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| Registros recuperados: 648 | |
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| Biro, Szabolcs; Kapronczai, Istvan; Szekely, Erika; Szucs, Istvan. |
| A Nemzeti Vidékstratégiai Koncepció (Vidékfejlesztési Minisztérium, 2011) vitaanyagának előszava a természeti erőforrások felértékelődésére, a természeti környezet védelmére, valamint a mezőgazdaság és a vidék szoros kapcsolatára hívja fel a figyelmet. Ennek tükrében élelmiszerelőállítás csak a talajok, az ivóvízbázisok és a táj fenntartását eredményező, a jó környezeti állapotot és az élővilág sokszínűségét megőrző, valamint a vidéki életformát, a helyi közösségeket és kultúrát megóvó jó minőségű és biztonságos alapanyagokra épülő termelés mellett értelmezhető. Jelen vitacikk a mezőgazdasági vízhasználat vidékstratégiai vonatkozásait kívánja feltárni, felhasználva kutatási eredményeinket1 és figyelembe véve vizsgálataink alapján megfogalmazott... |
| Tipo: Article |
Palavras-chave: Természeti erőforrások; Föld; Öntözés; Klíma; Role of natural resources; Land; Climate change; Irrigation; Agricultural and Food Policy; Environmental Economics and Policy; Production Economics. |
| Ano: 2011 |
URL: http://purl.umn.edu/119906 |
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| EMBRAPA. Centro de Pesquisa Agropecuaria do Tropico Semi-Arido.. |
| Este documento apresenta, em duas partes, os resultados da pesquisa nos anos de 1976-1977 e a programação para o período de 1978-1979. Projetos das áreas irrigadas, no Projeto de Irrigação São Gonçalo, PB (DNOCS); Nos Projetos Mandacarú, BA; Bebedouro, PE, ambos da CODEVASF, e na estação Experimental de Jatinã, em PE, representando as áreas de aluvião. |
| Tipo: Outras publicações técnicas (INFOTECA-E) |
Palavras-chave: Projeto de Irrigacao; Regiao Semi-Arida; Água; Agricultura; Irrigação; Solo; Manejo; Pesquisa; Agriculture; Irrigation; Research; Soil; Water. |
| Ano: 1978 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/138386 |
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| Santos,Gilmar O.; Hernandez,Fernando B. T.; Ferraudo,Antonio S.; Vanzela,Luiz S.; Santos,Duílio J. O.. |
| ABSTRACT Without effective actions to improve environmental management, water resources tend to become scarce. Thus, this study aimed to understand the processes influencing the physical, chemical, and biological properties of the water due to land uses and occupation in the Ipê stream basin, in Ilha Solteira - SP (Brazil), regarding the dependence of the analyzed variables. Monitoring of chemical, physical, and biological water quality was performed from 2006 to 2011, and the records of land use and occupation in 2011. A factorial multivariate analysis allowed us to understand that the processes in densely populated areas increased degradation of water by the input of organic loads, yet those of farming areas enhanced the degradation of the chemical and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Factor analysis; Irrigation; Land use and occupation; River basin. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300453 |
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| Tagliaferre,Cristiano; Guimarães,Diogo U. G.; Gonçalves,Lorena J.; Amorim,Carlos H. F.; Campos,Willian V.; Rocha,Felizardo A.. |
| ABSTRACT Salinity is one of the main environmental problems that negatively affect plant growth and metabolism, besides being one of the factors responsible for the decrease in the yield of crops, especially in arid and semiarid regions. Thus, the aim of this study was to evaluate the effects of soil salinity on the mineral nutrition of irrigated cowpea. The experiment was conducted in drainage lysimeters in a greenhouse, in a completely randomized design with seven treatments, one irrigated with freshwater (control) and six irrigated with saline water with different leaching fractions (5, 10, 15, 20, 30 and 40%) of the applied irrigation depth, with three replicates. The irrigation with saline water treatments did not affect significantly the contents of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salinity; Leaching depths; Irrigation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001201067 |
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| Lima,Yuri Bezerra de; Sá,Francisco Vanies da Silva; Ferreira Neto,Miguel; Paiva,Emanoela Pereira de; Gheyi,Hans Raj. |
| ABSTRACT Cowpea is widely grown in the Brazilian semiarid region, however, due to excess salts in the soil and irrigation water constantly low crop productivity has been observed. Accumulation of salts in the soil, growth and biomass partition of cowpea under salt stress and phosphorus fertilization was evaluated in this study. The assay was conducted in a greenhouse in Mossoró, State of Rio Grande do Norte, Brazil, from September to December 2015, using a Alfissol Latosolic with low phosphorus content. The experiment was carried out in a randomized block design in a factorial 5 x 3 arrangement, consisting of five water salinity levels (0.5, 1.5, 2.5, 3.5 and 4.5 dS m-1) and three doses of superphosphate (60, 100 and 140% of the recommended dose for crop -... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata; Soil fertility; Irrigation; Growth analysis; Saturation extract. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000500765 |
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| MAGALHÃES, P. S. de S.. |
| São abordados alguns aspectos da adução e bombeamento da água para fins de irrigação. Os topicos principais: Adução: aducão por gravidade, por recalque, adutoras mixtas e peças especiais das adutoras. Bombas hidráulicas: classificação, bombas estaticas, alternativas e rotativas, Ariete hidráulico; bombas dinâmicas, curvas características, altura manométrica, perdas e rendimentos, principais tipos de bombas dinâmicas, cavitação nas bombas hidráulicas de fluxo, NPSH-Net Positive Suction head, Currea característica do sistema, bombas em paralelo, bombas em série, seleção de bombas e concepção de sistemas de recalque, instalação de conjuntos de bombeamento, procedimentos para partida e parada, bombas dinâmicas espéciais, bomba e ar comprimido e bomba injetora. |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Condução; Bombeamento; Adução; Adduction; Hydraulic; Água; Hidráulica; Irrigação; Irrigation; Water. |
| Ano: 1983 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132501 |
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| Registros recuperados: 648 | |
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