Center Pivot Irrigation
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Water distribution model for center pivot end gun sprinklers
RESUMO Canhões finais podem aumentar a área irrigada por sistemas de irrigação tipo pivô central sem um investimento substancial. Este estudo foi desenvolvido na Universidade Federal de Lavras, MG, Brasil, e objetivou descrever e validar um modelo de distribuição de água de canhão hidráulico em extremidade final de pivô central. O canhão hidrául
Rev. bras. eng. agríc. ambient.. Publicado em: 10/07/2019
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2. THE TOPPLING OF AN IRRIGATION CENTER PIVOT SUBMITTED TO WIND ACTION EFFECTS
ABSTRACT This research aims to improve the study about the stability of truss structures used in pivot irrigation, widely used due to the growing demand for food production, when submitted to wind effects. Specifically, it aims to verify the maximum wind speed supported by an irrigation center pivot structure when submitted to the load effects caused by wind
Eng. Agríc.. Publicado em: 25/04/2019
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3. ENERGY EFFICIENCY OF A CENTER PIVOT IRRIGATION SYSTEM
ABSTRACT This study aimed to evaluate the energy efficiency of a center pivot irrigation system operating in a terrain of variable topography. Values of Pumping Energy Efficiency (PEE), Supply Energy Efficiency (SEE), Global Energy Efficiency (GEE) and Specific Energy (Es in kWh m-3) computed at 18 different angular positions of the lateral line were used as
Eng. Agríc.. Publicado em: 2018-04
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4. METHODOLOGY FOR DIMENSIONING OF A CENTER PIVOT IRRIGATION SYSTEM OPERATING WITH DRIPPER TYPE EMITTER
ABSTRACT: In Brazil, the conventional center pivot is widely used for irrigation of agricultural crops and its use has grown continuously. However, when improperly managed, it facilitates the development of diseases in all parts of the plant, with a direct effect on productivity, besides favoring losses of water by evaporation. The drip may be an alternative
Eng. Agríc.. Publicado em: 2017-08
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5. DIFFERENT SOYBEAN PLANT POPULATIONS UNDER CENTRAL PIVOT IRRIGATION
ABSTRACT Planting density can influence the competitiveness among plants mainly by water, nutrients and solar radiation, directly affecting yield. The purpose of this study was to evaluate the productivity of different soybean cultivars at different planting populations under irrigated and rainfed conditions. The experiment was conducted during the 2014/15 g
Eng. Agríc.. Publicado em: 2017-06
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6. SURFACE ENERGY BALANCE SYSTEM (SEBS) AND SATELLITE DATA FOR MONITORING WATER CONSUMPTION OF IRRIGATED SUGARCANE
ABSTRACT The objective of this research was to evaluate the water consumption of irrigated sugarcane areas using the Surface Energy Balance System (SEBS) driven by products derived from Meteosat Second Generation (MSG), SPOT/VEGETATION, Terra/MODIS satellite data and meteorological observations data from Minas Gerais State, Brazil. The actual evapotranspirat
Eng. Agríc.. Publicado em: 2016-12
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7. Monitoring of Pesticide Residues in Surface and Subsurface Waters, Sediments, and Fish in Center-Pivot Irrigation Areas
In this study, the monitoring of pesticide residues, which show potential for environmental contamination, in center-pivot irrigated areas in the Brazilian cerrado, was performed. The pesticides monitored were acephate, atrazine, azoxystrobin, buprofezin, carbofuran, cyproconazole, chlorpyrifos, difenoconazole, diuron, imidacloprid, malathion, methamidophos,
J. Braz. Chem. Soc.. Publicado em: 2015-11
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8. Avaliação econômica da terminação de bovinos em pastagem irrigada / Economic evaluation of finishing of cattle in irrigated pasture
The adoption of new technologies with the aim of intensifying the production of beef cattle has increased in recent years. Irrigation of pasture is one of these alternatives on the rise and this study aimed to determine the economic viability of finishing cattle by measuring the production costs and financial indicators. This study evaluated three production
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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9. Procedimento para estimativa da intensidade de precipitação máxima admissível em pivô-central com base nas características do equipamento e do solo.
ABSTRACT: A procedure to estimate the center pivot maximum application rate, based on equipment and soil characteristic is presented. It was developed to minimize the surface runoff. To achieve this objective, the Green and Ampt (GA) infiltration equation was modified to include surface sealing and surface storage. The highest application rate is determined
Planaltina. Publicado em: 2011
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10. Método do tanque Classe A para irrigação da soja, cultivar Sambaíba, no Cerrado.
ABSTRACT: Efficient use of water resources is the key to guarantee suply for future human consumption and irrigation. In the irrigated areas of the Cerrado region pressurized irrigation systems allow high efficiency in water conduction. However, lack of knowledge in crop water requirement determine inadequated crop water management. Negative effect on crop d
Planaltina. Publicado em: 2011
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11. Método do tanque Classe A para irrigação da cevada, cultivar BRS 195, no cerrado.
ABSTRACT: Efficient use of water resources is the key to guarantee water suply for future human consumption and irrigation. in the irrigated areas of the Cerrado region pressurized irrigation systems allow high efficiency in water conduction. However, lack of knowledge in crop water requirement determine inadequated crop water management. Negative effect on
Planaltina. Publicado em: 2011
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12. Coeficientes de drenagem superficial devido a chuvas de irrigação por pivô central no perímetro irrigado Bebedouro II (Semente Básica).
Na area de producao de Semente Basica da EMBRAPA, em Petrolina, PE, constataram-se problemas de drenagem superficial (alagamento), provocados por excessos de agua de chuva e de irrigacao. Considerando-se ausencia de informacoes das vazoes de escoamento superficial das chuvas na regiao e a necessidade desses dados para o dimensionamento de um sistema de drena
Petrolina: EMBRAPA-CPATSA. Publicado em: 2011