O setor florestal está em constante desenvolvimento, sendo responsável por uma contribuição crescente ao produto interno bruto do Brasil. Novos empregos são gerados a cada ano, com a implantação de fábricas e filiais, além da compra de novas áreas de plantio por parte das grandes empresas, incluindo áreas de proteção permanente. O objetivo desse trabalho foi gerar um modelo de ranqueamento para determinar a influência e importância das empresas para o setor florestal e industrial do país. Foram analisados os perfis de mais de 40 empresas do ramo, associadas da Indústria Brasileira de Árvores, sendo selecionadas 20, com base no faturamento anual, área de plantio, área de proteção, geração de empregos e investimento social. Cada um dos critérios recebeu uma pontuação (variação de 1 a 20). Dessa forma, obteve-se uma matriz de ranqueamento empresarial do setor florestal brasileiro, juntamente com valores para se calcular o índice de eficiência. Este modelo pode ser utilizado para qualquer outro setor industrial, sendo necessária apenas à substituição dos critérios de área plantada e área preservada para os específicos de produção do setor que se pretende analisar.
Post-harvest, wood volume can be calculated with a stacking factor which can be influenced by diameter classes involved. Consequently, the following question arises: there is a difference between the volume conversion factor for stacked to geometric volume between piles of clonal plantation logs of different diameters classes? The hypothesis is: if smaller logs have a higher stacked to geometric volume conversion factor, between-log voids will be smaller and the overall stacks will therefore have lower volumes. Therefore, the objective of this study was to compare stacking and cubing factors in stacks of logs with different diameters for two Eucalyptus sp. clones. The study was conducted in Barra do Corda municipality, Maranhão State, Brazil. Timber was laid in piles of logs by diameter class, composed of logs of smaller (9-10.99 cm) and larger (11-13 cm) diameters. Stacking factor means for clone 1 were 1.88 for the larger diameter and 2.00 for the smaller diameter class, while for clone 2 mean values were 1.62 and 1.65, for stacks with larger and smaller diameter classes, respectively. For logs from the same clone there was no significant difference for the conversion factors between the stacks with the largest and smallest diameter. However, there was a significant difference in the conversion factors between the two clones, proving the hypothesis tested. Thus, for each genetic lineage, a proper stacking factor must be established so that the estimated volume comes close to the real value.
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