Centro Camino Of Purchil

Granada, Spain

Centro Camino Of Purchil

Granada, Spain
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Colombo S.,Centro Camino Of Purchil | Perujo Villanueva M.,IFAPA Centro del Llano
New Medit | Year: 2017

Oliv e trees in the Mediterranean countries comprise the most widespread fruit-tree crop. Spain, Italy and Greece, the three main producer countries in Europe, account for 65% of the total world production. The production structure of olive farms in these countries is mainly characterized by traditional small-scale management. In addition to a small size, these farms also have a highly fragmented structure, typically made of several scattered parcels. The fragmented structure hampers farm competitiveness by raising production costs. This leads to a progressive exclusion of these farms from international markets and eventually to land abandonment. Here, we quantify the inefficiency due to parcel fragmentation, in particular losses due to the border effect, and we propose farmers' cooperation as a measure to reduce such losses. The results indicate significantly lower efficiency due to parcel fragmentation. Currently, farmers are managing around 14.4% of olive orchards inefficiently relative to a comparable situation without fragmentation. The results call for specific agricultural policies that foster cooperation among farmers in order to reduce parcel fragmentation and production costs.

Castel J.M.,University of Seville | Ruiz F.A.,Centro Camino Of Purchil | Mena Y.,University of Seville | Sanchez-Rodriguez M.,University of Cordoba, Spain
Small Ruminant Research | Year: 2010

This article presents the evolution, actual situation and prospects for goat production systems in Spain, taking into account the present day changes of socio-economic, technological and agricultural policies of the European Union (EU). Spain is ranked second in goat population and third in goat milk yield within the EU, nevertheless, similar to the situation in the EU, the goat production systems in Spain are in a critical situation, basically because of the increasing production costs and the lack of a strong central structure in this sector. To improve viability of goat farms in Spain, which, for the most part play an important social and environmental role in the less-developed rural areas, it is necessary to establish a series of strategies. These strategies include: (i) strengthening of the central structure in the sector; (ii) improvement in the training and management capacity of goat farmers and cheese makers; (iii) enhancement of promotion and recognition of goat-related products; (iv) taking advantage of the opportunities offered by the new European Union Common Agricultural Policy; (v) improvement of farmers' quality of life, so that they can maintain their goat operations for future generations; and (vi) increasing development and research activities in this sub-sector of livestock farming. © 2009 Elsevier B.V. All rights reserved.

Lopez-Gomez M.,IRTA - Institute of Agricultural-Alimentary Research and Technology | Flor-Peregrin E.,Centro Camino Of Purchil | Talavera M.,Centro Camino Of Purchil | Sorribas F.J.,Polytechnic University of Catalonia | Verdejo-Lucas S.,IRTA - Institute of Agricultural-Alimentary Research and Technology
Crop Protection | Year: 2015

The relationship between the initial (Pi) and final (Pf) population densities of Meloidogyne javanica in response to increasing initial inoculum levels and the effect on yield in zucchini cv. Amalthee (Cucurbita pepo L.) was determined using a geometric series of 12 Pi from 0 to 51,200 eggs/100cm3 of soil in pot experiments in a greenhouse. The maximum multiplication rate was 425, and the equilibrium density was 701,951 eggs/100cm3 soil. The relative yield, represented as dry top weight, fit the Seinhorst damage function model and the minimum relative yield (m) was 0.82 and the tolerance limit (T) was 402J2/100cm3 soil. Regression analyses indicated a negative relationship between the Pi and the leaf chlorophyll content (LCC) 40, 50, 60, and 70 days post-inoculation. The Pi and LCC fit the Seinhorst damage-function model. Zucchini cv. Dyamant was planted in a plastic greenhouse with a range of M.javanica Pi from 0 to 861J2/100cm3 soil. The maximum multiplication rate of M.javanica under field conditions was 3093, and the equilibrium density was 1485J2/100cm3 soil. The relationship between Pi and relative yield, represented as fruit weight, fit the Seinhorst damage function model (P<0.0001, R2=0.78); m was 0.48, and T was 0.02J2/100cm3 soil. © 2014 Elsevier Ltd.

