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Registros recuperados: 27
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Aerobic rice - the China story International Rice Research Institute
Bouman, Bas.
Powerpoint presentation; 55 slides
Tipo: Presentation Palavras-chave: Aerobic rice; Water requirements; China; Simulation; Oryza 2000.
Ano: 2007 URL: http://hdl.handle.net/10269/37
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Agro-climatic suitability and water requirement for Tanzania guineagrass cultivation in the State of Ceará. Repositório Alice
LEMOS, N. L. S.; CAVALCANTE, A. C. R.; SILVA, T. G. F. da; PEZZOPANE, J. R. M.; SANTOS, P. M.; CÂNDIDO, M. J. D..
Abstracts: This study aimed to define areas suitable, and the irrigation water requirement for, cultivation of Tanzania guineagrass in the state of Ceará, Brazil. Tanzania guineagrass yield was estimated by a mathematical model, which considers the crop actual evapotranspiration, resulting from the crop climatological water balance. The water requirement throughout the year was estimated for soils with a water holding capacity of 20 (shallow soils), 40 (sandy soils), 60 (soils with medium texture) and 100 mm (clay soils). The relative frequency of occurrence of monthly productions greater than 2,750 kg DM ha-1 month-1 was obtained for different areas in Ceará, representative of most of the state's economic mesoregions. Tanzania guineagrass annual yields in...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Capacidade de armazenamento de água; Taxa de acúmulo; Capim Tanzânia; Brasil; Ceará; Panicum maximum; Modelo matemático; Gramínea forrageira; Matéria seca; Mathematical models; Simulation models; Water requirements; Water storage; Pastures; Brazil.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1070933
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Calibration of reference evapotranspiration models in Pará Agronomy
Farias, Vivian Dielly da Silva; Costa, Deborah Luciany Pires; Pinto, Joao Vitor de Novoa; Souza, Paulo Jorge Oliveira Ponte de; Souza, Everaldo Barreiro de; Ortega-Farias, Samuel.
The use of empirical agrometeorological models that can be adjusted to the climatic conditions of different regions has become increasingly necessary to improve water management in grain-producing municipalities. The aim of this work is to examine the correlation between various reference evapotranspiration (ETo) estimation methods and the standard FAO 56 Penman-Monteith method, as well as to determine correction factors, when necessary, for crop-producing municipalities in the northeast of Pará, during both the rainy and dry seasons. We compared simpler methods of ETo estimation to the FAO 56 Penman-Monteith method. For this purpose, meteorological data from Tracuateua, Bragança, Capitão Poço and Castanhal, provided by the National Institute of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Penman Monteith FAO 56; Climate monitoring; Water requirements.
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42475
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CROP COEFFICIENT REGIONALIZATION FOR IRRIGATED AGRICULTURE PLANNING IN MARANHÃO STATE -BRAZIL REA
Silva,Wilson A. Da; Santana,Jhonata S.; Silva,Cristiane M. Da; Nunes,Acassio A..
ABSTRACT: Irrigated agriculture has emerged as a necessary technology to achieve greater productivity, mainly by supplying the water requirements of agricultural crops in critical periods, especially for those regions where natural rainfall is insufficient to meet these requirements. The daily water consumption of crops is strongly influenced by local weather conditions, which justifies the need for regionalized studies of the parameters influencing the water depth to be applied. The crop coefficient (Kc) is perhaps the most important parameter because it interferes directly with the crop water requirements. This index must be determined for each region, thus avoiding the use of reference values meant for other climatic conditions, causing loss of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water requirements; Irrigation; Zea mays L..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500953
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Economics and politics of water resources development: Uda Walawe Irrigation Project, Sri Lanka AgEcon
Molle, Francois; Renwick, Mary E..
The Uda Walawe Irrigation and Resettlement Project (UWIRP) located in the Southern dry zone of Sri Lanka was initiated in the early 1950s. The original plan for the UWIRP was a highly ambitious social, economic and physical engineering project aimed at creating a modern, profitable agriculture sector. This report examines the history of water resources development and investment decisions for the UWIRP over a period of 50 years and uncovers underlying processes that shaped the evolution of the project and highlights the limitation of viewing development as a mere set of technical and social engineering endeavors.
