Provenance research on Norway spruce (Picea abies) in the Czech Socialist Republic [Czechoslovakia]

arbre arbre brise-vent arbre forestier arbre pour bois de construction biological development checoslovaquia conifere conifers crecimiento croissance crops cultivos czechoslovakia economic plants europa europe fisiologia fonction physiologique forest trees genetic resources gimnospermas growth gymnosperme gymnosperms living resources natural resources physiological functions physiologie physiology picea picea abies pinaceae plant establishment plant production plantas plantas protectoras plante plante de culture plante de protection plante pour construction plants production protective plants recursos recursos naturales resources ressource ressource naturelle ressource vivante structural crops timber trees trees windbreak trees