Objetivo The overall objective of the project is to assess the quality of the sawn timber products based on parameters (site class and silvicultural treatment) to be measured on the standing trees, and to investigate the relation between silvicultural practices and wood quality.The objectives of the project was mainly to assess the quality of the sawn timber products (average and distribution) coming frompopulations of trees for which the following usual measurements are available: total height; diameter at breast height; age. Three species were considered: Norway Spruce Sitka Spruce and Douglas fir. Most complete results were acheived on Norway spruce.In this project, wood quality was mainly judged by the following criteria: position, size and type of knots, ring width, wood density and grain angle distribution in the plank. The project can be grouped into 3 distinct categories: establishing models which relate usual tree descriptions and internal structure of the corresponding trees; feeding an existing software (to improve) with such models, the simulation of various visual grading rules and wood density, and validation of the software; technological characteristics of products obtained from stands in which silvicultural treatment was known. Sampled trees total 300 from 40 stands. Twelve teams from eight countries were involved in the project (Belgium, Germany, Denmark, France, Italy, Ireland, Sweden and United Kingdom).The project will be focused on three species of major importance for the European wood industries: Norway spruce (Picea abies), Sitka spruce (Picea sitchensis) and Douglas fir (Pseudotsuga douglasii). In order to reach the objective, a central point of the project will be to establish quantitative models for the interpretation of the effects of silvicultural practices on wood quality. The established models will be included in software (called SIMQUA). Improvement of the software and the input of statistical and biological relationships which provide intensive descriptions of the tree constitute an essential part of the project. The project will also investigate the technological characteristics of products obtained from stands where the silvicultural treatment is known, in particular: Modelling Young's modulus in relation to age from the pith, ring width, wood density in clear specimens of Norway spruce. Modelling Young's modulus in commercial size boards of Norway spruce. Parameters to include in the modelling will be ring width, wood density and grain angle distribution, size and distribution of knots and Young's modulus on clear wood specimen. Effect of ring width on ability for rotary cutting in pruned Douglas fir and Norway spruce. Effect of juvenile wood and heartwood on properties of sawn products (Norway spruce). Formulation of quality requirements for wood products by the construction industry (Norway spruce). The execution of the project will be carried out through 12 tasks, which can be grouped in three parts. Searching and establishing models which relate given silviculture and internal structure of the corresponding trees: modelling wood density in the tree in relation to silvicultural treatment; modelling ring width variation in the tree in relation to silvicultural treatment; modelling spiral grain variation in the tree in relation to silvicultural treatment; modelling branching in the tree in relation to silvicultural treatment; modelling bark thickness in the tree in relation to silvicultural treatment. Feeding of the software SIMQUA with models found in Part 1. Simulation of various visual grading rules (plus wood density); validation of the software: improvement of the software SIMQUA; validation of the software SIMQUA. Technological characteristics of products obtained from stands where silvicultural treatment is known: influence of juvenile wood and heartwood on properties of sawn products; effect of ring width on the suitability for rotary cutting in pruned Douglas fir and Norway spruce; modelling Young's modulus in commercial size boards; modelling Young's modulus in clear specimens; formulation of quality requirements for wood products by the construction industry. Ámbito científico natural sciencescomputer and information sciencessoftwareagricultural sciencesagriculture, forestry, and fisheriesagriculturegrains and oilseedsagricultural sciencesagriculture, forestry, and fisheriesforestrysilviculture Programa(s) FP2-FOREST - Specific research and technological development programme (EEC) in the fields of raw materials and recycling - Renewable raw materials: Forestry and wood products (including cork) -, 1990-1992 Tema(s) Data not available Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador University Wales - Bangor Aportación de la UE Sin datos Dirección College Road LL57 2UW Bangor - Gwynedd Reino Unido Ver en el mapa Coste total Sin datos Participantes (11) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo CHALMERS UNIVERSITY OF TECHNOLOGY Suecia Aportación de la UE Sin datos Dirección 8,Sven Hultins Gata 8 412 96 GOETEBORG Ver en el mapa Coste total Sin datos Centre Technique du Bois et de l'Ameublement Francia Aportación de la UE Sin datos Dirección Avenue de Saint Mandé 10 75012 Paris Ver en el mapa Coste total Sin datos Centre de Recherches Agronomiques de l'Etat Bélgica Aportación de la UE Sin datos Dirección 23,Rue Maréchal Juin 5030 Gembloux Ver en el mapa Coste total Sin datos Den Kongelige Veterinær- og Landbohøjskole Dinamarca Aportación de la UE Sin datos Dirección 13,Bülowsvej 1870 Frederiksberg C Ver en el mapa Coste total Sin datos ECOLE NATIONALE DU GENIE RURAL, DES EAUX ET FORETS Francia Aportación de la UE Sin datos Dirección Rue Girardet 14 54042 NANCY Ver en el mapa Coste total Sin datos Ecole Polytechnique Fédérale de Lausanne Suiza Aportación de la UE Sin datos Dirección GCH2,Ecublens 1015 Lausanne Ver en el mapa Coste total Sin datos Enterprise Ireland - Trading as Bioresearch Ireland Irlanda Aportación de la UE Sin datos Dirección Ballymun Road - Glasnevin 9 Dublin Ver en el mapa Coste total Sin datos Faculté des Sciences Agronomiques de Gembloux Bélgica Aportación de la UE Sin datos Dirección 2,Passage des Déportés 5030 Gembloux Ver en el mapa Coste total Sin datos GEORG-AUGUST-UNIVERSITY GOETTINGEN Alemania Aportación de la UE Sin datos Dirección Büsgenweg 4 37077 Göttingen Ver en el mapa Coste total Sin datos Institut National de la Recherche Agronomique (INRA) Francia Aportación de la UE Sin datos Dirección Centre de Recherche de Nancy Champenoux 54280 Seichamps Ver en el mapa Coste total Sin datos Università degli Studi di Firenze Italia Aportación de la UE Sin datos Dirección Via San Bonaventura 13 50145 Firenze Ver en el mapa Coste total Sin datos