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La mayor exposición a los riesgos físicos del cambio climático de los trabajadores al aire libre, unida a su mayor vulnerabilidad social, aconseja una revisión de la protección que les otorga la normativa vigente, especialmente en materia de contratación laboral y prevención de riesgos laborales. La propuesta de mejoras en la materia exige considerar, no obstante, las singularidades de sectores como el agrario o el de la construcción y pasa, necesariamente, por un análisis técnico-jurídico de la normativa aplicable y sus últimas reformas.

Este artículo pretende propiciar la reflexión sobre las reformas agrarias implementadas en Colombia y la actual propuesta sobre una Reforma Rural Integral (RRI) concertada en el marco de los acuerdos de paz que sostiene actualmente el gobierno y las FARC en la Habana. Este documento brinda al lector, la posibilidad de reflexionar sobre los antecedentes históricos, conceptos, los resultados y las discusiones en torno a los problemas acuciantes de la estructura agraria del país. Se reflexiona acerca de los planes que se promueven actualmente con la propuesta de la RRI, mediante un análisis comparativo, tendiente a sentar las diferencias y similitudes con las reformas agrarias implementadas anteriormente. Finalmente, se presenta algunas opiniones sobre los temas que no se incluyen en la agenda individual de la propuesta, que son de obligatoria discusión para que se promueva un desarrollo del sector agrario.

El análisis correcto de los datos procedentes de un experimento suele constituir una de las asignaturas pendientes de los profesionales dedicados a la agronomía, y no solo en el ámbito de la investigación, pues pocos profesionales conresponsabilidades en la producción agrícola realizan procedimientos estadísticos sencillos para determinar si una nueva técnica, variedad o producto mejorao no lo habitual. El valor de la experiencia para juzgar la bondad de nuevastécnicas o las ventajas de un nuevo material suele ante ponerse al rigor de unanálisis matemático, en muchas ocasiones por falta de pericia en el manejo deestos métodos. Aún cuando hay buenos libros que tratan de esta materia, son muchos los trabajos que se realizan con un planteamiento experimental y un tratamiento de los datos dudosos, y esta situación es muy evidente cuando se evalúan Tesis Doctorales o artículos científicos. Experimentación Agraria trata dealiviar las dificultades que investigadores, técnicos y estudiantes tienen sobre esta materia, describiendo de una forma sencilla y práctica los métodos máscomunes utilizados en los trabajos agronómicos, sin grandes exigencias en conocimientos matemáticos. El texto incluye también aspectos de la experimentación agrícola que escapan del ámbito matemático, como los relativos a la definición de los objetivos, la selección de los tratamientos, la toma de datos en campo o la interpretación y presentación correcta de los resultados. Se incluye también un glosario de términos que resulta de utilidad para los menos familiarizados con esta materia. En resumen, se trata de una publicación que debería formar parte de la biblioteca de estudiantes y profesionales de la agricultura.

Political Agroecology is the first book to offer a systematic and articulated reflection on Political Agroecology from the Agroecological perspective. It defines the disciplinary field responsible for designing and producing actions, institutions and regulations aimed at achieving agrarian sustainability. In short, it aims to build a political theory that makes the scaling-up of agroecological experiences possible, turning them into the foundation of a new and alternative food regime. The book proposes theoretical, practical and epistemological foundations of a new theoretical and practical field of work for agroecologists: Political Agroecology . It establishes a framework for a common agroecological strategy, covering the different levels of collective action and the different instruments with which it can be developed. This will be essential reading for agroecologists, environmentalists, farming and food communities, and an ideal textbook for advanced agroecology courses in universities. Key features: Offers a unique state of the art on this fundamental new topic: Political Agroecology Presents a complete introduction to the political and institutional aspects of Agroecology, covering the whole food system Offers an important tool for searching agrarian sustainability Provides a broad epistemological, theoretical and methodological focus, exploring the connection between the different levels and scales involved in agroecological theory and practice 　 Manuel González de Molina Full Professor of Modern History. Coordinator of the Agro-Ecosystems History Laboratory (Universidad Pablo de Olavide, Seville, Spain). Co-director of Master Degree Program on Agro-ecology at International University of Andalusia from 1996 to now. Paulo Federico Petersen Doctorate in Environmental Studies from Pablo de Olavide University (Spain), Master in Agroecology and Rural Development from the Universidad Internacional de Andalucía (Spain), Graduated in Agronomy from the Federal University of Viçosa (Brazil). Executive coordinator of the NGO AS-PTA - Family Agriculture and Agroecology, vice-president of ABA-Agroecology (Brazilian Association of Agroecology) and editor-in-chief of \"Agriculturas: experiencias em agroecologia\" magazine. Francisco Garrido Peña PhD in Philosophy of Law (Universidad de Granada) and full professor on Politics and Law at Universidad de Jaén (Spain). His research activity is focused on Political Ecology, Ethics and Institutional Design. Francisco Roberto Caporal: PhD in Agroecology, Peasantry and History, from the Institute of Sociology and Peasant Studies (Córdoba University, Spain). Master in Rural Extension by Federal University of Santa Maria (1991) and graduate in Agronomy, Federal University of Santa Maria (1975). Currently, he works as Associate Professor of the Federal Rural University of Pernambuco, in the Department of Education, teaching in Rural Extension. Introduction. 1.Theoretical foundations of Political Agroecology 2.The industrialization of agriculture and the enlargement of the food chain 3. A regime on the road to collapse 4. Cognitive frameworks and institutional design for an agroecological transition 5.Scaling Agroecology 6. The agents of the agroecological transition 7. The role of the State and public policies 8.References

This study was carried out to examine the causal relationship between interest rate policy and agricultural production in a deregulated economic setting in Nigeria using time series data covering 1987 to 2011. The data utilized include data on interest rate and agricultural production which were obtained from various publications of central bank of Nigeria. Augmented Dickey Fuller (ADF) test, Vector autoregression (VAR) lag order selection test and Granger causality test were employed in the data analysis and the result indicated that market driven interest rate was not significant in influencing agricultural production over the period of deregulation and this was attributed to the substantial volatility and high market driven interest rate leading to limited accessibility to credit facilities by small scale farmers. It is recommended that the central bank of Nigeria should strongly exercise some measure of interest rate control that favours investment friendly interest rate policy that is supportive of credit mobilization for sustainable agricultural production and also the realization of the goal of Agricultural Transformation Action Plan (ATAP) in Nigeria.

This paper deals with the valuation of the biological assets and agricultural production. Czech and international approaches are analyzed. The International Accounting Standards offer more authentic valuations of economic processes in agricultural activities than the Czech accounting legislation. The comparison of the two approaches show some differences which can influence the financial statements of enterprises. The International Accounting Standards emphasize the principle of fair and true view, whereas the Czech accounting emphasizes the principle of prudence.

The following international comparison of selected indicators of farms stems from the official results of investigations on holdings incorporated in the Farm Accountancy Data Network (FADN). It is based on the standard outputs recalculated for the average agricultural holding in each member state. The paper accepts the mandatory concept that defines the basic indicators serving to illustrate the creation and division of income from farming in the FADN system. The presentation of the results develops from the indicators assessing the overall agricultural production divided into its basic components. Production and cost indicators, operational subsidies, gross and net added value per one hectare of agricultural land, or per one AWU and other derived indicators are analysed.

Timmer discusses how building a more realistic paradigm of farm decision making has been driven partly by the irrelevance of two specific paradigms and by the sheer intellectual challenge of the task. A workable political economy paradigm is going to be needed to carry out more research.