni, Vito   +3 more
openaire   +5 more sources

Mapeamento da distribuição espacial da infestação de Panicum maximum durante a colheita da cultura de milho Mapping of the spatial distribution of Panicum maximum during corn harvesting

Planta Daninha, 2004
Metodologias de mapeamento de plantas daninhas em áreas agrícolas estão sendo utilizados a fim de gerar mapas de aplicação localizada de herbicidas, sendo que, este mapeamento vem sendo feito através de ferramentas da agricultura de precisão.
L.S. Shiratsuchi, J.P. Molin, P.J. Christoffoleti   +2 more
doaj   +1 more source

Spatial Modelling of Within-Field Weed Populations; a Review

Agronomy, 2020
Concerns around herbicide resistance, human risk, and the environmental impacts of current weed control strategies have led to an increasing demand for alternative weed management methods.
Gayle J. Somerville, Mette Sønderskov, Solvejg Kopp Mathiassen, Helen Metcalfe   +3 more
doaj   +1 more source