Tipo: Report Palavras-chave: Water resources development; Irrigation programs; History; River basins; Rehabilitation; Costs; Crop production; Domestic water; Water use; Reservoirs; Fisheries; Decision making; Cost benefit analysis; Cost recovery; Water requirements; Water demand; Demand and Price Analysis; Environmental Economics and Policy; Farm Management.
Ano: 2005 URL: http://purl.umn.edu/44525
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Effect of nitrogen, spacing and water depth on the heritable plant characters associated with straw strength in rice International Rice Research Institute
Wu, Yu-long.
85 leaves. Thesis (M.S.) -- University of the Philippines
Tipo: Thesis Palavras-chave: Rice; Nitrogen; Spatial distribution; Water requirements; Lodging; Plant characteristics; Rice straw.
Ano: 1965 URL: http://hdl.handle.net/123456789/450
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Effects of irrigation methods on the yield, water requirement and nitrogen utilization of lowland rice International Rice Research Institute
Chang, Shueh-kun.
170 leaves : ill. (some col.). Thesis (M.S.) -- University of the Philippines
Tipo: Thesis Palavras-chave: Rice; Irrigation; Water requirements; Plant-water relations; Nitrogen content; Yields.
Ano: 1965 URL: http://hdl.handle.net/123456789/424
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Environmental and social values of river water: examples from the Menik Ganga, Sri Lanka. AgEcon
Dissanayake, Priyanka; Smakhtin, Vladimir U..
Many decisions on water allocation in river basins are made on economic grounds. Environmental and social benefits of water should also be considered in river basin management, and attempts should be made to value them similarly. This is not a straightforward task and very few studies have directly addressed this issue to date. In this paper, the Menik Ganga (River) in southern Sri Lanka is used as a case study to attempt and evaluate the costs and benefits of environmental water allocations, referred to as ‘environmental flows’ (EF). In this study, a broad definition of EF is used: the components of EF evaluated include the requirements of the religious festival, the requirements of the Yala National Park, the requirements of the Pilinnawa Coastal Wetland...
Tipo: Working or Discussion Paper Palavras-chave: Rivers; Ecosystems; Wetlands; Wildlife; Fisheries; Water allocation; Water requirements; Case studies; Economic evaluation; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/91876
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Environmental water needs and impacts of irrigated agriculture in river basins: A framework for a new research program AgEcon
Smakhtin, Vladimir U..
Tipo: Working or Discussion Paper Palavras-chave: Water resource management; Water conservation; Irrigated farming; River basins; Environmental effects; Ecosystems; Water requirements; Water allocation; Catchment areas; Lagoons; Wetlands; Environmental Economics and Policy; Farm Management; Resource /Energy Economics and Policy.
Ano: 2002 URL: http://purl.umn.edu/92695
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Estimating water requirements and water storage requirements for farms, community and backyard gardens, and for large irrigation systems: A user manual for PLANWAT Version 1.2.3b and a CD-ROM to install this program AgEcon
van Heerden, Pieter S..
Tipo: Working or Discussion Paper Palavras-chave: Computer models; Computer software; Irrigation requirements; Estimation; Irrigated farming; Irrigation management; Water harvesting; Water requirements; Water storage; Production Economics; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/92657
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Experimentation on suitability of water requirements for sweet corn, super sweet variety Thai Agricultural
Yongyot Supasak; Suwit Chourdumrongkul; Tanuchai Voralittanond; Sajee Charoenying.
Palavras-chave: Corn; Maize; Sweet corn; Water requirements; Irrigation; Yields; ข้าวโพด; ข้าวโพดหวาน; การใช้น้ำ; การให้น้ำ.
Ano: 1983 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4136
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Genomic approach for the improvement of water and nutrient use efficiency in rice International Rice Research Institute
Shou, Huixia.
