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Registros recuperados: 18
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Adaptation of diverse cowpea (Vigna unguiculata (L.) Walp) cultivars to excess moisture and drought in rice land International Rice Research Institute
Timsina, Jagadish.
243 p. : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Cowpeas; Vigna unguiculata; Cultivars; Water requirement; Drought tolerance; Soil water; Rice; Crop rotation; Cropping systems.
Ano: 1989 URL: http://hdl.handle.net/123456789/1097
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Assessing water availability and irrigation requirement for increasing dry season rice production in coastal polder areas of Bangladesh International Rice Research Institute
Sharifullah, Abul Kalam.
xix, 199 p. : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Irrigation; Water requirement; Yield; Bangladesh.
Ano: 2008 URL: http://hdl.handle.net/123456789/335
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Differential water management practices at the farm level for dry season crops in the Upper Talavera River Irrigation System International Rice Research Institute
Mondal, Manoranjan K..
101 l. : ill. Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Water requirement; Water management; Irrigation systems; Dryland farming; Philippines.
Ano: 1988 URL: http://hdl.handle.net/123456789/1205
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Evapotranspiration and crop coefficients of corn in monoculture and intercropped with jack bean AGRIAMBI
Araújo,Mário S. P. de; Sousa,Elias F. de; Pereira,Vinícius R.; Ferreira,Fernando H. A.; Carvalho,Daniel F. de.
ABSTRACT This study was carried out to determine the evapotranspiration (ETc) and crop coefficients (Kc) for four stages of “Caatingueiro” corn under the climate condition of Seropédica, RJ, Brazil, using weighing lysimeters. The field trial occurred in 2015, from March 18 to June 25, in two areas cultivated with “Caatingueiro’ corn intercropped with jack bean and in monoculture. The reference evapotranspiration (ETo) was estimated by the FAO-56 Penman-Monteith model and the Kc values were determined by the ratio between ETc and ETo. The Kc values obtained for the intercropping and monoculture systems, were respectively: 0.78 (I); 1.01 (II); 1.10 (III) and 1.01 (IV), and 0.62 (I); 0.92 (II); 1.27 (III) and 0.81 (IV), and they were different from the values...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water requirement; Weighing lysimeter; Irrigation; Organic cultivation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000100027
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Evapotranspiration and crop coefficients of Moringa oleifera under semi-arid conditions in Pernambuco AGRIAMBI
Santos,Célia S. dos; Montenegro,Abelardo A. de A.; Santos,Márcio A. L. dos; Pedrosa,Elvira M. R..
ABSTRACT Efficient water use in agriculture is fundamental, especially in semi-arid regions where water scarcity is intense. The aim of this study was to estimate water requirements and crop coefficients in the different phenological stages of Moringa oleifera. The experiment was carried out from February to April 2015 at the Experimental Unit for Reuse and Hydrological Management, located in Mutuca, PE (7º 15’ 18’’ S, 35º 52’’ 40’’ W, 550 m). A lysimeter was used to estimate crop evapotranspiration. Reference evapotranspiration (ETo) was estimated by indirect methods. In the lysimeter, soil salinity and leaf water potential of the crop were monitored. The direct and indirect methods presented an excellent performance compared with the standard...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation management; Water requirement; Perennial oilseed crop.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001200840
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Growth and yield of selected cowpea (Vigna unguiculata L. Walp) and mungbean (Vigna radiata L. Wilczek) varieties at varying moisture regimes in a dryland environment International Rice Research Institute
Rodriguez, Reynaldo C..
143 l. : ill. Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Cowpeas; Vigna unguiculata; Mung beans; Vigna radiata; Soil water regimes; Water requirement; Plant growth; Yields; Varieties; Dryland farming.
Ano: 1987 URL: http://hdl.handle.net/123456789/1274
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HIGH PRECISION WEIGHING LYSIMETERS FOR EVAPOTRANSPIRATION MEASUREMENTS OF SUGARCANE PRE-SPROUTED PLANTLETS REA
Libardi,Luís G. P.; Faria,Rogério T. de; Dalri,Alexandre B.; Rolim,Glauco de S.; Palaretti,Luiz F..
Abstract Sugarcane pre-sprouted plantlets (PSP) production system is an innovative method to enhance crop multiplication rate. Determination of crop evapotranspiration (ETc) is crucial for water requirement identification throughout the plant cycle for irrigation management. ETc can be satisfactorily measured by weighing lysimeters. The objective of the study was to construct and calibrate three low-cost weighing lysimeters to measure ETc of PSP. The built lysimeters had 0.6909 m2 area (1179 mm × 586 mm), with 400 mm depth supported by 3 load cells. Lysimeters calibration showed excellent precision measurements, due to high linear correlation (R2 = 1.0000) between electric signal and equivalent mass, high accuracy, confirmed by mean absolute error between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Irrigation; Water balance; Water requirement.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000200208
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LEAF TEMPERATURE AND TRANSPIRATION OF PEQUI TREES WITH AND WITHOUT WATER RESTRICTION REA
Miranda,Raiane F.; Alves Júnior,José; Casaroli,Derblai; Evangelista,Adão W. P.; Batisti,Rafael.
