Avaliacao Do Sistema De Irrigacao Por Aspersao Atraves Do Modelo Linear

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Avaliacao do sistema de irrigacao por aspersao atraves do modelo linear

Author : J.M. Ribeiro
Publisher :
ISBN 13 :
Total Pages : 89 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Avaliacao do sistema de irrigacao por aspersao atraves do modelo linear by : J.M. Ribeiro

Download or read book Avaliacao do sistema de irrigacao por aspersao atraves do modelo linear written by J.M. Ribeiro and published by . This book was released on 1982 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Os testes de campo foram realizados em um periodo de 7 meses (agosto de 1981 a marco de 1982), na Estacao Experimental Vale do Curu, Pentecoste, Ce. O modelo sugerido por KARMELI et alli (1978), foi usado no estudo dos padroes de precipitacao dos aspersores, no que se refere a eficiencia, uniformidade de distribuicao, percolacao profunda e outros parametros da irrigacao. O modelo e baseado na curva de frequencia acumulada adimensional da lamina de infiltracao (Y) e na fracao da area (X), a qual e representada pela funcao da regressao linear: Y = a + bX, onde Y= lamina adimensional da precipitacao; X= fracao da area; a e b= coeficiente da equacao linear (constantes). Para simular o padrao de distribuicao da irrigacao por aspersao, para 21 espacamentos diferentes entre aspersores (12 x 12m a 42 x 42m), foi usado um programa de computador proposto por KARMELI et alli (1978). ...

Determinacao dos parametros de avaliacao de dois sistemas de irrigacao por aspersao

Author : L.C. Nogueira
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (71 download)

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Book Synopsis Determinacao dos parametros de avaliacao de dois sistemas de irrigacao por aspersao by : L.C. Nogueira

Download or read book Determinacao dos parametros de avaliacao de dois sistemas de irrigacao por aspersao written by L.C. Nogueira and published by . This book was released on 1987 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dois sistemas de irrigacao por aspersao convencional foram instalados, em 1985, na Fazenda Experimental do Vale do Curu (Pentecoste-CE, Brasil), em areas de 1 ha cada, com o objetivo de estudar sua performance tecnica. Um dos sistemas constou de dois ramais moveis em "Z" e o outro, de um ramal movel em "L". O sistema de dois ramais operou com aspersores ZE-30, a uma pressao de servico de 3,2 atm e taxa de aplicacao de 4,26 mm/h, no espacamento de 18 x 18 m. Por sua vez, o sistema de um ramal movel funcionou com aspersores ZED-30, a uma pressao de 2,4 atm e taxa de aplicacao de 7,86 mm/h, no mesmo espacamento. A partir dos dados obtidos nos 12 testes de campo realizados, procedeu-se a determinacao dos parametros de qualidade da irrigacao (Ea = Eficiencia de aplicacao, Es = Eficiencia de armazenamento e Dp = Perdas por percolacao) atraves da aplicacao dos modelos Linear e Normal, assim como, a obtencao dos Coeficientes de Uniformidade, pela aplicacao das equacoes propostas por CHRISTIANSEN (CUC) e por HART (CUH). ...

Analise da performance de um sistema de irrigacao por aspersao convencional, acima e abaixo da superfucie do solo

Author : A. B. Penaforte
Publisher :
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Analise da performance de um sistema de irrigacao por aspersao convencional, acima e abaixo da superfucie do solo by : A. B. Penaforte

