PNs & blister rust - grafted stock of resistant seedlings

PNs & blister rust (a year later) - bed of Pw with 4 seedlings live

PNs & blister rust. Seedlings 3-4 years old with Ribes in bed, some resistance?

PNs hybrids - maple

PNsy from Nisula Forest in Finland - planted July 1967

Pinus sylvestris IUFRO - Solena - 2.5 m spacing

Pinus sylvestris IUFRO - Solena - 1.6 m spacing

Pinussylvestris IUFRO - Solena - PNSY control

Pinus sylvestris IUFRO - Adal - Pinus sylvestris fertilized at 45 years, inc. 2-3.5 cubic metres/ha/yr - now 51 years old

Pinus sylvestris IUFRO - Adal - PNSY fertilized at 45 years, now 51 years