[en] In this PhD Thesis it is developed an integrated methodological framework in order to assess the multifunctional performance of farming systems and define farming techniques more sustainable economic, environmental and socially, and designing agricultural policies that promote the adoption of optimal farming techniques. For this purpose, different methodologies for economic valuation, integrated modeling, stakeholder analysis, and multi-criteria evaluation are combined. The methodological framework is developed and applied to two case studies, the olive groves of Andalusia and intensive dairy farms in the north of the Netherlands, which are agricultural systems of high economic, social and environmental significance in their respective regions. The underlying hypothesis in the thesis, which has been proven, is that the most sustainable agricultural techniques globally are not being implemented by farmers currently, in both agricultural systems, because they are not adequately considered in the design of agricultural and agro-environmental public policies the public and private benefits and costs of all stakeholders and all market and non-market functions of agricultural systems at farm and / or landscape level. Thus, the ultimate goals of the research are: 1) prioritize the non-market functions of the two analysed farming systems according to societal demands to agriculture; 2) identify optimal farming techniques and technology packages according to their multifunctional performance and global sustainability at farm and / or landscape level and define the needed changes in current farming techniques to achieve higher levels of sustainability; and 3) define efficient political mechanisms to promote effective change in the techniques implemented by farmers in order to achieve the adoption of farming techniques or technological packages of greater global sustainability in both farming systems.

[es] En la presente Tesis Doctoral se desarrolla un marco metodol&oacute;gico integrado con el fin de evaluar el comportamiento multifuncional de los sistemas agrarios y definir pr&aacute;cticas agrarias m&aacute;s sostenibles econ&oacute;mica, ambiental y socialmente, y dise&ntilde;ar pol&iacute;ticas agrarias que favorezcan la adopci&oacute;n de las t&eacute;cnicas agrarias &oacute;ptimas desde el punto de vista de su sostenibilidad global. Para ello se combinan diferentes metodolog&iacute;as de valoraci&oacute;n econ&oacute;mica, modelizaci&oacute;n integrada, el an&aacute;lisis de las partes interesadas y la evaluaci&oacute;n multicriterio. El marco metodol&oacute;gico se desarrollar&aacute; y aplicar&aacute; para dos casos de estudio, el olivar de Andaluc&iacute;a y explotaciones lecheras intensivas del norte de los Pa&iacute;ses Bajos, sistemas de elevada significaci&oacute;n econ&oacute;mica, social y ambiental en sus respectivas regiones. La hip&oacute;tesis subyacente en la Tesis, y que ha sido contrastada, es que en la actualidad no se est&aacute;n implementando por parte de los agricultores, en ambos sistemas agrarios, las t&eacute;cnicas agrarias m&aacute;s sostenibles globalmente debido a que no se est&aacute;n considerando adecuadamente en el dise&ntilde;o de pol&iacute;ticas agrarias y agroambientales p&uacute;blicas los beneficios y costes p&uacute;blicos y privados de todas las partes interesadas y las funciones de mercado y no-mercado de los sistemas agrarios a nivel de explotaci&oacute;n y/o paisaje. As&iacute;, los objetivos &uacute;ltimos de la investigaci&oacute;n son: 1) priorizar las funciones de no-mercado, o no comerciales, de los dos sistemas agrarios analizados seg&uacute;n las demandas sociales a la agricultura; 2) identificar t&eacute;cnicas de cultivo y paquetes tecnol&oacute;gicos &oacute;ptimos de acuerdo con su comportamiento multifuncional y sostenibilidad global a nivel de explotaci&oacute;n y/o paisaje y definir los cambios necesarios en las t&eacute;cnicas agrarias actuales para alcanzar mayores niveles de sostenibilidad; y 3) definir mecanismos pol&iacute;ticos eficientes para promover un cambio efectivo en las t&eacute;cnicas implementadas por los agricultores con el fin de alcanzar la adopci&oacute;n de las t&eacute;cnicas o paquetes tecnol&oacute;gicos de mayor sostenibilidad global en los dos sistemas agrarios objeto de estudio.