Download or read book Analise da performance de um sistema de irrigacao por aspersao convencional, acima e abaixo da superfucie do solo written by A. B. Penaforte and published by . This book was released on 1992 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: O experimento foi conduzido no campo experimental da Escola Superior de Agricultura de Lavras, na area do Departamento de Biologia, no municipio de lavras, MG, com o objetivo de analisar a performance de um sistema de irrigacao por aspersao, acima e abaixo da superficie do solo atraves da uniformidade e eficiencia de apliacao de agua. Foram realizadas nove irrigacoes com oito aspersores, quatro por linha, espacados de 12 m entre si, nos quais mediu-se a vazao, pressao e velocidade de rotacao. As precipitacoes foram medidas atraves de 16 pluviometrso, espacados de 3m entre si, na area compreendida entre os quatro aspersores centrais. As distribuicoes de agua abaixo da superficie foram medidas atraves da umidade determinada em amostras de solo, retiradas em pontos demarcados pelos pluviometros, nas camadas de 0-20 cm e 20-40 cm abaixo da superficie do solo, antes e apos as irrigacoes. As uniformidades das distribuicoes obtidas acima e abaixo da superficie, foram expressao pelos coeficientes de uniformidade, proposta por Christiansen, Wilcox e Swailes, Criddle et alli e Hart. Para determinacao dos parametros de eficiencia de irrigacao, foram utilizadas as laminas coletadas nos pluviometros e tambem as laminas armazenadas no solo. Para fins de comparacao, foram determinados os parametros de desempenho atraves dos modelos uniforme e normal. Os valores dos coeficientes de uniformidades estimados na superficie, foram inferiores aqueles estimados abaixo da superficie do solo. Os modelos linear e normal nao apresentaram diferencas significativas na determinacao dos parametros de desempenho. De acordo com a eficiencia de aplicacao media (Ea=85,08%), eficiencia de armazenamento media (Es=86,94%), perda por percolacao profunda media (Pq=14,92%) e a uniformidade de distribuicao media (Ud=90,64%), a irrigacao praticada pode ser considerada excelente [categoria I de HART at alii (1979)], nao sendo necessaria nenhuma melhoria. Nas conducoes experimentais, a cultura teve uma produtividade de 1775,7 kg/ha.

Avaliação de sistema de irrigação por aspersão

Author : J. M. Pinto
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (71 download)

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Book Synopsis Avaliação de sistema de irrigação por aspersão by : J. M. Pinto

Download or read book Avaliação de sistema de irrigação por aspersão written by J. M. Pinto and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Manejo e avaliação do sistema de irrigação por aspersão

Author : J. M. Soares
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Manejo e avaliação do sistema de irrigação por aspersão by : J. M. Soares

Download or read book Manejo e avaliação do sistema de irrigação por aspersão written by J. M. Soares and published by . This book was released on 1982 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Analise de uniformidade da distribuicao da agua no sistema de irrigacao por aspersao em linha

Author : N. T.de ARRUDA
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Analise de uniformidade da distribuicao da agua no sistema de irrigacao por aspersao em linha by : N. T.de ARRUDA

Download or read book Analise de uniformidade da distribuicao da agua no sistema de irrigacao por aspersao em linha written by N. T.de ARRUDA and published by . This book was released on 1981 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: O presente trabalho foi conduzido numa area plana, localizada proximo do laboratorio de Hidraulica do Departamento de Engenharia Agricola, da Universidade Federal de Vicosa, Estado de Minas Gerais, no periodo de 28 de agosto a 10 de outubro de 1980. Foram utilizadas duas marcas de aspersores, entre as existentes no mercado, pelo fato de serem as mais comumente encontradas na regiao do estudo: - Aspersor marca PERROT fabricado pela ASBRASIL - ASPERSAO NO BRASIL S.A. (3), modelo ZED-30, com angulo de inclinacao do jato de 27 graus e os diametros dos locais de 6,0 x 7,5 mm. - Aspersor marca TOP fabricado pela EDERER & CIA. LTDA.(12), modelo TOP-A, com angulo de inclinacao de 27 graus e diametros dos locais de 6,0 x 7,0 mm. Ambos os aspersores foram instaladossobre tubos de elevacao com 1,5 a 2,0 m de comprimento e 25,4 mm (1 pol) de diametro. A pressao de servico variou de 2,5 a 4,0 bares para o aspersor Asbrasil e 3,0 a 4,0 bares para o aspersor Ederer. Estas faixas de pressao sao recomendadas pelos catalogos dos fabricantes, exceto a pressao de 3,0 bares para o aspersor EDERER. A velocidade media do vento durante todo experimento variou de 0,03 a 3,0 m/s. Desenvolveu-se um progama de computador, escrito me linhagem FORTRAN, para calcular a uniformidade de distribuicao da agua na irrigacao por aspersao em linha, atraves das seguintes expressoes: coeficientes de uniformidade de Christiansen, coeficiente estatistico de uniformidade e o coeficiente de variacao. Os calculos basearam-se no modelo de distribuicao (...).

