404 research outputs found
La perspectiva de género y mujeres rurales en las estrategias y políticas de desarrollo territorial sostenible
44 páginas. Series Cuaderno Técnico (IICA) no. 24.Este documento pone énfasis en tres núcleos temáticos fundamentales: 1) explora la forma más adecuada de integrar las propuestas de desarrollo rural y las propuestas de enfoque de género; 2) refiere entre la perspectiva conceptual y el esfuerzo por realizar un diagnóstico actualizado de la situación estructural del campo en América Latina, especialmente en los países más rurales de la región; 3) explora las posibilidades que se derivan de la concepción territorial del desarrollo rural sostenibleEste documento pone énfasis en tres núcleos temáticos fundamentales: 1) explora la forma más adecuada de integrar las propuestas de desarrollo rural y las propuestas de enfoque de género; 2) refiere entre la perspectiva conceptual y el esfuerzo por realizar un diagnóstico actualizado de la situación estructural del campo en América Latina, especialmente en los países más rurales de la región; 3) explora las posibilidades que se derivan de la concepción territorial del desarrollo rural sostenible
Mejorando la competitividad y el acceso a los mercados de exportaciones agrícolas por medio del desarrollo y aplicación de normas de inocuidad y calidad: el ejemplo del espárrago peruano
En la actualidad Perú es el primer país exportador de espárragos del mundo, habiendo logrado desplazar a importantes países productores como China y Estados Unidos, y ser reconocido muldialmente por la calidad de su product
Using waste to reduce slope erosion on road embankments
“Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees" (www.transport-ice.com).
http://dx.doi.org/10.1680/tran.2006.159.1.15Urban waste may be used to reduce slope erosion of highway embankments. Whereas different kinds of compost have been tested in the USA for highway revegetation, sewage sludge has been used only for agricultural purposes. This paper presents the results of research carried out in order to study the viability of the application of sewage sludge compared with compost. Test areas measuring 4 m 3 5 m were constructed on a new highway embankment with 2 : 1 and 3 : 2 side slopes in the south of Spain. Crop cover and erosion were evaluated for plots with application of three dosages of compost and three dosages of sludge. Also, the costs of the proposed application are analysed. This treatment costs, on average, 0.24% of the budget for new roads infrastructure, and reduces soil loss by up to 30% on average. Based on these results, compost and sludge can be successfully used to reduce slope erosion on highway embankments. However, standards and specifications are required for their routine application.Department of Civil Engineering, University of Granada, Spai
Yield-scaled mitigation of ammonia emission from N fertilization: the Spanish case
Online supplementary data available from stacks.iop.org/ERL/9/125005/mmedia[EN] Synthetic nitrogen (N) fertilizer and field application of livestock manure are the major sources
of ammonia (NH3) volatilization. This N loss may decrease crop productivity and subsequent
deposition promotes environmental problems associated with soil acidification and
eutrophication. Mitigation measures may have associated side effects such as decreased crop
productivity (e.g. if N fertilizer application is reduced), or the release of other reactive N
compounds (e.g. N2O emissions if manure is incorporated). Here, we present a novel
methodology to provide an integrated assessment of the best strategies to abate NH3 from N
applications to crops. Using scenario analyses, we assessed the potential of 11 mitigation
measures to reduce NH3 volatilization while accounting for their side effects on crop
productivity, N use efficiency (NUE) and N surplus (used as an indicator of potential N losses by
denitrification/nitrification and NO3
− leaching/run-off). Spain, including its 48 provinces, was
selected as a case study as it is the third major producer of agricultural goods in Europe, and also
the European country with the highest increase in NH3 emissions from 1990 to 2011. Mitigation
scenarios comprised of individual measures and combinations of strategies were evaluated at a
country- and regional level. Compared to the reference situation of standard practices for the year
2008, implementation of the most effective region-specific mitigation strategy led to 63% NH3
mitigation at the country level. Implementation of a single strategy for all regions reduced NH3
by 57% at the highest. Strategies that involved combining mitigation measures produced the
largest NH3 abatement in all cases, with an 80% reduction in some regions. Among the strategies
analyzed, only suppression of urea application combined with manure incorporation and
incorporation of N synthetic fertilizers other than urea showed a fully beneficial situation: yieldscaled
NH3 emissions were reduced by 82%, N surplus was reduced by 9%, NUE was increased
by 19% and yield was around 98% that of the reference situation. This study shows that the
adoption of viable measures may provide an opportunity for countries like Spain to meet the
international agreements on NH3 mitigation, while maintaining crop yields and increasing NUEThe authors are grateful to the Spanish Ministry of Science and Innovation and the Autonomous Community of Madrid for their economic support through the NEREA project (AGL2012-37815- C05-01, AGL2012-37815-C05-04) and GASPORC (AGL2011-30023-C03) projects. We wish to thank the FIRE (Federation Ile de France de Recherche en Environment, CNRS and UPMC) as well as the Agrisost Project (S2009/AGR-1630). Eduardo Aguilera gratefully acknowledges funding by the 895-2011-1020 project (Canadian Social Sciences and Humanities Research Council). This paper has been produced within the context of the REMEDIA network (http://redremedia.wordpress.com).Sanz-Cobeña, A.; Lassaletta, L.; Estellés, F.; Del Prado, A.; Guardia Guardia, G.; Abalos, D.; Aguilera, E.... (2014). Yield-scaled mitigation of ammonia emission from N fertilization: the Spanish case. Environmental Research Letters. 9(12):1-12. https://doi.org/10.1088/1748-9326/9/12/125005S11291