Lopez-Gomez M.,IRTA - Institute of Agricultural-Alimentary Research and Technology | Talavera M.,Centro Camino Of Purchil | Verdejo-Lucas S.,IRTA - Institute of Agricultural-Alimentary Research and Technology | Verdejo-Lucas S.,Centro La Mojonera
Plant Pathology | Year: 2016

The suitability of watermelon cultivars and cucurbit rootstocks as hosts to Meloidogyne incognita and M. javanica was determined in pot and field experiments. Meloidogyne incognita showed higher reproduction than did M. javanica on watermelon and cucurbit rootstocks. The watermelon cultivars did not differ in host status when challenged with these two species and supported lower nematode reproduction than the cucurbit rootstocks. Rootstocks Lagenaria siceraria cv. Pelops and Cucurbita pepo AK15 supported lower reproduction than did the squash hybrid rootstocks (C. maxima × C. moschata). Egg production increased (P < 0·05) with a rising initial inoculum level (Pi) in the non-grafted Sugar Baby but the reproduction factor Rf (eggs per plant/Pi) was similar at two Pi levels. The total egg production in the plants grafted onto squash hybrids RS841 and Titan was greater (P < 0·05) at the higher Pi, but the Rf values were lower. The development of field-grown non-grafted watermelon plants was significantly stunted in plots where nematodes were detected at planting. However, no differences were observed in plots with grafted plants. In plots with nematodes, non-grafted and Titan-grafted plants had similar yields that were higher than that of RS841-grafted plants. In the commercial plastic houses with grafted watermelon, the average Rf value was 42-fold, confirming the high susceptibility of squash hybrids as rootstocks for grafted watermelon. The Titan-Sugar Baby combination was tolerant to M. javanica. © 2016 British Society for Plant Pathology.

PubMed | IRTA - Institute of Agricultural-Alimentary Research and Technology, Centro La Mojonera and Centro Camino Of Purchil
Type: Journal Article | Journal: Journal of nematology | Year: 2015

The host suitability of five zucchini and three cucumber genotypes to Meloidogyne incognita (MiPM26) and M. javanica (Mj05) was determined in pot experiments in a greenhouse. The number of egg masses (EM) did not differ among the genotypes of zucchini or cucumber, but the eggs/plant and reproduction factor (Rf) did slightly. M. incognita MiPM26 showed lower EM, eggs/plant, and Rf than M. javanica Mj05. Examination of the zucchini galls for nematode postinfection development revealed unsuitable conditions for M. incognita MiPM26 as only 22% of the females produced EM compared to 95% of the M. javanica females. As far as cucumber was concerned, 86% of the M. incognita and 99% of the M. javanica females produced EM, respectively. In a second type of experiments, several populations of M. arenaria, M. incognita, and M. javanica were tested on zucchini cv. Amalthee and cucumber cv. Dasher II to assess the parasitic variation among species and populations of Meloidogyne. A greater parasitic variation was observed in zucchini than cucumber. Zucchini responded as a poor host for M. incognita MiPM26, MiAL09, and MiAL48, but as a good host for MiAL10 and MiAL15. Intraspecific variation was not observed among the M. javanica or M. arenaria populations. Cucumber was a good host for all the tested populations. Overall, both cucurbits were suitable hosts for Meloidogyne but zucchini was a poorer host than the cucumber.

Duran Zuazo V.H.,Centro Las Torres Tomejil | Rodriguez Pleguezuelo C.R.,Centro Camino Of Purchil | Francia Martinez J.,Centro Camino Of Purchil | Martin Peinado F.J.,University of Granada
Journal of Land Use Science | Year: 2013

Resource use and watershed management have become an increasingly important issue, stressing the need to find appropriate management approaches for improving agricultural landscapes. We analysed land-use changes from 1978 to 2007 in a representative watershed of Almuñécar (SE Spain). In 1978 the watershed consisted of 64.2% almond, 24.7% fallow land, 6.7% vineyard, 1.9% olive and 2.5% other uses. In 2007 much of the traditional orchards had disappeared, leaving only 17% almond and 0.6% vineyard. Not less than 29.8% had become shrubland and another 24.6% abandoned cropland. However, much of the land is now under subtropical crops: 19.2% avocado (Persea americana M.), 3.9% mango (Mangifera indica L.), 2.4% loquat (Eriobotrya japonica L.) and 1.1% cherimoya (Annona cherimola M.). This intensively irrigated agriculture with subtropical trees on terraces could exacerbate watershed degradation and could become a core problem with implications for sustainable resource use. The abandonment of traditional terraces with rainfed crops has led to the re-emergence of spontaneous native vegetation, promoting a denser plant cover and subsequent decrease in erosion. Therefore, highlighting the need for implementing sustainable conservation practices is crucial as part of future agricultural support. © 2013 Copyright Taylor and Francis Group, LLC.

