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De Magistris T.,Research Center cnologia Agroalimentaria Of Aragon Cita | Del Giudice T.,University of Naples Federico II | Verneau F.,University of Naples Federico II
Journal of Consumer Affairs | Year: 2015

The objective of this study was to assess the role of information in consumers' willingness to pay (WTP) for food products with corporate social responsibility (CSR) certification. The item used for the experimental design was canned tuna fish, a product on the market that is already exhibiting various kinds of certification related to social and environmental attributes. Two different kinds of certifications were examined, namely Friend of the Sea, which involves environmental aspects, and SA8000, related to workers' rights and more general social attributes. We implemented experimental auctions, taking into account three information treatments. The initial findings show that the WTP for both CSR labels is higher than the WTP for tuna fish without any CSR certification. Nevertheless, the information provided on CSR certification did not change consumers' WTP among the certification schemes. Our findings could also serve to fine-tune marketing strategies to consumer preferences and determine which CSR activities are worth undertaking. © 2014 by The American Council on Consumer Interests. Source


Gracia A.,Research Center cnologia Agroalimentaria Of Aragon Cita | Loureiro M.L.,University of Santiago de Compostela | Nayga R.M.,University of Arkansas
American Journal of Agricultural Economics | Year: 2011

Due to the importance of comparability and external validity of results, nonhypothetical experimental methods are increasingly used to elicit consumers' willingness to pay for various goods. Two of the increasingly popular preference elicitation methods are the nonhypothetical choice experiments and experimental auctions. We conduct experiments to compare willingness to pay estimates elicited from both methods. Our results generally suggest that valuations elicited from experimental auctions can differ from those obtained from nonhypothetical choice experiments. © TheAuthor (2011). Published by Oxford University Press on behalf of the Agricultural and Applied Economics Association. All rights reserved. Source


Aragues R.,Research Center cnologia Agroalimentaria Of Aragon Cita | Medina E.T.,Research Center cnologia Agroalimentaria Of Aragon Cita | Zribi W.,Research Center cnologia Agroalimentaria Of Aragon Cita | Claveria I.,Research Center cnologia Agroalimentaria Of Aragon Cita | Faci J.,Research Center cnologia Agroalimentaria Of Aragon Cita
Irrigation Science | Year: 2015

Deficit irrigation (DI) strategies using moderately saline waters save water, but may enhance soil salinization. Based on data gathered during years 2007-2012 in three drip-irrigated grapevine, peach, and nectarine crops subjected to several irrigation and soil-mulching treatments, we assessed trends in root-zone soil salinity [saturation extract electrical conductivity (ECe)], related the changes in soil salinity (ΔECe) to field-wide leaching fraction (LF), evaluated management strategies for soil salinity control, and examined the sustainability of DI strategies under present and expected climate change (CC) scenarios in the Middle Ebro River Basin (ERB, Spain). ECe increased in 82 % of the irrigation seasons and decreased in 75 % of the non-irrigation seasons examined. Soil salinization trends were not apparent during the study years due to these annual salt accumulation-salt leaching cycles. ECe increases were higher in the more severe DI treatments and in the geotextile-mulched soil and lower in the full and less severe irrigation treatments and in the organic-mulched soil. As expected, ΔECe and LF were linearly and negatively correlated (P < 0.01), indicating that soil salinization increased with decreasing LF. These linear relationships provided a way to evaluate best management strategies (increased irrigation, rainfall harvesting, and soil mulching) for soil salinity control. These strategies decreased soil salinization, but did not guarantee the sustainability of severe DIs in the study area. The application of these relationships to the CC precipitation and crop evapotranspiration projections in the ERB shows that the examined DI strategies will be unsustainable due to soil salinization. © Springer-Verlag Berlin Heidelberg 2014. Source


Guerra M.E.,Research Center Agraria Finca La Orden Valdesequera | Wunsch A.,Research Center cnologia Agroalimentaria Of Aragon Cita | Lopez-Corrales M.,Research Center Agraria Finca La Orden Valdesequera | Rodrigo J.,Research Center cnologia Agroalimentaria Of Aragon Cita
Journal of the American Society for Horticultural Science | Year: 2010

Flower emasculation is widely used in breeding programs for hybridization of fruit trees. In japanese plum (Prunus salicina), some genetic crosses made by emasculation have resulted in very low or lack of fruit set, but the causes leading to this situation are not clear. In this work, the influence of flower emasculation on fruit set was evaluated in four japanese plum-type cultivars by comparing cross-pollinations performed with and without emasculation. Fruit set and fruit drop in the crosses were characterized until harvest. To ascertain which factors in the reproductive process could be related to the lack of fruit set, compatibility was determined for each cross by the observation of pollen tube growth under the microscope and by polymerase chain reaction. Likewise, the stage of ovule development was observed under the microscope in emasculated and non-emasculated flowers. An analysis of the different pollination treatments and the study of the compatibility relationships helped to dismiss factors that intervene in the reproductive process and to identify flower emasculation as the cause of premature degeneration of ovules and its implication in determining subsequent fruit set. Source


Fernandez i Marti A.,Research Center cnologia Agroalimentaria Of Aragon Cita | Fernandez i Marti A.,University of California at Davis | Gradziel T.M.,University of California at Davis | Socias i Company R.,Research Center cnologia Agroalimentaria Of Aragon Cita
Plant Molecular Biology | Year: 2014

Self-compatibility in almond (Prunus dulcis) is attributed to the presence of the Sf haplotype, allelic to and dominant over the series of S-alleles controlling self-incompatibility. Some forms of the Sf haplotype, however, are phenotypically self-incompatible even though their nucleotide sequences are identical. DNA from leaves and styles from genetically diverse almond samples was cloned and sequenced and then analyzed for changes affecting Sf-RNase variants. Epigenetic changes in several cytosine residues were detected in a fragment of 4,700 bp of the 5′ upstream region of all self-compatible samples of the Sf-RNases, differentiating them from all self-incompatible samples of Sf-RNases analyzed. This is the first report of DNA methylation in a Rosaceae species and appears to be strongly associated with inactivation of the Sf allele. Results facilitate an understanding of the evolution of self-compatibility/self-incompatibility in almond and other Prunus species, and suggest novel approaches for future crop improvement. © 2014, Springer Science+Business Media Dordrecht. Source

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