Pinus sylvestris IUFRO tour - PNsy fertilized 1945, and every 6 years since, age now 130 yr.

Pinus sylvestris IUFRO Tour - cross-section of PNsy now 130 years old

Pinus sylvestris IUFRO tour - upper bole

Pinus sylvestris IUFRO tour - crowns of 130 yr trees

Pinus sylvestris IUFRO tour - 34 year old PNsy - 2 metre spacing. Geo. Stoebler

Pinus sylvestris IUFRO - Solena - 2.5 m spacing

Pinus sylvestris IUFRO - Solena - 1.6 m spacing

Pinussylvestris IUFRO - Solena - PNSY control

Pinus sylvestris IUFRO - Solena - Pinus sylvestris control

Pinus sylvestris IUFRO - Solena - precommercial, thinned at 13 years, now 34 years old