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| Registros recuperados: 87 | |
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| Ferreira, Lucas Borges; Duarte, Anunciene Barbosa; Cunha, Fernando França da; Fernandes Filho, Elpídio Inácio. |
| Estimation of reference evapotranspiration (ETo) is very relevant for water resource management. The Penman-Monteith (PM) equation was proposed by the Food and Agriculture Organization (FAO) as the standard method for estimation of ETo. However, this method requires various weather data, such as air temperature, wind speed, solar radiation and relative humidity, which are often unavailable. Thus, the objective of this study was to compare the performance of multivariate adaptive regression splines (MARS) and alternative equations, in their original and calibrated forms, to estimate daily ETo with limited weather data. Daily data from 2002 to 2016 from 8 Brazilian weather stations were used. ETo was estimated using empirical equations, PM equation with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Data driven; Irrigation scheduling; Agrometeorology; Artificial intelligence.; Agrometeorologia. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39880 |
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| Ferreira, Lucas Borges; Duarte, Anunciene Barbosa; Cunha, Fernando França da; Fernandes Filho, Elpídio Inácio. |
| Estimation of reference evapotranspiration (ETo) is very relevant for water resource management. The Penman-Monteith (PM) equation was proposed by the Food and Agriculture Organization (FAO) as the standard method for estimation of ETo. However, this method requires various weather data, such as air temperature, wind speed, solar radiation and relative humidity, which are often unavailable. Thus, the objective of this study was to compare the performance of multivariate adaptive regression splines (MARS) and alternative equations, in their original and calibrated forms, to estimate daily ETo with limited weather data. Daily data from 2002 to 2016 from 8 Brazilian weather stations were used. ETo was estimated using empirical equations, PM equation with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.05.00-0 data driven; Irrigation scheduling; Agrometeorology; Artificial intelligence. Agrometeorologia. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39880 |
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| Domingues, Rafael; Pereira, André Belmont; Pires, Luiz Fernando; Schiebelbein, Luis Miguel; Barbosa, Eduardo Augusto Agnellos; Auler, André Carlos. |
| Beans crop is an agricultural staple largely consumed in Brazil because it is part of the basic food of the population. Such a crop is usually grown by small growers and turns out to be of a great social and economical importance. The aim of the current manuscript was to scrutinize the effect of soil water status on its physical attributes, such as bulk density, total porosity, macroporosity, microporosity, hydraulic conductivity under protected environment conditions on beans crop (Phaseolus vulgaris L.). The effect of the soil physical attributes on the biological response of the plants was also investigated. The experiment was installed in March of 2016 in a greenhouse. The experimental design was completely randomized in a factorial scheme with four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomy; Agrometeorology; Soil Physics; Irrigation Science Phaseolus vulgaris L; Hydraulic conductivity; Soil moisture; Macroporosity; Microporosity; Bulk density. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4585 |
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| Aparecido,Lucas Eduardo de Oliveira; Rolim,Glauco de Souza; Moraes,José Reinaldo da Silva Cabral de; Rocha,Hélio Gallo; Lense,Guilherme Henrique Expedito; Souza,Paulo Sergio. |
| ABSTRACT Hardier crops are needed in the arid regions of the Brazilian state of Minas Gerais, and annatto (Bixa orellana L.) is a good candidate. Producers, however, do not know if their areas are suitable for its cultivation and so are not investing in its implementation. Agroclimatic zoning would provide guidance to the producers. Identifying potential areas for the production of this crop would thus contribute to the agroclimatic zoning of B. orellana in Minas Gerais. We collected data for air temperature and precipitation from 852 meteorological stations in the state to classify regions as suitable, marginally suitable, or unsuitable for the crop. Suitable regions had an air temperature between 22 and 27 °C and precipitation between 800 and 1600... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Climatic risk; Climatic modeling; Agrometeorology; Bixa orellana L.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100193 |
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| Ferreira,Lucas Borges; Cunha,Fernando França da; Duarte,Anunciene Barbosa; Sediyama,Gilberto Chohaku; Cecon,Paulo Roberto. |
| ABSTRACT The estimation of the reference evapotranspiration is an important factor for hydrological studies, design and management of irrigation systems, among others. The Penman Monteith equation presents high precision and accuracy in the estimation of this variable. However, its use becomes limited due to the large number of required meteorological data. In this context, the Hargreaves-Samani equation could be used as alternative, although, for a better performance a local calibration is required. Thus, the aim was to compare the calibration process of the Hargreaves-Samani equation by linear regression, by adjustment of the coefficients (A and B) and exponent (C) of the equation and by combinations of the two previous alternatives. Daily data from 6... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evapotranspiration; Irrigation; Temperature; Agrometeorology. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000100104 |
