IFAPA Institute of Agricultural Research and Training

Spain

IFAPA Institute of Agricultural Research and Training

Spain
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Diaz-Hernandez J.L.,IFAPA Institute of Agricultural Research and Training | Yepes J.,University of Las Palmas de Gran Canaria | Romero-Diaz A.,University of Murcia | Martin-Ramos J.D.,University of Granada
Catena | Year: 2015

Slips are little known mud-coated structures several centimeters thick, produced by gravity-driven flows on free vertical surfaces. We have differentiated a sequence formed by three main morphologies: mud drips, slips and pseudo-stalactites. This study, located in the badlands of the Guadix and Baza basins (SE Spain), suggests that formation of muddy morphologies on subvertical walls is determined by the physico-chemical characteristics of colloidal suspensions (slurries) related to rainy periods and does not indicate any substrate decay. Multiple braided microchannels, internally structured like irregular book pages, are commonly found, each formed by mudflows during rainy episodes. These morphologies constitute a temporary sink of fine erosive materials. They consist of scarcely sorted mixtures of heterogeneous matter of a detrital-cohesive nature, with low clay contents, which inherit the features of the parent materials. The current semiarid environmental conditions appear to favor conservation rather than development. The differences observed in the slips of the Guadix and Baza basins can be determined by the different geomorphological evolution of the two basins and, to a lesser extent, by the properties of the slurries that fed the slips. © 2015 Elsevier B.V.


Rodriguez-Entrena M.,IFAPA Institute of Agricultural Research and Training | Arriaza M.,IFAPA Institute of Agricultural Research and Training | Gomez-Limon J.A.,University of Cordoba, Spain
Agroecology and Sustainable Food Systems | Year: 2014

The negative externalities associated with erosion significantly damage agroecosystems. This article intends to identify the main factors that affect the adoption of cover crops under mower control (CCMC) in olive groves in Andalusia (Spain) using variance structural equation modeling (SEM) by partial least squares (PLS). The results show that olive orchard profitability, olive grower adaptation, prior adoption of soil conservation practices, and social capital determine the adoption of the aforementioned technique. Similarly, this article also sheds light on the moderating role played by olive grove size, strengthening the relationship between profitability and adoption for large-scale farms and membership of farmers' organizations and adoption for small-scale ones. © 2014 Taylor & Francis Group, LLC.


Villanueva A.J.,IFAPA Institute of Agricultural Research and Training | Gomez-Limon J.A.,University of Cordoba, Spain | Arriaza M.,IFAPA Institute of Agricultural Research and Training | Rodriguez-Entrena M.,IFAPA Institute of Agricultural Research and Training
Land Use Policy | Year: 2015

Agri-environmental schemes (AES) play a key role in promoting the production of environmental public goods by European Union agriculture. Although extensive literature has analyzed AES, some important issues remain understudied. This paper performs an ex-ante assessment of AES in permanent cropping, analyzing several issues that have received little attention from researchers, such as ecological focus areas (EFA) and collective participation. For this purpose, a choice experiment was used to assess farmers' preferences toward AES in a case study of olive groves in southern Spain. Results show high heterogeneity among farmers, with different classes being identified, from potential participants to non-participants. As regards EFA, almost half of the farmers would be willing to accept it up to 2% for low monetary incentives (€8-9/ha per additional 1% of the farmland devoted to EFA) while the rest would do it for moderate-to-high monetary incentives (€41-151/ha per additional 1% of EFA). However, for a high share of EFA (e.g., 5-7%) higher incentives would presumably be required due to the intrinsic spatial restrictions of olive groves. With regard to collective participation, we find that it is unlikely that farmers would participate collectively with the incentive of the up to 30% EU-wide bonus. These results are relevant for policy-making now when new AES are being designed for the next programming period 2014-2020. © 2015 Elsevier Ltd.


Rodriguez-Entrena M.,IFAPA Institute of Agricultural Research and Training | Espinosa-Goded M.,European Commission | Barreiro-Hurle J.,Food and Agriculture Organization of the United Nations
Ecological Economics | Year: 2014

Agriculture is a key sector for climate change mitigation strategies due to its CO2 sequestration potential. However, in order to increase mitigation changes in current crop and land management are required, which in many cases imply additional costs to farmers. Thus, this research assesses society's willingness to pay using a discrete choice analysis for a soil management programme in Andalusian olive groves identifying different groups based on preference heterogeneity. We identify three groups and characterise them on the basis of socio-demographics. Willingness to pay is higher in areas and for individuals who would directly benefit from the programme. Additionally, the ancillary benefits associated to carbon sequestration capture an important share of the overall benefits. Our results show that soil carbon sequestration in olive groves provides net social value and can be a cheap and cost-effective way of combating climate change. © 2014 Elsevier B.V.

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