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| Registros recuperados: 21 | |
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| Mesa-Jurado, Maria A.; Berbel, Julio; Piston, Juan Maximo. |
| This paper reviews the application of a scenario for the 2015 agricultural policy and markets for the irrigated agriculture in Europe. Scenarios for irrigated agriculture 2015 are described in detail including Reformed CAP and how biofuel impacts demand. A model for irrigation water demand is applied at the basin level for the Guadalquivir River (Southern Spain). The methodology is based upon residual value of water and it combines budget and farm analysis at municipality level, with the Guadalquivir basin divided at 50 counties where 24 possible crops are selected and adapted specifically to each county yield and costs. The result is a comparative analysis between actual level of water use and value, and 2015 scenario at county level and later aggregated... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Irrigated agriculture; Value of water; Scenario analysis; Resource /Energy Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/43857 |
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| Ferreira,Elizabeth; Toledo,Joice H. de; Dantas,Antonio A. A.; Pereira,Rafael M.. |
| Medium-resolution satellite images have been widely used for the identification and quantification of irrigated areas by center pivot. These areas, which present predominantly circular forms, can be easily identified by visual analyses of these images. In addition to identifying and quantifying areas irrigated by center pivot, other information that is associated to these areas is fundamental for producing cadastral maps. The goal of this work was to generate cadastral mapping of areas irrigated by center pivots in the State of Minas Gerais, Brazil, with the purpose of supplying information on irrigated agriculture. Using the satellite CBERS2B/CCD, images were used to identify and quantify irrigated areas and then associate these areas with a database... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated agriculture; Remote sensing; Geographic information system (GIS); Image visual interpretation. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162011000400015 |
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| El-Fouly, Mohamed Mostafa; Shaaban, Samir Hosni. |
| A field experiment was carried out in Kafer El Kadera village at El–Monofia Governorate, during 5 consecutive years, 2010–2014, to test the effects of NPK and balanced fertilization on the yield and its components, and distribution of nutrients in different parts of maize (var.30K8).There was a significant increase of the number of leaves/plant, the length of cob, the number of rows in the cob and the number of grains in the row as a result of treated plants with NPK according to soil testing plus foliar application of micronutrients by 34.18, 27.94, 32.182, and 33.43%, respectively.There was also a significant increase in the chilling % rate, weight of 100 grains and yield of grain / plant, yield /ton/ha by 16.52, 35.39, 68.40, and 72.92%,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Maize; NPK fertilization; Nutrients distribution; Irrigated agriculture. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5463 |
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| Casado, Jose Maria; Gracia, Azucena. |
| The arable crop sector in Spain is highly dependent of the Community subsidies and account for 33% of total transfers received by the Community. Then, it is expected that the introduction of the Single Farm Payment (SFP) will drive important changes in the arable crop production in Spain. The quantitative assessment of the SFP impacts on the arable crop sector in Spain is the overall objective of this paper. To achieve this goal, an econometric, dynamic, multi-product and partial equilibrium commodity model has been built disaggregating between irrigated and non-irrigated land use for cereals called Spanish Econometric Simulation of Agricultural Policies (SESAP). Results indicated that the introduction of the SFP has only induced considerable changes... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: CAP reform; Partial equilibrium model; Policy modelling; Irrigated agriculture; Simulation; Land Economics/Use; Q12; Q18. |
| Ano: 2006 |
URL: http://purl.umn.edu/25709 |
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| Gomez-Limon, Jose Antonio; Gomez-Ramos, Almudena. |
| This paper analyses the demands from the society of Castilla y León (Spain) regarding its agricultural sector through the valuation of the relevance of its productive and non-productive functions. Additionally, it assesses the level of social satisfaction concerning the performance of these functions by irrigated agriculture in this region. For this purpose primary data colleted through a survey has been used. Results obtained show that the average citizen does not perceive a higher utility from irrigated agriculture compared with the whole agricultural sector. For these agricultural systems the social function is the element of multifunctionality considered most relevant regarding the perceived social welfare. Resumen Este trabajo analiza las demandas... |
| Tipo: Journal Article |
Palavras-chave: Multifunctionality; Social demand; Irrigated agriculture; Public perception; Castilla y Leon; Crop Production/Industries; Q25; Q15. |
| Ano: 2007 |
URL: http://purl.umn.edu/8001 |
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| Giovanelli,Luan B.; Oliveira,Rubens A.; Oliveira-Filho,Jair C.; Baptestini,Júlio C. M.; Delazari,Fábio T.; Sediyama,Gilberto C.. |
| ABSTRACT The choice for the most appropriate method to estimate evapotranspiration depends on the availability of meteorological data, required level of precision and cost of equipment acquisition. For this estimate, the Irrigameter is simple to operate, precise and economically viable to farmers. In addition, it collaborates in the application of the necessary water depth to crops, thus avoiding unnecessary energy consumption, environmental degradation, and increasing crop yield and improving crop quality. In this context, the objective of this research was to estimate the reference evapotranspiration using the Irrigameter, for the climatic conditions of the Southern Tocantins state, Brazil. The experimental design was completely randomized with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation management; Irrigated agriculture; Evaporator. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500293 |
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| Watanabe,Rafaela; Figueiredo,Getulio Coutinho; Silva,Álvaro Pires da; Neves,Júlio César Lima; Oliveira,Teogenes Senna de. |
