Laerte Guimarães Ferreira Júnior

TAXAS DE DESMATAMENTO E PRODUÇÃO AGROPECUÁRIA EM GOIÁS - 2003 a 2007

In this work we evaluated the use of deforestation rates for a better assessment and understanding regarding land use and occupation in the Cerrado biome. In particular, we analysed deforestation rates for the state of Goias, on a municipality basis, for the 2003 – 2007 period, which were correlated to the respective agricultural spatial distribution. This study demonstrated that deforestation rates are closely related to the spatial distribution of major agricultural commodities. Nevertheless, our results also suggest caution regarding the use of these rates for predictive scenarios, which are often based on single fi gures, in spite the fact that rates are subject to signifi cant spatial and temporal variations, mainly due to the infl uence of political and socioeconomic factors.

DEVELOPMENT OF A TECHNOLOGICAL INDEX FOR THE ASSESSMENT OF THE BEEF PRODUCTION SYSTEMS OF THE VERMELHO RIVER BASIN IN GOIÁS, BRAZIL

This study analyzed the productive strategies and technology of beef producers in the Vermelho basin in Goiás, Brazil. The data were used to develop a technological index, applicable to the local beef production systems. The data were obtained using questionnaires. A set of 60 properties was selected to provide a representative sample of the relief and soil quality within the study area. The data were analyzed using multiple correspondence, cluster analysis, and beta regression procedures. The variables that most contributed to the definition of the technological level were identified. The variables and production units each formed three clusters, corresponding to three levels of technology: low, mid, and high. The data were used to calculate a predictive index for the analysis and mapping of the technology used in the study area. High cattle densities were found in systems with low technology, indicating low productivity and profitability, and reduced environmental sustainability.

PADRÕES DE DISTRIBUIÇÕES ESPACIAIS E TEMPORAIS DE TEMPERATURAS ASSOCIADOS AO BIOMA CERRADO

Resumen pt: A presenca de vegetacao e um importante fator na manutencao de processos biogeoquimicos da natureza. No Cerrado, a conversao da vegetacao natural em area...