Consulta: subjectFacets:"Deposition"
Registros recuperados: 10
Data/hora: 01/06/2024 14:12:03

SPRAYING QUALITY OF CROP PROTECTION PRODUCTS USING TWO DROPLET SPECTRA IN THREE PERIODS OF THE DAY
Provedor de dados: 70
Autores: Graziano,Carlos E. P. L.; Alves,Karina A.; Gandolfo,Marco A.; Dario,Gustavo; Oliveira,Rone B.
ABSTRACT: Spraying of crop protection products can be affected by weather conditions and spray nozzles, altering deposition patterns and coverage of the target surface. The objective of this research was to analyze the quality of sprayings performed in three periods of the day (9:00 am, 2:00 pm, and 6:00 pm), using two different droplet sizes (fine and coarse) in soybeans. Coverage and deposition were evaluated in the upper, middle, and lower portion of soybean canopy. Spraying the products at 2:00 pm increased leaf coverage in the medium portion but also increased losses to the soil. Spray nozzles with fine droplet sizes provided greater coverage and deposition in the medium and upper portion of the crop for the sprayings performed in the morning. If...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coverage; Deposition; Endo-drift; Spraying time; Application technology.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601183

Calibration of angles of nozzles and deposition of an axial-flow sprayer on dwarf cashew
Provedor de dados: 70
Autores: Mion,Renildo L.; Sousa,Beatriz M. de; Cordeiro,Igor M.; Sombra,Weberte A.; Duarte,José M. de L.; Lucas,Fidel C. B.
The study aimed to determine an optimum angle for the nozzles axial-flow sprayers a deposition for better vertical distribution focused on cashew. In laboratory tests were conducted adjusting the angle of the nozzle axial-flow sprayers. The experimental design was randomized blocks in a 2x3 factorial with four replications. The treatment for this test were two settings (with and without the adjustment of the angles of the nozzles ) and tree application volumes 273, 699 and 954 L ha-¹.The study was conducted in an orchard of dwarf cashew, with eight years of age. It was concluded that the volumetric distribution profile showed better vertical distribution uniformity when the angles of the nozzles were regulated for the canopy, the adjustment of the angles...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fruit; Deposition; Vertical patternator.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000400020

Sowing performance by a metering mechanism of continuous flow in different slope conditions
Provedor de dados: 70
Autores: CORREIA,TIAGO P. DA S.; SOUSA,SAULO F. G. DE; SILVA,PAULO R. A.; DIAS,PATRÍCIA P.; GOMES,ANDERSON R. A.
ABSTRACT One of the reasons for the success of a productive culture is the correct sowing. Therefore, the seeds must be properly dosed, deposited and not damaged by the metering mechanism of the seed drill. So, the aim of this study was to evaluate in a simulator the sorghum seed deposition by a metering mechanism with continuous flow in different conditions of slope and sowing speed, and evaluate the quality of the deposited seeds assessing mechanical damage and germination. The experiment was carried out at the College of Agricultural Sciences, UNESP in Botucatu-SP, being used a simulator equipped with seed metering mechanism of helical channelled rotor type. The experimental design was randomized in a 3 x 2 factorial arrangement with six replications....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deposition; Germination; Mechanical damage; Sowing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500839

Impacto do sedimento sobre o desenvolvimento do perifíton no Rio Taquari, Pantanal, MS.
Provedor de dados: 14
Autores: OLIVEIRA, M. D. de; RODRIGUES, L.
As macrófitas aquáticas são muito abundantes em áreas alagadas como as do Pantanal, e fornecem um vasto substrato para a microbiota, em particular para a comunidade perifítica. Foi avaliado o efeito da deposição de sedimento sobre a comunidade perifítica ao longo de 40km do trecho final do rio Taquari, em 12 estações de amostragem, em setembro de 1998. Foram coletados pecíolos de Eichhornia azurea, raspados e filtrados para análise da biomassa perifítica (clorofila a e peso seco). Foram tomadas amostras de raízes, caules e folhas da macrófita para análise do sedimento aderido. E as características da água também foram estudadas. Do sedimento suspenso analisado, 55% foi depositado até a última estação, e 86% é de origem inorgânica. A transparência da água...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Deposição; Macrófita aquática; Rio Taquari; Sediment; Deposition; Aquatic macrophyte; Aquatic plant; Taquari river; Wetland.; Impacto Ambiental; Perifiton; Planta Aquatica; Sedimento.; Pantanal; Environmental impact; Periphyton.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/810756

Neogene evolution of the mixed carbonate-siliciclastic system in the Gulf of Papua, Papua New Guinea
Provedor de dados: 5
Autores: Tcherepanov, Evgueni N.; Droxler, Andre W.; Lapointe, Philippe; Dickens, Gerald R.; Bentley, Sam J.; Beaufort, Luc; Peterson, Larry C.; Daniell, James; Opdyke, Bradley N.
This paper outlines the evolution of the late Cenozoic mixed carbonate-siliciclastic depositional system in the Gulf of Papua (GoP), using seismic, gravity, multibeam bathymetry, well data sets, and Landsat imagery. The deposition of the mixed sedimentary sequences was influenced by dynamic interplay of tectonics, eustasy, in situ carbonate production, and siliciclastic sediment supply. The roles of these major factors are estimated during different periods of the GoP margin evolution. The Cenozoic mixed system in the GoP formed in distinct phases. The first phase ( Late Cretaceous-Paleocene) was mostly driven by tectonics. Rifting created grabens and uplifted structural blocks which served later as pedestals for carbonate edifices. Active neritic...
Tipo: Text
Palavras-chave: Great barrier reef; Sea level; Tectonic controls; Ice volume; Platforms; Sedimentation; Fluctuations; Deposition; Australia; Foreland basin.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00208/31939/30357.pdf