| ABSTRACT In irrigated soils, a continuous state of high moisture reduces resistance of the soil to applied external forces, favouring compaction. The aim of this study was to evaluate the susceptibility to compaction of developed calcareous soils in irrigated annual and perennial cropping systems of the Apodi Plateau, located in the Brazilian semi-arid region. Four areas of irrigated crops were evaluated: banana after two (B2) and 15 (B15) years cultivation, pasture (P), and a corn and beans succession (MB), as well as the reference areas for soil quality and corresponding natural vegetation (NVB2, NVB15, NVP and NVMB). Samples were collected at layers of 0.00-0.10 and 0.20-0.30 m; and for B2 and B15, samples were collected in the row and inter-row spaces.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated agriculture; Soil quality; Load capacity; Trampling by animals. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100522 |
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| Alface,Angelo B.; Pereira,Silvio B.; Filgueiras,Roberto; Cunha,Fernando F.. |
| ABSTRACT The use of satellite images as a complement in irrigation management constitutes a primordial basis in the decision-making process for irrigated agriculture. In this context, the present study aimed to monitor through Normalized Difference Vegetation Index (NDVI) an irrigated sugarcane field belonging to the Mafambisse company, located at the District of Nhamatanda/Sofala, Republic of Mozambique, and establish its relationship with the crop coefficient established by FAO (kcFAO) and fit a regression model to estimate crop coefficient (kc) from the relationship between NDVI and kcFAO. The study was conducted using a series of Sentinel-2A/MSI images, relative to the period from October 2016 to October 2017. Based on the NDVI images generated, it was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated agriculture; Geotechnology; GIS. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000500330 |
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| Matsinhe,Daniel Zefanias; Pereira,Silvio Bueno; Oliveira,Rubens Alves de; Assis,Igor Rodrigues de; Oliveira,Reginaldo Miranda. |
| ABSTRACT Irrigation has a great importance in the production of food, and it is responsible for consuming a large part of the water used by human activities. This makes the rational management of water use fundamental for sustainable food production. For this purpose, the determination of bulk density is important and needs to be obtained with the simplest, least onerous methods possible, while maintaining precision and accuracy. Therefore, the objective of this work was to evaluate the use of PVC pipes of different dimensions to determine bulk density. For comparison purposes, the volumetric ring, paraffin clod, beaker and excavation methods were also used. Deformed and undisturbed soil samples of different granulometries were collected at the depths of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water use; Irrigated agriculture; Soil management. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100027 |
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| Berbel, Julio; Mesa, Pascual. |
| La estimación del valor del agua puede hacerse mediante diferentes métodos, de los cuales este trabajo propone el método de precios "quasi-hedónicos". El agua se considera en este trabajo como una variable externa que impacta en el precio diferencial de la tierra, y cuyo valor estimamos para la Cuenca del Guadalquivir. Los resultados nos muestran un valor capital del agua en el rango 2,8 €/m3 a 4,2 €/m3 con un valor más frecuente de 3,46 €/m3, que según el tipo de capitalización empleado nos daría un valor medio de renta del agua entre 0,14 €/m3 (para r=4%) a 0,35 €/m3 (para r=10%). ABSTRACT The valuation of natural resources is a tool used for improving allocation and management of water resources. This research proposes a quasi-hedonic approach as a... |
| Tipo: Journal Article |
Palavras-chave: Irrigated agriculture; Hedonic price; Environmental valuation; Water value; Agricultura de riego; Precios hedónicos; Valoracion ambiental; Valor del agua; Resource /Energy Economics and Policy; Q25; C13. |
| Ano: 2007 |
URL: http://purl.umn.edu/7059 |
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| Silva,Felipe Bernardes; Pereira,Silvio Bueno; Martinez,Mauro Aparecido; Silva,Demetrius David da; Vieira,Nayara Paula Andrade. |
| ABSTRACT The present work was performed by applying the principal component analysis, in order to compare the water needs of banana, mango, grape, sugarcane, maize and beans crops in different regions of the São Francisco river basin, aiming to identify the climate elements that most influence the reference evapotranspiration (ET0) in the locations of Pirapora-MG, Jaíba-MG, Barreiras-BA and Petrolina-PE. In addition, the locations with more similarities, according to the evaluated parameters, were verified by applying cluster analysis, and the equivalence relations between the studied crops were determined by integrating the parameters related to the climatic elements and the characteristics of crops and soils. Based on the principal components analysis,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated agriculture; Crop water balance; Climatic parameters; Evapotranspiration. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300409 |
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| Nogueira,Sandra Furlan; Paula,Alessandra Monteiro de; Pereira,Bruno Fernando Faria; Salemi,Luiz Felippe; Fonseca,Adriel Ferreira da; Montes,Célia Regina; Victoria,Reynaldo Luiz. |
| This study investigated the microbial metabolism in Bermuda-grass Tifton 85 areas after potable-water and effluent irrigation treatments. The experiment was carried out in Lins/SP with samples taken in the rainy and dry seasons (2006) after one year and three years of irrigation management, and set up on an entirely randomized block design with four treatments: C (control, without irrigation or fertilization), PW (potable water + 520 kg of N ha-1 year-1); TE3 and TE0 (treated effluent + 520 kg of N ha-1 year-1) for three years and one year, respectively. The parameters determined were: microbial biomass carbon, microbial activity, and metabolic quotient. Irrigation with wastewater after three years indicated no alteration in soil quality for C and ET3; for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reuse; Irrigated agriculture; Microbial respiration; Cmic; QCO2. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300007 |
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| Registros recuperados: 21 | |
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