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Copyright of Revista Cubana de Ciencias Forestales is the property of Universidad de Pinar del Rio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Avances is the property of Instituto de Informacion Cientifica y Tecnologica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mendive - Revista de Educacion is the property of Universidad de Pinar del Rio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Avances is the property of Instituto de Informacion Cientifica y Tecnologica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Avances is the property of Instituto de Informacion Cientifica y Tecnologica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

According to the Theory of the Total Economic Value of the Ecosystem, the techniques of economic-environmental valuation allow us to identify the main environmental functions that are directly or indirectly reflected in the market, which makes them one of the most widely used techniques for the economic valuation of the environment. This research was carried out with the aim of estimating the environmental costs and benefits generated in a dairy agro-ecosystem and with the application of economic -environmental valuation methods. To this end, the general functions of support or load, joint production, habitat and regulation at the end of 2018 were studied, applying the dialectical-materialistic method, as the guiding method of the research, in addition to empirical methods based on scientific observation and documentary analysis and the measurement method to describe and analyze the behavior of the functions studied. For the economic-environmental valuation analyses, items such as gross benefit, direct costs and avoided costs were calculated. It was found that the goods and services existing in the dairy ecosystem contribute to the total economic value a very favorable economic benefit, which is supported by a correct management of them, standing out in the contributions made by the functions of joint production, support or load and habitat. The integral analysis of the functions that make up the total economic value of any livestock ecosystem offers the possibility of deepening its efficient management and what this activity contributes in a sustainable manner in Cuba. [ABSTRACT FROM AUTHOR]

The process of knowledge management poses great challenges, including identifying, acquiring, developing, sharing, using and retaining knowledge relevant to local development in each region. The research aimed at designing a knowledge management strategy for the Local Agro livestock Innovation System in the province of Pinar del Río. This was developed through non-experimental transectional-descriptive research, which was structured in four stages that were defined in the diagnosis of the knowledge management process in the Local Agro livestock Innovation System, the analysis of the SWOT Matrix, the structuring of the strategy and finally the validation of the strategy proposal by the Delphi method. The result of the weighting of the SWOT Matrix showed that the process of knowledge management in the Local Agro livestock Innovation System was found in the quadrant of reorientation, with an adaptive position. This result indicated that the conditions for the proposal of the strategy were (Mini-Maxi)- (Weaknesses-Opportunities), in which actions were designed to reduce the limitations of the weaknesses, in the maximum use of the opportunities that have been identified in the process of knowledge management in the Local Agro livestock Innovation System. [ABSTRACT FROM AUTHOR]

Copyright of Avances is the property of Instituto de Informacion Cientifica y Tecnologica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The tobacco constitutes an important source of income to the Pinar del Río province. However, production technologies have contributed to the degradation of soils; crop alternating is one of the effective measures to mitigate this effect. The objective of the investigation was to evaluate the incidence of different variants of alternation in some chemical and physic - chemical properties of the soil. The work was developed in areas dedicated to the tobacco crop, the variants of alternation evaluated were uncultivated soil, tobacco - fallow, tobacco - corn and tobacco - polycultures. In the selected areas, 96 samples were collected at depths of 20 cm and 40 cm and 40 producers were surveyed. Descriptive statistical methods were applied to compare the means in each variant of land use. The results showed that the predominant pH was slightly acidic, the tobacco-fallow variant showed values close to neutrality. The content of organic matter did not exceed 1% in the variants of cultivated soils inferior to those not cultivated, changeable bases and cation exchange capacity were similar in the cultivated soils, and the calcium showed the highest values in tobacco-fallow. It is concluded that the different land use variants did not have a marked effect on the pH values. The content of soluble phosphorus increased in all the variants of cultivated soils. The alternation of crops, as the only measure of improvement, does not guarantee an improvement in the chemical and physic - chemical properties of the soils. [ABSTRACT FROM AUTHOR]