Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/14456
metadata.revistascielo.dc.title: THE QUADRANTS METHOD TO ESTIMATE QUANTITATIVE VARIABLES IN MANAGEMENT PLANS IN THE AMAZON
metadata.revistascielo.dc.creator: Oliveira, Gabriel da Silva
Cavalcanti, Francisco José de Barros
Melo, Lucas Amaral de
Monte, Marco Antonio
metadata.revistascielo.dc.subject: Forest inventory, precision, accuracy.
metadata.revistascielo.dc.publisher: CERNE
CERNE
metadata.revistascielo.dc.date: 19-Apr-2016
metadata.revistascielo.dc.identifier: http://www.cerne.ufla.br/site/index.php/CERNE/article/view/1120
metadata.revistascielo.dc.description: This work aimed to evaluate the accuracy in estimates of abundance, basal area and commercial volume per hectare, by the quadrants method applied to an area of 1.000 hectares of rain forest in the Amazon. Samples were simulated by random and systematic process with different sample sizes, ranging from 100 to 200 sampling points. The amounts estimated by the samples were compared with the parametric values recorded in the census. In the analysis we considered as the population all trees with diameter at breast height equal to or greater than 40 cm. The quadrants method did not reach the desired level of accuracy for the variables basal area and commercial volume, overestimating the observed values recorded in the census. However, the accuracy of the estimates of abundance, basal area and commercial volume was satisfactory for applying the method in forest inventories for management plans in the Amazon.
metadata.revistascielo.dc.language: eng
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