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Showing items 1 through 9 of 46.
  1. Library Resource
    Journal Articles & Books
    December, 2016
    Brazil, Argentina

    A new species of land planarians of the genus Cratera is described. Cratera viridimaculata sp. n. was recorded in the Atlantic Forest Ecoregion, in north-eastern Argentina, and represents the first report of the genus Cratera outside Brazil. The new species is about 50 mm in length and externally characterized by a color pattern consisting of a light green olive pigmentation on the dorsum, stippled with dark gray fine spots, and dorsal eyes.

  2. Library Resource
    Conference Papers & Reports
    December, 2007
    Honduras, Paraguay, Bolivia, Argentina, Costa Rica, Brazil, Central America, South America, Caribbean

    Rising oil prices has led to increased interest to replace domestic demand for liquid fuels for transport (petrol and diesel) with biofuel production (ethanol and biodiesel). One of the pioneers in biofuel production is Brazil, which since the 1970s has established a government program that promotes the production and consumption of ethanol. Currently, Brazil is the leading producer of ethanol in the world and has started also programs for biodiesel production based on soybeans, oil palm and other crops.

  3. Library Resource
    Policy Papers & Briefs
    December, 2006

    Frequently, agriculture intensification by means of high-input technologies and agroecosystem simplification led to unsustainable farming systems. Increasing spatial-temporal diversity in agroecosystems has been shown as a promising alternative for restoring degraded land. A methodological approach is discussed here, based on preliminary results of experiences in a region of strong biophysical gradients. The CENTURY model is validated under local conditions and used as monitoring tool.

  4. Library Resource
    Journal Articles & Books
    December, 2012
    Chile, Argentina

    Notwithstanding the increasing cattle activity on the South American temperate forests, its impacts on the forests regeneration are yet poorly understood. We investigated the influence of cattle on the regeneration of monkey puzzle tree (Araucaria), an endangered conifer of the temperate forests of Chile and Argentina, on properties of small landowners and of timber companies. In thirty-six 100×20m plots, we recorded the number of seedlings and saplings from seeds and resprouts, the number of cattle dung pats and the density of parent trees.

  5. Library Resource
    Policy Papers & Briefs
    December, 2002
    Brazil, United States of America, Argentina

    We develop a new partial equilibrium, four-region world trade model for the soybean complex comprising soybeans, soybean oil, and soybean meal. In the model, some consumers view genetically modified Roundup Ready (RR) soybeans and products as weakly inferior to conventional ones; the RR seed is patented and sold worldwide by a U.S. firm; and producers employ a costly segregation technology to separate conventional and biotech products in the supply chain.

  6. Library Resource
    Journal Articles & Books
    December, 2004
    India, Brazil, China, Argentina

    There are two mechanisms by which modern genetically modified organism (GMO) products can affect productivity in developing countries. The first is the Genes for Rent mechanism where a recipient country agrees with a GMO company to incorporate a GMO product (e.g., a Bt gene in cotton varieties) and pay a technology fee. The second is the Transgenic Breeding mechanism in which National Agricultural Research System (NARS) breeders use modern biotech methods marker-aided breeding, genetic maps, and genomics research to produce GMO traits of economic value in crop varieties.

  7. Library Resource
    Journal Articles & Books
    December, 2008

    In South Patagonia, Argentina, sweet cherry is the main fruit-tree crop grown for export, resulting in a highly seasonal labour demand. Managers of deciduous perennial fruit orchards must consider both biological and economic relationships in selecting crop species and orchard design. This makes decisions at the farm-level extremely complex, as especially in such perennial crops, strategic ('what to plant', 'with which technology' and 'how much area of each activity', i.e.

  8. Library Resource
    Journal Articles & Books
    December, 2014

    This study gives an account of the implementation of a decision support system as a logical framework for assessing lake pollution hazard. The use of this system is demonstrated with an example from two lake watersheds, each one with different land-use, soil and topographic characteristics and also management regulations for natural resource protection. Lake pollution hazard is assessed as a function of two primary topics: hydrologic and soil conditions.

  9. Library Resource
    Journal Articles & Books
    December, 2003

    Since the early 1990s, Argentinean grain production underwent a dramatic increase in grains production (from 26 million tons in 1988/89 to over 75 million tons in 2002/2003). Several factors contributed to this "revolution," but probably one of the most important was the introduction of new genetic modification (GM) technologies, specifically herbicide-tolerant soybeans.

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