Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 45.
  1. Library Resource
    Articles et Livres
    décembre, 2005
    Espagne

    The SIAT is a specialist system for Land Evaluation derived from the MicroLEIS - Land Evaluation Information System developed in Spain. In its first version the 12 variables were adapted and adjusted for tropical conditions as well as the program structure and databank. In that time the field tests showed that the best results were obtained for scales near 1:100.000. In this second version the ranges for each variable were redefine and a communication interface with the GIS IDRISI was introduced, which allowed the exchange of data between the two programs.

  2. Library Resource
    Articles et Livres
    décembre, 2002
    Brésil

    This study evaluates the socioeconomic impacts of the 1997 Brazilian Program of Land Solidarity Reform on two rural communities in Ceará Brazil. To accomplish this, we contrasted job and income data collected from 1996, before the Programs inception, with similar data from 1998 and 1999. We also calculated a Human Development Index (Índice de Desenvolvimento Humano--HDI) and a Life Condition Index (Índice de Condição de Vida - ICV) for the two communities for the period between July 1998 and June 1999. Primary data were gathered by a survey applied to the sample communities.

  3. Library Resource
    Articles et Livres
    décembre, 2008

    This work analyzes the convergence of land productivity for Brazilian regions from 1991 to 2003. It evaluates if there is or not beta convergence of the agricultural productivity, controlling explicitly for spatial effects. To do so, an exploratory spatial data analysis was previously implemented and the presence of spatial autocorrelation for the land productivity was detected. In addition, spatial econometric models were developed for the convergence analysis.

  4. Library Resource
    Documents et rapports de conférence
    juillet, 2008

    O artigo se propõe a apresentar a discussão sobre a reforma agrária brasileira, no seu aspecto teórico e na análise do seu processo de execução. Verifica-se que, ao longo dos anos, através dos programas e projetos, faltou decisão política para realizar as transformações que a estrutura concentrada da terra está a exigir e melhorar as condições de vida das populações sem terra. A violência está presente no processo, fazendo um grande número de vítimas.

  5. Library Resource
    Articles et Livres
    décembre, 2016

    The objective of this study was to understand how the strategy of defoliation prior to deferred grazing modifies the structure of Brachiaria brizantha cv. marandu (marandu grass) at the beginning of deferment. The following three defoliation strategies wer e evaluated: 15/15 cm – canopy height of 15 cm in the three months prior to deferment
    30/15 cm – canopy height of 30 cm in the preceding three months and defoliation to 15 cm at the beginning of deferment

  6. Library Resource
    Documents et rapports de conférence
    juillet, 2008

    ESTE TRABALHO OBJETIVOU ANALISAR O PROCESSO DE OCUPAÇÃO E USO DO CERRADO PIAUIENSE, PARTICULARMENTE, DE PALMEIRA DO PIAUÍ RELATIVO À FORMAÇÃO E DINÂMICA DO MERCADO DE TERRAS. A OCUPAÇÃO DO CERRADO BRASILEIRO, DEU-SE EM 1950, DIFERENCIANDO-SE ENTRE AS UNIDADES DA FEDERAÇÃO, EM DECORRÊNCIA DAS ESPECIFICIDADES INSTITUCIONAL, POLÍTICA, ECONÔMICA E NATURAL. NO CERRADO PIAUIENSE, O PRÓPRIO ESTADO DISPONIBILIZOU VIA COMDEPI, TERRAS A PREÇOS INSIGNIFICANTES A GRANDES PRODUTORES RURAIS DO PAÍS. EM PALMEIRA DO PIAUÍ, A OCUPAÇÃO INICIOU A PARTIR DE 1996, CENTRANDO-SE NA PRODUÇÃO DE SOJA.

  7. Library Resource
    Articles et Livres
    décembre, 2001

    The forests on Barreiras formations are located in fragmented areas extending from the Rio Grande do Norte State to north of Rio de Janeiro State. In the north of Rio de Janeiro State, the "Mata do Carvão" (1053 ha) is the largest remaining fragment. This study describes the structure and floristic composition of a remnant forest on tertiary tabuleiros and its main aim was to compare this forest with other "tabuleiro" and Atlantic forest remnants in the region.

  8. Library Resource
    Articles et Livres
    décembre, 2005

    An understanding of changes in Amazonian landscapes depends on documentation about alterations in land cover. This article highlights the efforts of the Large Scale Biosphere-Atmosphere Experiment in Amazônia (LBA) related to the topic. In particular, a longitudinal study has analyzed the social and biophysical dimensions of land use/land cover, using a multi-scalar georeferenced approach. The study areas represent a gradient of soil fertility in Amazônia and include distinct landscape mosaics, from the Amazon estuary and the Bragantina region to northeastern Rondônia.

  9. Library Resource
    Articles et Livres
    décembre, 2002
    Brésil, Global

    TM/Landsat 5 images (TM1-TM5 and TM7 spectral bands) from Altamira PA, Brazil (07.20.1991) modified to 60, 100, 120, 200 and 250 m were utilized to evaluate the influence of the spatial resolution in the identification of Forest, Young secondary succession, Mature secondary succession and Non-forest. Thematic maps were made using the Bhattacharya (supervized) classification procedure, followed by visual interpretation. The area of each category was determined in each thematic map, using the 30 m spatial resolution as a reference.

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