Powerpoint Presentation; 53 slides
Tipo: Presentation Palavras-chave: Rice; Water requirements; Nutrient physiology; Genomics.
Ano: 2007 URL: http://hdl.handle.net/10269/64
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Increasing performance in water-limited environments - maintenance of growth under stress International Rice Research Institute
Cairns, Jill.
Powerpoint Presentation; 50 slides
Tipo: Presentation Palavras-chave: Rice; Drought resistance; Breeding; Water requirements; Variety trials; Plant Physiology.
Ano: 2006 URL: http://hdl.handle.net/10269/67
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Indicators for comparing performance of irrigated agricultural systems AgEcon
Molden, David J.; Sakthivadivel, Ramasamy; Perry, Christopher J.; de Fraiture, Charlotte; Kloezen, Wim H..
Outlines IWMI's external and other comparative performance indicators that allow for analysis of irrigation performance across systems. The purpose of these indicators is to understand the current situation with respect to productive utilization of land and water, to compare relative performance of systems, and to identify where performance can be improved.
Tipo: Report Palavras-chave: Irrigated farming; Irrigation systems; Indicators; Performance indexes; Financing; Crop production; Water demand; Water requirements; Prices; Agribusiness; Crop Production/Industries; Environmental Economics and Policy; Land Economics/Use.
Ano: 1998 URL: http://purl.umn.edu/44581
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Irrigation decision-making processes and conditions: a case study of Sri Lanka's Kirindi Oya Irrigation Settlement Project AgEcon
Nijman, Charles.
Detailed study of decision-making processes and managerial conditions of the Kirindi Oya Irrigation and Settlement Project in Sri Lanka, adopting a management perspective in the analysis of the performance of this major irrigation system in Sri Lanka. This paper is a companion document to "Irrigation management processes and conditions" by the same author.
Tipo: Book Palavras-chave: Irrigation management; Decision making; Farmer-agency interactions; Accountability; Case studies; Sustainability; River basin development; Water allocation; Water requirements; Project appraisal; Indicators; Crop Production/Industries; Farm Management; Institutional and Behavioral Economics.
Ano: 1992 URL: http://purl.umn.edu/114040
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More crop per drop International Rice Research Institute
Carriger, Sarah; Vallee, Domitille.
p.10-13
Tipo: Article Palavras-chave: Water requirements; Rice; Water supply; Irrigation.
Ano: 2007 URL: http://hdl.handle.net/10269/7
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Producing more rice with less water from irrigated systems International Rice Research Institute
Guerra, L.C.; Bhuiyan, S.I.; Tuong, T.P.; Barker, R..
22 p. IRRI Discussion Paper Series no. 29
Tipo: Technical Report Palavras-chave: Irrigation; Water requirements; Water use efficiency; Production; Irrigated rice.
Ano: 1998 URL: http://hdl.handle.net/10269/149
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Strategic Analyses of the National River Linking Project (NRLP) of India, Series 1. India’s water future: scenarios and issues AgEcon
Tipo: Book Palavras-chave: River basins; Environmental flows; Development projects; Water requirements; Irrigated farming; Water demand; Food demand Groundwater irrigation; Irrigation efficiency; Water harvesting; Supplemental irrigation; Water productivity; Water conservation; Drip irrigation; Sprinkler irrigation; Rainfed farming; Agricultural policy; Agricultural and Food Policy; Farm Management.
Ano: 2009 URL: http://purl.umn.edu/113261
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Submerged at IRRI: Development of waterproof rice International Rice Research Institute
Mackill, David.
Powerpoint presentation; 42 slides
Tipo: Presentation Palavras-chave: Rice; Water requirements; Submergence tolerance; Breeding.
Ano: 2007 URL: http://hdl.handle.net/10269/44
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Submergence tolerance : physiology of water proof rice International Rice Research Institute
Ismail, Abdel.
Tipo: Presentation Palavras-chave: Rice; Water requirements; Submergence tolerance.
Ano: 2006 URL: http://hdl.handle.net/10269/27
Registros recuperados: 27
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