Resumo

FRIAS TAMAYO, Marisela; PEREIRA JAY, Nheza Filomena  e  ALDANA PEREIRA, Edilio. Preliminary evaluation of the efficacy of the variable probability method in Miombo woodland. Rev cubana ciencias forestales [online]. 2021, vol.9, n.2, pp. 193-204.  Epub 03-Ago-2021. ISSN 2310-3469.

In the research, three factors of basal area were analyzed according to the theoretical basis of sampling with variable probability, with the objective of preliminarily evaluating the effectiveness of Bitterlich's variable probability method for the estimation of basal area in forests of the Miombo formation. By means of systematic sampling, 11 temporary circular plots of fixed area of 500 m2 were established. In the center of each of these plots, measurement points were established with a mirror relascope, where the basal area factors (FAB) 1, 2 and 4 were used. The fixed area plots were taken as references and the results were compared for which the analysis was performed with the statistical package SPSS for Windows Version 19.0. There were no significant differences in the results of basal areas obtained between the different factors of basal area 1, 2 and 4, with respect to those obtained in the plots of fixed areas. In the time analysis, basal area factor number four was the best with the least number of minutes during the measurement of the sampling unit.

Palavras-chave : Horizontal point sampling; Basal area; Systematic sampling; Miombo..

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