Modelling mud transport in a macrotidal estuary
Provedor de dados: 5
Autores: Le Hir, Pierre; Bassoullet, Philippe; L'Yavanc, Jacky.
In order to determine the fate of the fine particles and adsorbed contaminants in·a short macrotidal èstuary, a mathematical modelling system for cohesive suspended mater transport and bottom evolution, including a new consolidation algorithm, is developed. An analysis of successive erosion, transport and deposi~ion processes due to tidal forcing is given and comparisons with field data are provided. A description of mean-term bottom variations has been attempted and is partially validated by differential soundings.
Tipo: Text
Palavras-chave: Dynamique des sédiments cohésifs; Estuaire Morlaix; Tassement des vases; Modèle mathématique; Érosion; Dépôt; Cohesive sediment dynamics; Estuary; Erosion; Deposition; SoiT consolidation; Mathematical modelling.
Ano: 1988
URL: https://archimer.ifremer.fr/doc/00682/79379/81909.pdf

Energy and protein nutritional requirements for Nellore bulls
Provedor de dados: 96
Autores: Silva,Luiz Fernando Costa e; Valadares Filho,Sebastião de Campos; Zanetti,Diego; Rotta,Polyana Pizzi; Marcondes,Marcos Inácio; Prados,Laura Franco; Paulino,Mário Fonseca; Azevedo,Henrique de Oliveira.
The objective of this study was to determine the nutritional requirements of energy and protein and estimate the efficiencies of metabolizable energy utilization for fat and protein deposition, as well as for maintenance (k m) and growth (k g). An experiment of comparative slaughter was carried out with thirty-seven 14-month-old (±1 month) Nellore bulls with 259±24.9 kg. Animals were divided as follows: five to reference, four to maintenance level and twenty-eight bulls feeding ad libitum. Bulls were also grouped in 4 different feedlot periods (42, 84, 126 and 168 days) for slaughter. The diet was composed of corn silage and concentrate, at a 55:45 ratio. After the slaughter, the left half carcasses were totally dissected for determination of body...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deposition; Efficiency; Growth; Maintenance; Metabolizable energy.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000600028

Sediment morphology and distribution in a restored riparian forest
Provedor de dados: 63
Autores: Momoli,Renata Santos; Cooper,Miguel; Castilho,Selene Cristina de Pierri.
Sediment distribution patterns of riparian zones reflect the deposition dynamics and the type of deposition event. The purpose of this study is to characterize the morphology and distribution of sediments deposited in a restored riparian forest that were transported from adjacent areas cropped with sugar-cane. In order to study the deposition processes in a riparian forest located in the county of Iracemápolis state of São Paulo, Brazil, soil samples were collected on a transect for micromorphological as well as particle size distribution analyses, using Folk &amp;amp; Ward statistical parameters. Soil samples were dispersed with NaOH + sodium hexametaphosphate and water. The dispersion in water was made to simulate field transport conditions. Particle...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Deposition; Particle size distribution; Image analysis.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500006

The mixture volume sprayed by hydraulic and centrifugal energy nozzles for the control of Asian soybean rust
Provedor de dados: 1
Autores: Costa, Lilian Lúcia; Ferreira, Marcelo da Costa; Campos, Henrique Borges Neves; Carvalho, Giorge Gomes França de; Barbosa, José Carlos.
The objective of this work was to evaluate a means of controlling ASR (Phakopsora pachyrhizi H. Sydow &amp; P. Sydow) by applying reduced fungicide volumes in association with spray nozzles using either hydraulic or centrifugal energy. Two experiments resulted from that objective: soybean plants (Glycine max (L.) Merril) of the ‘BRS Valiosa RR’ cultivar were grown at the Experimental Farm of the University of São Paulo State (Unesp) in Jaboticabal, Brazil. The treatments were distributed in the field according to a randomized complete block design with four replications. The treatments consisted of the volumes of 50, 100, and 150 L ha-1 (droplets resulting from hydraulic energy) and 17, 35, and 50 L ha-1 (droplets resulting from centrifugal energy). An...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spray nozzle; Coverage; Deposition; Glycine max; Phakopsora pachyrhizi; Disease severity.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19598

Spatial distribution of pollen grains and spores in surface sediments of Guanabara Bay, Rio de Janeiro, Brazil
Provedor de dados: 42
Autores: Barreto,Cintia F.; Vilela,Claudia G.; Baptista-Neto,José A.; Barth,Ortrud M.
Aiming to investigate the deposition of pollen grains and spores in Guanabara Bay, Rio de Janeiro State, 61 surface sediment samples were analyzed. The results showed that the current deposition of palynomorphs in surface sediments of Guanabara Bay represents the regional vegetation of this hydrographic basin. The differential distribution of palynomorphs followed a pattern influenced by bathymetry, tidal currents speed, discharge of numerous rivers, and by human activity. The dominance of representatives of Field Vegetation reflects the changes of the original flora caused by intense human activities in the region. The continued presence and richness of pollen types of rain forest in the samples indicates that their source area might be the vegetation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Palynomorphs; Surface sediments; Deposition; Preservation; Guanabara Bay; Brazil.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300006