ABSTRACT The answers to when and how much to irrigate orchards can be obtained based on the measurements of plants' transpiration and leaf temperature. This study aims to determine the leaf temperature and sap flow of the pequi tree (Caryocar brasiliense Camb.), both with and without water restriction. Further, the leaf temperature was measured by infrared thermometry and estimated transpiration using the Granier method, where the thermal dissipation probes are inserted into the plant stems. The experiment was conducted in a 120-plant orchard located in Goiânia-GO, Brazil, from which seven of the plants (3 irrigated and 4 non-irrigated; aged 6.6–7.4 years) were evaluated for eight months (October 2015 to May 2016). The soil was characterized as a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Caryocar brasiliense Camb.; Water requirement; Water deficit; Brazilian Savannah.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500579
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Marketable yield of onion under different irrigation depths, with and without mulch AGRIAMBI
Carvalho,Daniel F. de; Ribeiro,Eduardo C.; Gomes,Daniela P..
ABSTRACT The objectives of this study were to obtain the onion crop coefficients and evaluate the influence of different irrigation depths (0, 22, 45, 75 and 100% of crop evapotranspiration) on marketable yield and quality of onion bulbs cultivated with and without mulch of elephant grass. The experiment was carried out in Seropédica, RJ, Brazil, from May to September 2012, in a Red Yellow Argisol. The experimental design was in randomized blocks in split plots, with 10 treatments and seven replicates. Irrigation management was performed through soil water balance using the Time Domain Reflectometry technique, with probes installed horizontally at 7.5 and 22.5 cm depths. The use of mulch allowed the application of smaller irrigation depths, leading to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crop coefficient; Water requirement; Allium cepa L.; Vegetable grass residues.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000200107
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Metodologia para determinar as necessidades de agua das culturas irrigadas. Infoteca-e
SILVA, M. A. da; CHOUDHURY, E. N.; GUROVICH, L. A.; MILLAR, A. A..
Estudos realizados dao como potencial irrigavel para a regiao do Vale do Sao Francisco cerca de 800.000 ha, levando-se em conta nao somente o fator classe de solo, mas, tambem os recursos hidricos disponiveis. Por problemas hidraulicos e operacionais esses projetos de irrigacao deverao ser operados sob um conjunto de normas pre-estabelecidas do ponto de vista agricola e operacional visando o uso de racionalizacao dosseguintes aspectos: turno de rega para a distribuicao de agua as parcelas, ao longo do periodo de desenvolvimento de cada cultura; lamina de agua aplicada fixa, ao longo do periodo de desenvolvimento da cultura; metodos de irrigacao de alta eficiencia, de aplicacao e operacao faceis e economicos. Estas normas tem por objetivo utilizar...
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: Necessidade; Agricultura irrigada; Irrigação; Água; Método; Agriculture; Irrigation; Water requirement.
Ano: 1981 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133327
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Participatory irrigation management for efficient water use and enhanced rice productivity in Tamil Nadu, India International Rice Research Institute
Chandrasekaran, B.; Nandhagopal, A.; Palanisami, K.; Sivakumar, S. D.; Balasubramanian, V.; Rajendran, R..
p.69-70
Palavras-chave: Irrigation; Irrigation water; Water requirement; Water use efficiency; Productivity; India.
Ano: 2004 URL: http://hdl.handle.net/123456789/1047
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Performance of three soybean (Glycine Max (L.) cultivars at varying watertable depths International Rice Research Institute
Alagos, Mary Jacqueline C..
77, 20 l. Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Soybeans; Plant physiology; Plant anatomy; Water requirement; Water table; Variety trials; Cultivars.
Ano: 1990 URL: http://hdl.handle.net/123456789/1074
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Production and yield response factor of sunflower under different irrigation depths AGRIAMBI
Azevedo,Benito M. de; Vasconcelos,Denise V.; Bomfim,Guilherme V. do; Viana,Thales V. de A.; Nascimento Neto,Joaquim R. do; Oliveira,Kárcia M. A. S. de.
ABSTRACT Local information about irrigation depths for sunflower can be used in the design of projects and irrigation management to increase crop yield and to reduce costs. This study aimed to evaluate the effects of irrigation depths on sunflower and calculate its yield response factor. The experiment was conducted in Fortaleza-CE, Brazil, in a randomized block design, with six treatments, four replicates and ten evaluated plants per plot. The treatments were applied in the phenological stages II, III and IV with irrigation depths equivalent to 25, 50, 75, 100, 125 and 150% of crop evapotranspiration. The yield response factor was calculated according to FAO Bulletin nº 33. The water supply, equivalent to 79.7 and 91.1% of crop evapotranspiration,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helianthus annuus; Water requirement; Drip irrigation.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000500427
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Rendimiento potencial del maíz en el Distrito de Riego 063 Guasave, Sinaloa bajo diferentes fechas de siembra aplicando el modelo hybrid maize. Colegio de Postgraduados
Aguirre Rojo, José Anastacio.
