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Mostrando ítems 1 a 9 de 49.
  1. Library Resource

    Land Use Policy Volume 77

    Publicación revisada por pares
    Septiembre, 2018
    Colombia

    Colombia’s Andean-Amazonian foothills are among the most pressing deforestation hotspots in the country. Yet, the relationships and dependencies of underlying deforestation drivers are not well understood. For an adequate territorial reorganization in the post-conflict era that is sensitive to local context, a targeted analysis of the present situation at the local level is required. This study investigates direct and indirect deforestation drivers, relationships among these and potential measures to lower deforestation post-conflict.

  2. Library Resource

    Land Use Policy Volume 99

    Publicación revisada por pares
    Diciembre, 2020
    Colombia, América del Sur, América central

    Much of the research on urbanization has focused on how rural populations move to cities for work opportunities. This paper takes a different perspective on the relations between rural populations and urbanization. The livelihoods of rural dwellers on the outskirts of the city of Bogotá in Colombia are increasingly affected by the expansion of urban activities and infrastructure. Therefore, urbanization takes place in the areas of residence of the rural populations; these people do not migrate to the city but, rather, the city migrates to them.

  3. Library Resource

    Volume 9 Issue 12

    Publicación revisada por pares
    Diciembre, 2020
    Brasil, Chile, Colombia, México, Perú, Filipinas, América del Sur, América central

    The urban planning ideas proposed by Jane Jacobs in the 1960s remain relevant to this day, promoting a perspective on the relationship between urban morphology and the community that takes into consideration the experiences of the people themselves in the planning of cities. With Jacobs’ ideas in mind, this article seeks to explore the urban territory of Santiago, Chile, and to assess the vitality of its neighborhoods with their diversity of morphological, architectural, and spatial characteristics.

  4. Library Resource

    Volume 9 Issue 9

    Publicación revisada por pares
    Septiembre, 2020
    Brasil, Colombia, España, Italia, México, Noruega, Puerto Rico, Portugal, Estados Unidos de América, Venezuela

    Since the middle of the 20th century, irrigation in the southeast of Spain has displayed significant productive growth based on the intensive use of the scarce water resources in the area and the contribution of river flows from the hydrographic basin of the Tagus River to the hydrographic basin of the Segura River. Despite high levels of efficiency in the water use from the new irrigation systems, the water deficit has only intensified in recent years.

  5. Library Resource

    Volume 9 Issue 8

    Publicación revisada por pares
    Agosto, 2020
    Colombia, España, Estados Unidos de América

    Cultural ecosystem services are gaining increasing attention in the scientific literature, despite the conceptual and methodological difficulties associated with their assessment. We used a participatory GIS method to map and assess three cultural ecosystem services, namely, (a) outdoor recreation, (b) aesthetic enjoyment, and (c) sense of place, in the Madrid region (Spain). The main goal of the study was to identify cultural ecosystem service hotspots in the region and to explore the relationships among the three ecosystem services mapped.

  6. Library Resource

    Volume 8 Issue 8

    Publicación revisada por pares
    Agosto, 2019
    Colombia

    In Colombia, right-wing leadership returned to power after winning the presidential elections in 2018 in a campaign in which they opposed the previous government, primarily because of the negotiations and peacemaking with the FARC-EP (Fuerzas Armadas Revolucionarias de Colombia—Ejército del Pueblo ‘Armed Revolutionary Forces of Colombia—People’s Army’), Colombia’s largest guerrilla organization.

  7. Library Resource
    Artículos de revistas y libros
    Diciembre, 1985
    Colombia, América central, América del Sur

    The factors influencing the size and shape of exptl. field plots (area of exptl. lot, soil types, trial objective, no. of replicates, and degree of accuracy and homogeneity of the exptl. material) for the execution of field expt. are discussed. The basic principles of the following different methods to determine plot size are described: max. curve method, method of Koch and Rigney, Hatheway's method, and the max. curve method using the multiple linear regression model. Some considerations are presented on the border effect and on plot size in bush and climbing bean trials.

  8. Library Resource
    Artículos de revistas y libros
    Diciembre, 1979
    Colombia, América central, América del Sur

    Some cultural control measures of weeds in cassava are discussed: quality of the material, planting system and density, density x plant type interaction and use of mulching. In order to study the interaction plant type x planting density, var. M Mex 59 (vigorous) and M Col 22 (nonvigorous) were planted in plots of 7500 and 15,000 plants/ha; and 3 levels of weed control were established: complete, intermediate and no control. The vigorous var.

  9. Library Resource
    Artículos de revistas y libros
    Diciembre, 1980
    Colombia, América central, América del Sur

    Efforts to develop cassava technology for the vast areas of acid infertile soils were continued Large-scale germplasm screening in the field was begun in Carimagua for tolerance to low levels of P and acidity and in Quilichao, for tolerance to low levels of P. Various fertilizer trials were used to determine: (a) nutrient absorption and distribution within the plant during a 12-mo.

  10. Library Resource
    Artículos de revistas y libros
    Diciembre, 1980
    Colombia, América central, América del Sur

    Research of the physiology section was centered on identifying the characters associated with high root yields and quality in cassava under stress conditions. Plant reaction to water stress was studied, specifically regarding growth and yields of var. M Mex 59 and M Col 22 with a period of artificial rain exclusion. Observations were made throughout the stress period and subsequent recovery. Water stress reduced LAI notably although M Mex 59 maintained a LAI approx. twice that of M Col 22 during the stress period. LAI for both var.

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