Data/hora: 02/06/2024 13:29:55

Provedor de dados: 	42	
País: 	Brazil	
Título: 	Mapping of sites in forest stands	
Autores: 	NETTO,SYLVIO PÉLLICO; STEFANELLO,FLAVIO R.; PELISSARI,ALLAN L.; DAVID,HASSAN C.	
Data: 	2014-12-01	
Ano: 	2014	
Palavras-chave: 	Pinus elliottii; Prodan's sampling method stratification by sites spatial variation.	
Resumo: 	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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000402025	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/0001-3765201420130480	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.86 n.4 2014	
Fonte: 	info:eu-repo/semantics/openAccess