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The present work was carried out in the Institute of Animal Science (ICA), located in San José de las Lajas, Havana county; in the development livestock unit (block), with the objective of determining the energetic, productive, and environmental contribution of the multi shovel windmills as an alternative source of water supply. To determinate the wind speed characteristics, available eolic power, power transmission efficiency and non-emitted contamination magnitude by the use of low speed multi shovel windmill. It was used the Danish Association of Eolic Industry methodologics. It was obtained a safe of 5 882,9 liters/year (4 929 kg/year) of fuel by the substitution of pumping electricity and water transportation by a water tanker, it was avoided the emission of 17,27 t/year of atmosphere pollutants. It was obtained an economic gain of 5882.94 peso/year and the investment will be recovered in 1,7 years. [ABSTRACT FROM AUTHOR]

For the necessity of going achieving in the country, supportably levels in the agriculture that assures the conservation and efficiency in the use of the available resources, are projected a study of the energy sources that used in the technologies of soil tillage for mountain conditions, with the objective of evaluating the use of the animals force during the tillage tools traction, constituting this a renewable, technically acceptable, economically viable and socially desirable energy alternative. The pilot idea begins its development in the environment of the Mountain Faculty of Agronomy of San Andres, of the University of Pinar del Rio, embracing San Andrés' valley with its forms and characteristic production sectors and being projected to the generalization in the mountainous areas of the agriculture. For the study a threefactorial experiment was designed where parameters like the work speed were evaluated, traction resistance and fatigue degree or fatigue of the animals. In a general way it was possible to demonstrate for the mountain conditions of San Andres, the elements that determine the correct formation of the groups for the plow labour, guaranteeing their energy efficiency, environment conservation and economic feasibility. In a general way with this work demonstrate the necessity to reorient the formation of groups during the use of the animal energy in the mountain agriculture. [ABSTRACT FROM AUTHOR]