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    Site Index Model For Natural Stands Of Rebollo Oak ( Quercus pyrenaica Willd.) In Galicia, NW Iberian Peninsula

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    Dados da an\ue1lise de tronco de 56 \ue1rvores dominantes de Quercus pyrenaica Willd. de florestas naturais da Galicia (NW Pen\uednsula Ib\ue9rica) foram utilizados para avaliar quatro equa\ue7\uf5es dinamicas de \uedndice de sitio obtidas com a Abordagem Generalizada de Diferen\ue7a Alg\ue9brica (GADA). Todas as equa\ue7\uf5es s\ue3o baseadas na idade invariante e diretamente estimam a altura e o \uedndice de sitio. Os ajustes foram feitos utilizando uma estrutura de dados que incluiam todos os poss\uedveis intervalos de crescimento. A formula\ue7\ue3o GADA teve base no modelo Bertalanffy- Richards, considerando a ass\uedntota e do padr\ue3o inicial como par\ue2metros relacionados \ue0 produtividade do sitio. Assim, recomenda-se o modelo na previs\ue3o do crescimento em altura e classifica\ue7\ue3o de sitios para povoamentos naturais de carvalho negro na Galicia. A autocorrela\ue7\ue3o foi analisada com um teste de res\uedduos utilizando Durbin's t-teste, sem chegar a um resultado significativo de autocorrela\ue7\ue3o entre os dados.Data from stem analysis of 56 dominant trees of Quercus pyrenaica Willd., in natural stands in Galicia (NW Iberian Peninsula), were used to evaluate four dynamic site equations derived with the Generalized Algebraic Difference Approach (GADA). All the equations are base-age invariant and directly estimate height and site index from any height and age. The fittings were made using a data structure involving all possible growth intervals. The GADA formulation derived on the basis of the Bertalanffy- Richards model by considering the asymptote and the initial pattern parameters as related to site productivity. It is therefore recommended for height growth prediction and site classification for natural stands of rebollo oak in Galicia. The autocorrelation was analyzed with a test of residuals using Durbin\u2019s ttest without reaching a manifest result of autocorrelation between managed data
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