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| Format: | Artículo científico |
| Language: | en |
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Academia Brasileira de Ciências
2014
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| Online Access: | https://www.redalyc.org/articulo.oa?id=32732907040 |
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Table of Contents:
- Mapping of sites in forest stands SYLVIO PÉLLICO NETTO FLAVIO R. STEFANELLO ALLAN L. PELISSARI HASSAN C. DAVID Multidisciplinaria (Ciencias Naturales y Exactas) Pinus elliottii spatial variation stratification by sites Prodan's sampling method Generally, the forest companies use the total one year planting area as a minimum stratum of the total population and, consequently, the forest inventory processing has been conducted by applying the stratified random sampling to it. This study was carried out in the National Forest of Tres Barras, Brazil, and it aimed to classify and map the sites of Pinus elliottii stands. A systematic sampling was structured into clusters and applied independently by compartments. The clusters, in maltese cross, were composed of four sampling subunits, using Prodan sampling method with a fixed number of six trees. By analysis of the methodology it was possible to confirm the hypothesis: a) the selective thinning cause expressive increase of volumetric variability within compartments; b) the variation of sites within the compartments causes volumetric expansion of variance and this grows proportionally to the quality of the sites; c) the stratification in sites results in minimum variance within them; d) the stratification in sites resulted in until to 91% reduction of variances within them. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907040 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86