Comparison of a few characters of Yezo spruce (Picea jezoensis) and Saghalien spruce (P. glehnii) growing at different altitudes [Japan]

altitud altitude anatomia anatomie anatomy arbre arbre forestier arbre pour bois de construction asia asie biological development bosques conifere coniferous forests conifers crecimiento croissance crops cultivos economic plants environment environnement fisiologia fonction physiologique forest trees forests gimnospermas growth gymnosperme gymnosperms japan japon medio ambiente physiological functions physiologie physiology picea picea jezoensis pinaceae plant anatomy plantas plante plante de culture plante pour construction plants site factors structural crops taxa taxon taxonomia taxonomie taxonomy timber trees trees variedades varieties vegetation