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| Conceição,Marco Antônio Fonseca; Coelho,Rubens Duarte. |
| Experimental determination of microsprinkler droplets is difficult and time-consuming. This determination, however, could be achieved using ballistic models. The present study aimed to compare simulated and measured values of microsprinkler droplet diameters. Experimental measurements were made using the flour method, and simulations using a ballistic model adopted by the SIRIAS computational software. Drop diameters quantified in the experiment varied between 0.30 mm and 1.30 mm, while the simulated between 0.28 mm and 1.06 mm. The greatest differences between simulated and measured values were registered at the highest radial distance from the emitter. The model presented a performance classified as excellent for simulating microsprinkler drop... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation; Modeling; Simulation. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400025 |
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| Conceição,Marco Antônio Fonseca; Tonietto,Jorge. |
| The tropical north region of Minas Gerais State is one of the least developed of Brazil and viticulture could be an alternative to develop its agriculture zone. The objective of this work was to evaluate the climatic potential of that region for wine grape production. The evaluations were carried out applying the Multicriteria Climatic Classification System (Geoviticulture MCC System), that utilizes three reference climatic indexes (Dryness Index - DI, Heliothermal Index - HI and Cool Night Index - CI). Three locations - Pirapora (17º 21'S, 44º56'W, 489m), Montes Claros (16º43'S, 43º52'W, 647m) and Diamantina (18º15'S, 43º36'W, 1297m) - and two potential production cycles along the year - October to March (spring-summer period) and April to September... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Viticulture; Climatic zoning; Biometeorological index. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452005000300016 |
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| Conceição,Marco Antônio Fonseca; Tonietto,Jorge; Souza,Reginaldo Teodoro de. |
| Abstract: The objective of this work was to evaluate the performance of vineyard water indices in different grape-growing regions. The climate data used come from the historical series of weather stations located in 18 countries. The evaluated indices were the following: dryness, Zuluaga, humidity, aridity, moisture, and the grapevine water index. The grapevine water index and the indices of drought, moisture, and aridity exhibit similar performances, which makes them suitable to be used equivalently in climatological studies of grapevine regions. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis vinifera; Climatology; Evapotranspiration; Viticulture. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600765 |
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| Conceição,Marco Antônio Fonseca; Marin,Fábio Ricardo. |
| A região de Jales é uma das principais produtoras de uvas de mesa do Estado de São Paulo. As videiras da região são irrigadas e conduzidas, normalmente, no sistema latada, sendo comum, também, a utilização de coberturas com telas plásticas para a proteção contra granizo, pássaros e morcegos. Entretanto, a irrigação, o sistema de condução e a cobertura plástica podem modificar as condições microclimáticas no parreiral. O presente trabalho teve como objetivo comparar as condições meteorológicas no interior de um parreiral de uvas, na região de Jales, com as registradas a céu aberto. As avaliações foram realizadas na Estação Experimental de Viticultura Tropical da Embrapa Uva e Vinho, em Jales-SP, em uma área conduzida no sistema latada, coberta com tela... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Videira; Radiação solar; Temperatura do ar; Umidade relativa do ar. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452009000200016 |
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| Conceição,Marco Antônio Fonseca; Nachtigall,Gilmar Ribeiro; Cargnino,Camila; Fioravanço,João Caetano. |
| O objetivo do presente trabalho foi determinar a demanda hídrica e os coeficientes de cultura (Kc) para macieiras cultivadas na região de Vacaria, RS. O trabalho foi desenvolvido na Estação Experimental de Fruticultura Temperada (EEFT) da Embrapa Uva e Vinho, localizada em Vacaria, RS, em plantas da cultivar 'Royal Gala' (Malus domestica) sobre porta-enxerto M9. Foram determinados os valores do potencial matricial da água no solo, empregando-se tensiômetros de punção. Com base nesses valores, determinou-se a umidade volumétrica e o balanço hídrico mensal. O consumo hídrico da cultura variou entre 0,3mm dia-1 a 4,5mm dia-1, com média de 1,9mm dia-1. O coeficiente da cultura (Kc) apresentou tendência quadrática, variando entre 0,19 e 0,88, com média igual a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Maçã; Malus domestica; Evapotranspiração. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000300015 |
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| Souza,Reginaldo Teodoro de; Naves,Rosemeire de Lellis; Conceição,Marco Antônio Fonseca; Costa,Sabrina Marcolino da; Savini,Taynara Cruz. |
| Abstract Different application frequencies of metalaxyl + mancozeb were evaluated to control downy mildew in vine plants ‘BRS Vitória’ in two experiments conducted in Jales, São Paulo, one in the production cycle and another in branches formation cycle. In experimental design of randomized blocks, five treatments were compared (1- two weekly applications; 2- one weekly application; 3- one application every 14 days; 4- one application every 21 days; 5- applications after sporulation) with four replications, each plot with three plants. According to the analysis of the area under the disease progress curve (AUDPC), in both experiments, there were statistically significant differences between the disease control levels provided by the different treatments (P... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plasmopara viticola; Chemical control; Plant resistance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000300401 |
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| Conceição,Marco Antônio Fonseca. |
| Estimating reference evapotranspiration (ETo) based on Class A pan evaporation (ECA) is very usual in irrigated areas. For this purpose the ECA values are multiplied by a pan coefficient (Kp) to obtain ETo. Kp values can be estimated in different ways being, however, important to know which method would estimate the best value for a given locality. In the present work estimated values of ETo based on Class A pan evaporation, using Kp values determined by different methods, were compared to Penman-Monteith-FAO (EToPM) values for the northwest region of the São Paulo State, Brazil. The annual average Kp, determined dividing EToPM by ECA, was 0.74. For the rainy months (December to March) the average Kp value was 0.80 and for the dry months (April to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Penman-Monteith; Pan coefficient; Irrigation. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300001 |
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| Conceição,Marco Antônio Fonseca; Coelho,Rubens Duarte. |
| Wind incidence can affect microsprinkler water distribution. Evaluations of those conditions can be facilitated using simulations by computational models. The present work evaluates the performance of a ballistic model on simulating the wind effect on microsprinkler water distribution. Experimental tests were carried out using self-compensating microsprinklers, nozzle sizes 1.00 mm (gray), 1.10 mm (brown), 1.48 mm (orange), and 1.75 mm (yellow). The gray and brown nozzles used black swivels and the orange and yellow nozzles used blue swivels. The wind effect was artificially caused by fourteen 200 W fans. Computational simulations were realized using SIRIAS software, based on a ballistic model originally developed for sprinkler systems. The correlation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation; Software. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200001 |
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| Conceição,Marco Antônio Fonseca; Tonietto,Jorge; Fialho,Flávio Bello. |
| O Sistema de Classificação Climática Multicritérios Geovitícola (CCM), empregado na caracterização climática de regiões produtoras de uvas, é composto pelos índices Heliotérmico (IH), de Frio Noturno (IF) e de Seca (IS) sendo que este se baseia no balanço hídrico potencial do solo. Para se calcular os valores de IS, são necessários dados da precipitação pluvial e da evapotranspiração potencial (ETP), estimados pelo método-padrão de Penman-Monteith. Nem todas as regiões vitícolas, no entanto, apresentam as variáveis meteorológicas necessárias para o uso desse método. Daí a importância de métodos que permitem estimar a ETP com base apenas em dados da temperatura do ar, como o de Hargreaves. No presente trabalho, foram comparados os Índices de Seca calculados... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Viticultura; Videira; Zoneamento climático. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452012000100024 |
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