833 resultados para Natural Resource Ecology and Management


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Indigenous firms in Mexico, as in most developing countries, take the shape of family businesses. Regardless of size, the most predominant ones are those owned and managed by one or more families or descendent families of the founders. From the point of view of economics and business administration, family business is considered to have variety of limitations when it seeks to grow. One of the serious limitations is concerning human resource, which is revealed at the time of management succession. Big family businesses in Mexico deal with human resource limitations adopting measures such as the education and training of the successors, the establishment of management structure that makes control by the owner family possible and divisions of roles among the owner family members, and between the owner family members and the salaried managers. Institutionalization is a strategy that considerable number of family businesses have adopted in order to undergo the succession process without committing serious errors. Institutionalization is observed in such aspects as the establishment of the requisite condition to be met by the candidate of future successor and the screening by an institution which is independent of the owner family. At present these measures allow for the continuation of family businesses in an extremely competitive environment.

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Mode of access: Internet.

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Mode of access: Internet.

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"February 1983."

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The BioCentury Research Farm (BCRF) had a diversity of users in 2011. Iowa State faculty and staff from agricultural and biosystems engineering (ABE), agricultural systems technology (AST), agronomy, chemical and biological engineering (CBE), civil, construction, and environmental engineering (CCEE), food science and human nutrition (FSHN), horticulture, mechanical engineering (ME), and natural resource ecology and management (NREM) conducted research, teaching, and outreach at the BCRF. Private industry users included Avello Bioenergy, DCE, Frontline BioEnergy, and Virent, Inc.

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Many landowners ask about the process and costs for returning land to crop production after trees are cut for biomass. A field on the Squaw Creek bottom, Story County, Iowa was planted to hybrid poplar trees in spring 2000. The trees were planted in rows with a 10-ft spacing. The trees were cut in spring 2010. The resulting field was four acres, and this is the account of the first corn crop in 2011 on the area.

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A substantial need exists to reduce costs and develop more nutritionally adequate diets for established as well as emerging aquaculture species in the North Central Region (NCR). The study evaluated a diet for juvenile northern bluegill (Lepomis macrochirus) that is significantly less costly than currently available diets for sunfish, while yielding a growth rate that is at least equal to an industry standard sunfish diet. Such a diet formulation is now available to the NCR as the result of a recently funded North Central Regional Aquaculture Center (NCRAC) project.

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El estudio de los factores que rigen los patrones espaciales de la distribución del pastoreo de los herbívoros domésticos es fundamental en la ecología y el manejo de los recursos naturales. Aunque los productores y profesionales realizan ajustes anuales o estacionales de la carga animal para influir en la preferencia animal por determinados ambientes de pastoreo y alcanzar un uso eficiente del recurso forrajero, el manejo de la distribución del ganado continúa siendo un gran desafío. La heterogeneidad de los ambientes de pastoreo tiene dimensión tanto espacial como temporal, lo cual impone desafíos en el entendimiento de los factores que influyen en las decisiones de selección de hábitat por parte del ganado. En esta contribución comenzamos revisando los modelos conceptuales actuales del comportamiento del ganado a grandes escalas. Luego, presentamos algunos resultados de estudios conducidos en diferentes ecosistemas contrastantes de Argentina y New Mexico (EEUU). Estos estudios desarrollados usando animales con y sin collares GPS contribuyen a mejorar gradualmente las decisiones de manejo de los pastizales. Finalmente, hacemos unas consideraciones breves relacionadas con el manejo del ganado en Ecuador que pueden contribuir a mejorar la sustentabilidad de los sistemas de producción ganaderos.

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Sustainable natural resource use requires that multiple actors reassess their situation in a systemic perspective. This can be conceptualised as a social learning process between actors from rural communities and the experts from outside organisations. A specifically designed workshop oriented towards a systemic view of natural resource use and the enhancement of mutual learning between local and external actors, provided the background for evaluating the potentials and constraints of intensified social learning processes. Case studies in rural communities in India, Bolivia, Peru and Mali showed that changes in the narratives of the participants of the workshop followed a similar temporal sequence relatively independently from their specific contexts. Social learning processes were found to be more likely to be successful if they 1) opened new space for communicative action, allowing for an intersubjective re-definition of the present situation, 2) contributed to rebalance the relationships between social capital and social, emotional and cognitive competencies within and between local and external actors.

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How do resource booms affect human capital accumulation? We exploit time and spatial variation generated by the commodity boom across local governments in Peru to measure the effect of natural resources on human capital formation. We explore the effect of both mining production and tax revenues on test scores, finding a substantial and statistically significant effect for the latter. Transfers to local governments from mining tax revenues are linked to an increase in math test scores of around 0.23 standard deviations. We find that the hiring of permanent teachers as well as the increases in parental employment and improvements in health outcomes of adults and children are plausible mechanisms for such large effect on learning. These findings suggest that redistributive policies could facilitate the accumulation of human capital in resource abundant developing countries as a way to avoid the natural resources curse.