Avaliação de desempenho de sistema de irrigação

Author : Valsergio Barros da Silva
Publisher :
ISBN 13 : 9783330997301
Total Pages : 60 pages
Book Rating : 4.9/5 (973 download)

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Book Synopsis Avaliação de desempenho de sistema de irrigação by : Valsergio Barros da Silva

Download or read book Avaliação de desempenho de sistema de irrigação written by Valsergio Barros da Silva and published by . This book was released on 2017-06-13 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Revista Ceres

Author :
Publisher :
ISBN 13 :
Total Pages : 588 pages
Book Rating : 4.A/5 ( download)

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Book Synopsis Revista Ceres by :

Download or read book Revista Ceres written by and published by . This book was released on 1991 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fertilizing for High Yield and Quality

Author : Lindbergue Araújo Crisóstomo
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (891 download)

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Book Synopsis Fertilizing for High Yield and Quality by : Lindbergue Araújo Crisóstomo

Download or read book Fertilizing for High Yield and Quality written by Lindbergue Araújo Crisóstomo and published by . This book was released on 2007 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acerola; Banana; Cashew: dwarf variety; Citrus; Coconut: green dwarf variety; Guava; Mango; Papaya; Passion-fruit; Pineapple; Soursop.

Fitopatologia brasileira

Author :
Publisher :
ISBN 13 :
Total Pages : 996 pages
Book Rating : 4.E/5 ( download)

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Download or read book Fitopatologia brasileira written by and published by . This book was released on 1998 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Landforms and Landscapes of Portugal

Author : Gonçalo Vieira
Publisher : Springer
ISBN 13 : 9783319036427
Total Pages : 400 pages
Book Rating : 4.0/5 (364 download)

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Book Synopsis Landforms and Landscapes of Portugal by : Gonçalo Vieira

Download or read book Landforms and Landscapes of Portugal written by Gonçalo Vieira and published by Springer. This book was released on 2016-01-08 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book brings together contributions from over 35 Portuguese geomorphologists, presenting a thorough overview of the main highlights of the landscape of Portugal's mainland, Azores and Madeira. The book, which is a tribute to Professor António de Brum Ferreira, first President of the Portuguese Association of Geomorphologists and former Professor at the University of Lisbon, who passed away in January 2013, is organized in 3 parts: a) Introduction, which presents a general framework of the physical geography of Portugal, b) Geomorphological landscapes, presenting ca. 30 short papers with regional focus on key geomorphological areas, c) Applied geomorphology, providing an updated vision on the protection of geomorphological heritage with a focus on geoparks, as well as on Geomorphological hazards in Portugal. This first book ever to concentrate on the geomorphology of Portugal will surely become a benchmark for Portuguese geomorphology.

Horticultura brasileira

Author :
Publisher :
ISBN 13 :
Total Pages : 1080 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Horticultura brasileira by :

Download or read book Horticultura brasileira written by and published by . This book was released on 2005 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mechanized Sprinkler Irrigation

Author : Lionel Rolland
Publisher : Food & Agriculture Org.
ISBN 13 : 9789251009970
Total Pages : 444 pages
Book Rating : 4.0/5 (99 download)

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Book Synopsis Mechanized Sprinkler Irrigation by : Lionel Rolland

Download or read book Mechanized Sprinkler Irrigation written by Lionel Rolland and published by Food & Agriculture Org.. This book was released on 1982 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction; description and operation of non-mechanized sprinkler irrigation systems; reasons for mechanizing and automating sprinkler irrigation; ways and means used to facilitate the operation of sprinkler systems;irrigation with a boom-sprinkler; towed laterals; irrigation system using towed gun-sprinklers to change the set;wheel-mounted sprinkler laterals with a pipe-driven frontal movement; whel-mounted sprinkler laterals driven with a shaft independent of the pipe; irrigation machines carrying sprinkler lines and self-moved during one set of watering; irrigation machines automatically moving the watering unit from one set to the next; irrigation machines moving automatically while irrigating continuous strips of land; centre pivot irrigation; sprinklerlaterals with continuous frontal movement during watering;fixed irrigation systems; comparing sprinkler irrigation systems; conclusions.