Gracias al desarrollo de herramientas de simulación, como medio de obtención de soluciones prácticas, aplicadas a problemas de ingeniería y partiendo de la modelación de procesos físicos del ciclo hidrológico, se ha logrado describir al menos en parte la complejidad de los fenómenos que ocurren en la naturaleza, como lo es la simulación del crecimiento de los cultivos, en este caso específico del maíz. Debido a la importante producción anual de maíz que produce el Distrito de Riego 063 Guasave, Sinaloa y a las significativas pérdidas de cultivo de maíz sufridas a causa de las bajas temperaturas registradas en febrero de 2011 se decidió realizar la presente investigación que comprende la estimación de los rendimientos de maíz en la resiembra del mes de...
Palavras-chave: Modelo de simulación; Maíz; Distrito de Riego 063; Rendimiento potencial; Requerimiento hídrico; Simulation model; Corn; 063 Irrigation District; Yield potential; Water requirement; Hidrociencias; Maestría.
Ano: 2012 URL: http://hdl.handle.net/10521/964
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Water consumption of the estevia (Stevia rebaudiana (Bert.) Bertoni) crop estimated through microlysimeter Scientia Agricola
Fronza,Diniz; Folegatti,Marcos Vinícius.
The knowledge of water requirement of crops in the different growing phases elicits higher crop yield and rational use of water resource. The aim of this work was to estimate the water consumption of stevia using two constant watertable microlysimeters. The research was conducted in San Piero a Grado, Pisa, Italy. The data were collected daily from June, 1st, to October, 22th, 2000. Reference evapotranspiration was determined by the Penman-Monteith-FAO method, in the same period. Microlysimeters watertables level were maintained at the 35 cm depth. Crop evapotranspiration for the total cicle (80 days) was 464 mm. For the most water consuming phase, crop average evapotranspiration was 5.44 mm day-1. The crop coefficient values were 1.45 for the first 25...
Tipo: Info:eu-repo/semantics/report Palavras-chave: Lysimeter; Water requirement; Evapotranspiration.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300028
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Water saving in lowland rice production: an experimental and modelling study International Rice Research Institute
Belder, P..
132 p. : ill. Thesis (Ph.D.) -- Wageningen University.
Tipo: Thesis Palavras-chave: Rice; Irrigation; Water requirement; Models; Mathematical models; Field experimentation; Plant-eater relations; Yields; Lowlands; Lowland rice.
Ano: 2005 URL: http://hdl.handle.net/10269/176
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Wet seeded rice for increasing land and water productivity in Jatiluhur irrigation system, West Java, Indonesia International Rice Research Institute
Syamsiah, Iis.
xvi, 121 leaves : ill., maps.Thesis (M.S.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Irrigation; Planting; Water requirement; Indonesia.
Ano: 1998 URL: http://hdl.handle.net/123456789/541
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ความต้องการน้ำและค่าสัมประสิทธิ์การใช้น้ำของอ้อยพันธุ์ขอนแก่น 3 Thai Agricultural
Kobkiet Paisancharoen; Taksina Sansayawichai; Suphakarn Luanmanee; Srisuda Thippayarugs; Kasem Chusorn; Jindarut Chuenrung; Chayant Pakdeethai.
Water requirement for plant cane and ratoon cane of Khon Kaen 3 sugarcane variety was studied on Fine-loamy, siliceous Typic Kandiustults namely Warin soil series at Khon Kaen Field Crops Research Center (KKFCRC) since November, 2009 to December, 2011. Plot experimental design was RCB with 3 replications and 6 treatments, consisted of 1) No water (rain-fed condition as control) 2) Supplemental water by drip irrigation as 12.5% of available water capacity (AWC) level from 30-240 DAP 3) Supplemental water as 25.0% of AWC 4) Supplemental water as 37.5% of AWC 5) Supplemental water as 50.0% of AWC and 6) Bare soil. Weekly crop water uptakes for sugarcane and soil evaporation were recorded from the plots of 9x9 m and the crop coefficient (Kc) was re-derived....
Tipo: Collection Palavras-chave: Sugarcane; Ratoon cane; Khon Kaen 3 variety; Water requirement; Kc value; Warin soil series; อ้อยปลูก; อ้อยตอ; อ้อยพันธุ์ขอนแก่น 3; ความต้องการน้ำ; ค่าสัมประสิทธิ์การใช้น้ำ; การจัดการน้ำ; ชุดดินวาริน.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5337
Registros recuperados: 18
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