Glenk K.,Macaulay Institute | Glenk K.,Land economics and Environment Research Group | Colombo S.,Centro Camino Of Purchil
Climatic Change | Year: 2011

Soil carbon sequestration has been regarded as a cheap and cost-effective way to sequester carbon until other technologies to tackle climate change become available or more cost-effective. An assessment of the social desirability of a soil carbon sequestration policy requires the consideration of all associated social costs and benefits. Measures to re-accumulate carbon in soils have ancillary or co-effects on the environment that can be beneficial or detrimental to social welfare and few of which are traded in markets. This paper discusses issues related to the development of soil carbon sequestration policies into agri-environmental schemes and reports findings from an application of a choice experiment to elicit preferences and estimate benefits of a soil carbon programme in Scotland under consideration of co-effects on biodiversity and rural viability. Preferences for soil carbon based mitigation are found to be heterogeneous and related to beliefs about climate change and attitudes towards its mitigation. Benefit estimates suggest that including co-effects can significantly change the outcome of cost-benefit tests. Implications for the development of climate change policies are discussed. © 2010 Springer Science+Business Media B.V.

Glenk K.,Macaulay Institute | Colombo S.,Centro Camino Of Purchil
Journal of Agricultural Economics | Year: 2011

The economic valuation of benefits resulting from environmental policies and interventions often assumes that environmental outcomes are certain. In fact, these outcomes are typically uncertain. This article proposes a methodological approach to incorporate delivery uncertainty into benefit estimation based on stated preference methods. In the study design of a choice experiment survey on land-based climate change mitigation, we explicitly include delivery uncertainty as the risk that a proposed mitigation project fails to deliver emission savings. We find that respondents' preferences do not change significantly after being confronted with choices that included risk of failure. However, failure risk itself does have an important impact on the preferences for delivering emission reductions. We show that delivery uncertainty can have a large impact on stated preference estimation of benefits of public programmes. This result should condition conclusions drawn from ex-ante environmental cost-benefit analyses that make use of such benefit estimates. © 2010 Blackwell Publishing Ltd.

Talavera M.,Centro Camino Of Purchil | Sayadi S.,Centro Camino Of Purchil | Chirosa-Rios M.,Centro Camino Of Purchil | Salmeron T.,Centro Camino Of Purchil | And 2 more authors.
Nematology | Year: 2012

With a surface area of 37 000 ha and an annual yield of 3 × 10 6 t, the south-east of Spain, predominantly the coast of Almeria, is the largest horticultural growing area under protected cultivation in Europe. A survey on perception of the impactof rootknot nematodes on vegetable production was carried out in this area by face-to-face interviews with 120 farm advisors. The survey was designed to evaluate opinions about prevalence and severity of root-knot nematode-induced diseases, percentage of infested area and effectiveness of root-knot nematode control methods. According to the answers, 17.7% of the fields were infested with root-knot nematode and 18.8% of the cultivable area within each site showed root-knot nematode disease symptoms, which came to 2.0%of the total area used to grow vegetables in the region. Average yield loss was estimated at about 30.8% of total vegetable production, and 38.1% of the farm advisors considered that root-knot nematode infections had increased over the last 5 years. Most farm advisors (78.3%) stated that the most commonly used control method was chemical soil fumigation. Non-fumigant nematicides were cited by 59.8% of them, grafting and resistant cultivars by 42.3%, soil solarisation 38.1%, plant extracts 14.4% and biofumigation 6.2%. The majority of farm advisors considered the application of fumigant nematicides combined with soil solarisation, and grafting onto resistant rootstocks as the most effective methods of root-knot nematode control. In addition to the interviews, plant and soilsamples were taken from plastic greenhouses throughout the region to determine species of root-knot nematode present. Meloidogyne javanica was the most prevalent species followed by M. incognita and M. arenaria, but species distribution was linked to the predominating crop sequence in each area, since M. javanica occurred less frequently when sweet pepper rather than tomato appeared in the crop sequence. Copyright © Koninklijke Brill NV, Leiden, 2012.

Glenk K.,Land economics and Environment Group | Colombo S.,Centro Camino Of Purchil
Australian Journal of Agricultural and Resource Economics | Year: 2013

In this study, we introduce information on outcome-related risk as an additional attribute in a choice model of preferences for a land-based climate change mitigation project. We provide a comprehensive comparison of different model specifications arising from different behavioural assumptions about the way that respondents process information on outcome-related risk within the choice task. We find significant differences between several specifications in terms of both model fit and WTP estimates. The behavioural assumptions made when choosing a particular model specification, and reasons that motivate them should be made explicit, and consequences of using different specifications should not be ignored. © 2013 Australian Agricultural and Resource Economics Society Inc. and Wiley Publishing Asia Pty Ltd.

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