Management of Farm Irrigation Systems

Author : G.J. Hoffman
Publisher :
ISBN 13 :
Total Pages : 1040 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Management of Farm Irrigation Systems by : G.J. Hoffman

Download or read book Management of Farm Irrigation Systems written by G.J. Hoffman and published by . This book was released on 1992 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant-soil-water relationships; evapotranspiration models; crop growth models; crop yield response; irrigation efficiency and uniformity;need; irrigations system controls measuring irrigation water; water delivery control; optinal conjunctive use of irrigation souces;economies of irrigation water; water delivery control;optinal conjunctive use of irrigation souces; economies of irrigation management; irrigation for arid areas;irrigation for tropical areas; deficit irrigation; salinnity ,management; energy management; hemigation; modifying the aerial environment; soil management.

Nanocosmetics and Nanomedicines

Author : Ruy Beck
Publisher : Springer Science & Business Media
ISBN 13 : 3642197922
Total Pages : 368 pages
Book Rating : 4.6/5 (421 download)

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Book Synopsis Nanocosmetics and Nanomedicines by : Ruy Beck

Download or read book Nanocosmetics and Nanomedicines written by Ruy Beck and published by Springer Science & Business Media. This book was released on 2011-04-06 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book "Nanocosmetics and nanomedicines: new approaches for skin care” contains a summary of the most important nanocarriers for skin delivery. Although “nanocosmetics” is a subject widely commented in the academy and the beauty industry, a book covering the skin care treatments using nanotechnological approaches with cosmetics and nanomedicines is still missing, therefore the need for this publication. This book is divided in three parts: The first one (Part A) is devoted to a brief review on the main topics related to the skin delivery and to the introduction of the subject “nanocosmetics”. The second part (Part B) presents different types of nanocarriers applied as skin delivery systems for cosmetics or drugs. The last part (Part C) shows a wide range of applications of nanotechnology on the skin care area as well as on dermatocosmetic and dermatological fields.

Soil Salinity Assessment

Author : J. D. Rhoades
Publisher : Food & Agriculture Org.
ISBN 13 : 9789251042816
Total Pages : 172 pages
Book Rating : 4.0/5 (428 download)

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Book Synopsis Soil Salinity Assessment by : J. D. Rhoades

Download or read book Soil Salinity Assessment written by J. D. Rhoades and published by Food & Agriculture Org.. This book was released on 1999 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determination of soil salinity from aqueous electrical conductivity; determination of soil salinity from soil-paste and bulk soil electrical conductivity; example uses of salinity assessment technology; operational and equipment costs associated with salinity instrumentation measurement techniques.

A Frequency Dictionary of Portuguese

Author : Mark Davies
Publisher : Routledge
ISBN 13 : 113411091X
Total Pages : 950 pages
Book Rating : 4.1/5 (341 download)

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Book Synopsis A Frequency Dictionary of Portuguese by : Mark Davies

Download or read book A Frequency Dictionary of Portuguese written by Mark Davies and published by Routledge. This book was released on 2007-11-29 with total page 950 pages. Available in PDF, EPUB and Kindle. Book excerpt: An invaluable tool for learners of Portuguese, this Frequency Dictionary provides a list of the 5000 most commonly used words in the language. Based on a twenty-million-word collection of Portuguese (taken from both Portuguese and Brazilian sources), which includes both written and spoken material, this dictionary provides detailed information for each of the 5000 entries, including the English equivalent, a sample sentence, and an indication of register and dialect variation. Users can access the top 5000 words either through the main frequency listing or through an alphabetical index. Throughout the frequency listing there are also thrity thematically-organized ‘boxed’ lists of the top words from a variety of key topics such as sports, weather, clothing and relations. An engaging and highly useful resource, A Frequency Dictionary of Portuguese will enable students of all levels to get the most out of their study of Portuguese vocabulary. Former CD content is now available to access at www.routledge.com/9780415419970 as support material. Designed for use by corpus and computational linguists it provides the full text in a format that researchers can process and turn into suitable lists for their own research work.