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| Cunha,Fernando F. da; Magalhães,Fernando F.; Castro,Marco A. de; Souza,Epitácio J. de. |
| ABSTRACT Before choosing the method of the estimate of reference evapotranspiraton (ET0) in a region, it is important to evaluate the degree of precision of the model. The present research aimed to evaluate the performance of 30 methods for daily ET0 estimate in the Cassilândia city, Brazil. The meteorological data had been obtained from the National Institute of Meteorology in the period of four years (from April, 2008 to March, 2012). As standard method it was chosen the Penman-Monteith-FAO56, and the comparison of the results was by means of the estimated standard error (ESE), the determination coefficient (R2), the coefficients “a” and “b” of the linear regressions, Willmott's index of agreement (d), Pearson's correlation coefficient (r) and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrometeorology; ET0; Evaporation; Irrigation; Penman-Monteith-FAO 56 method. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100173 |
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| Sarmiento,Christiany M.; Coltri,Priscila P.; Alves,Marcelo de C.; Carvalho,Luiz G. de. |
| ABSTRACT This study used spectral data integrated with the agrometeorological model by Doorenbos and Kassam to estimate soybean grain productivity in the state of Mato Grosso, Brazil. In the developed model, spectral data were used instead of meteorological data and biophysical parameters of the crop. For this purpose, the products of real and potential evapotranspiration (MOD16), normalized difference vegetation index – NDVI (MOD13Q1), and leaf area index (MOD15A2H) from the MODIS satellite were used, in addition to sunstroke data obtained by using the visible channel from the satellite GOES IMAGER. The results obtained showed that, with the proposed methodology, it was possible to follow the development of soybean cultivation throughout the cycle and to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geographic Information System; Mathematical Modeling; Remote Sensing; Agrometeorology; Crop Monitoring. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300405 |
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| FIETZ, C. R.; COMUNELLO, E.; FLUMIGNAN, D. L.. |
| A temperatura média em junho em Dourados foi de 18,2 °C (Tabela 1), quase um grau inferior à média histórica deste mês, que é de 19,1 °C. Em oito dias do mês as temperaturas foram inferiores a 10 °C, com mínima de 3,4 °C, em 12 de junho, a mais baixa registrada no primeiro semestre de 2022. Atemperatura máxima do mês foi 30,9 °C, em 21 de junho, o único dia do mês com temperatura superior a 30 ºC. |
| Tipo: Folhetos |
Palavras-chave: Agrometeorologia; Mato Grosso do Sul; Agricultura; Meteorologia; Agrometeorology; Meteorology. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1144616 |
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| FIETZ, C. R.; FLUMIGNAN, D. L.; COMUNELLO, E.. |
| Tabela 1. Temperaturas e chuvas registradas em março de 2021, em Dourados, Rio Brilhante e Ivinhema.(1)-1Superior a 1 mm dia.Fonte: Guia Clima (2021).Temperatura média (°C)Temperatura mínima (°C)Data damínimaTemperatura máxima (°C)Data damáximaChuva (mm)Dias chuvosos(1)EstaçãoDouradosRio BrilhanteIvinhema25,816,431/3/202131/3/202131/3/202135,613/3/202139727,317,838,226/3/2021951026,216,535,613/3/20211367Após o janeiro mais chuvoso já registrado na estação meteorológica da Embrapa Agropecuária Oeste, assim como ocorreu em fevereiro, em março de 2021 as chuvas foram escassas em Dourados. Choveu apenas 39 mm (Tabela 1), 30% da média histórica deste mês, que é de 137 mm. Houve 7 dias chuvosos e a maior chuva foi de 14 mm, no dia 17. Nos 42 anos de... |
| Tipo: Folhetos |
Palavras-chave: Agrometeorologia; Mato Grosso do Sul; Agricultura; Meteorologia; Agrometeorology; Meteorology. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1134274 |
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| FIETZ, C. R.; COMUNELLO, E.; FLUMIGNAN, D. L.. |
| Fevereiro teve temperaturas recordes. Em 2022, foi registrado o mês de fevereiro mais quente dos últimos 22 anos. A temperatura média em Dourados foi de 27,5 °C (Tabela 1), mais de 2 graus Celsius acima da média histórica desse mês, que é de 25,2 °C. Em 26 dias do mês as temperaturas superaram os 30 °C. No dia 15, a máxima atingiu 38,1 °C, a temperatura mais alta registrada em fevereiro nos últimos 18 anos. Atemperatura mínima foi de 13,9 °C, no dia 8. Em Rio Brilhante, as temperaturas também foram elevadas. A temperatura média foi de 27,3 °C, 1 grau Celsius superior à média de 9 anos da estação meteorológica da Embrapa Agropecuária Oeste, que é de 26,3 °C. Fevereiro de 2022 foi o mais quente em Rio Brilhante desde 2014. Em 26 dias do mês a temperatura... |
| Tipo: Folhetos |
Palavras-chave: Agrometeorologia; Mato Grosso do Sul; Agricultura; Meteorologia; Meteorology; Agrometeorology. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1149316 |
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| Registros recuperados: 87 | |
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