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The aim of this work was to assess the occurrence of Sclerocarya birrea in Chigubo district to provide information about its productive potential to promote the production of canhu oil by local communities. Diameter at breast height (DBH), total height and commercial height and species names were collected in 10 clusters of four plots with 0.2 ha each. The plots were randomly established in the area to determine horizontal forest structure, diameter distribution and timber volumes per unit area. Later on it was estimate de canhu nuts production in Chigubo district. We found diameter distribution in reverse J-shaped, 106 trees ha-1, with 50.59% from S. birrea, and total basal area of adult species of 34.26 m² ha-1, with 24.36 m² ha-1 (71.01%) represented by S. birrea. Sclerocarya birrea nuts production was estimate as 13,345 kg ha-1year-1. [ABSTRACT FROM AUTHOR]

In this work, from the equation y=bxr, a methodology that links the different geometric solids in four segments of standing trees trunks was developed. Data from 1297 scaled trees of the hybrid Eucalyptus grandis and Eucalyptus urophylla were used for the preliminary analysis and independent data from another 65 scaled trees for the validation of the developed methodology related to the taper and volume predictions. The evaluation criteria of the quality and fitness of the methodology were based on the graphic analyses of the residuals and on the followings statistics: mean percentual deviation, residual standard error, accuracy obtained from the Chi-square test and the variance analyses by the Entirely Randomized Design in Subdivided Blocs with the use of the Dunnett test, both at 0.05 significance level. It was concluded that from a greometric solid, or optimized dendrometric prototype, it is possible to simulated the scaling of standing trees, measuring the trunk diameters located only at: 0.3 m, 1.3 m, h-2/2 and on h-1,25/1,25, besides the total height h, whose processes were included in a methodology named Relative Height Method with Two Diameters (hr2D). [ABSTRACT FROM AUTHOR]