Application of Decision Theory methods for a Community of Madrid Soil classification case
A land classification method was designed for the Community of Madrid (CM), which has lands suitable for either agriculture use or natural spaces. The process started from an extensive previous CM study that contains sets of land attributes with data for 122 types and a minimum-requirements method providing a land quality classification (SQ) for each land. Borrowing some tools from Operations Research (OR) and from Decision Science, that SQ has been complemented by an additive valuation method that involves a more restricted set of 13 representative attributes analysed using Attribute Valuation Functions to obtain a quality index, QI, and by an original composite method that uses a fuzzy set procedure to obtain a combined quality index, CQI, that contains relevant information from both the SQ and the QI methods
A multi-regional input-output analysis of ozone precursor emissions embodied in Spanish international trade
Higher levels of ozone in the troposphere is a severe threat to both environment and human health. Many countries are concerned about the effects that critical levels of ozone have on them. Countries pollute to satisfy their domestic and external demand (production perspective) and, at the same time, these countries also generate emissions abroad indirectly via their imports and via their domestic production (consumption perspective). Spain is one of the EU countries with the highest pollution records in the emissions of tropospheric ozone precursor gases. A multiregional input-output model (MRIO) allows us to analyze the total emissions embodied in Spanish international trade in 35 sectors within the EU area and the rest of the world. MRIO models, are commonly chosen as they provide an appropriate methodological framework for complete emissions footprint estimates at the national and supranational level The results show that the most polluting sectors involved in Spanish trade are Agriculture, Basic Metals, Coke and Refined Petroleum Production. Some policy recommendations follow these results; for example, a higher number of environmental regulations focused on the Agricultural sector, such as the introduction of codes of good practices in the use of fertilizers and the promotion of cleaner production technologies might lead to less burden to the environment.Ministerio de economía y competitividad (España) ECO 2014-56399-R. Claves para Desacoplar Crecimiento y Emisiones de Co2 en EspañaCátedra de economía de la energía y del medio ambiente (Universidad de Sevilla)Fundación Roger TornéJunta de Andalucía. SEJ 13
Plot-scale effects on runoff and erosion along a slope degradation gradient
[1] In Earth and ecological sciences, an important, crosscutting issue is the relationship between scale and the processes of runoff and erosion. In drylands, understanding this relationship is critical for understanding ecosystem functionality and degradation processes. Recent work has suggested that the effects of scale may differ depending on the extent of degradation. To test this hypothesis, runoff and sediment yield were monitored during a hydrological year on 20 plots of various lengths (1–15 m). These plots were located on a series of five reclaimed mining slopes in a Mediterranean‐dry environment. The five slopes exhibited various degrees of vegetative cover and surface erosion. A general decrease of unit area runoff was observed with increasing plot scale for all slopes. Nevertheless, the amount of reinfiltrated runoff along each slope varied with the extent of degradation, being highest at the least degraded slope and vice versa. In other words, unit area runoff decreased the least on the most disturbed site as plot length increased. Unit area sediment yield declined with increasing plot length for the undisturbed and moderately disturbed sites, but it actually increased for the highly disturbed sites. The different scaling behavior of the most degraded slopes was especially clear under high‐intensity rainfall conditions, when flow concentration favored rill erosion. Our results confirm that in drylands, the effects of scale on runoff and erosion change with the extent of degradation, resulting in a substantial loss of soil and water from disturbed systems, which could reinforce the degradation process through feedback mechanisms with vegetation
Priorización de la innovación tecnológica regional y las nuevas demandas del Sistema Agroalimentario y Agroindustrial en el Mercosur ampliado
Reunión del FORAGRO sobre prioridades regionales de investigación México, D.F. (México) 2-3 Mayo 2001.Este documento explica el proceso desarrollado por el Procisur para identificar y consensuar los grandes ejes de innovación (prioridades regionales) que pueden orientar la integración tecnológica del SAA y el rol que le cabría cumplir como facilitador de ese desafío regiona
Proyecto: uso de la coa industrial en las siembras manuales colectivas de frijol-poroto y maíz en la Comarca Ngãbe Buglé (CNB). Informe técnico final del proyecto
Este documento posee información sobre el informe técnico final del Proyecto uso de la coa industrial en las siembras manuales colectivas de frijol-poroto y maíz en la Comarca Ngãbe Buglé. Donde se resumen los resultados alcanzados
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