Jon Dietrichson

• Selection of eight-year-old Norway spruce (Picea abies (L.) karst.) plants in a progeny trial and mass production by cuttings
• Provenance and resistance to Scleroderris lagerbergii Gremmen <Crumenula abietina Lagerb.>
• Resultater fra et avkomforsøk med gran (Picea abies (L.) Karst.) fra Opsahl i Ringebu