A general view of a dump till of stony sand at Ralph Lake after the 1967 fire and a black backpack in the bottom right corner. Soil #2.

Man in yellow standing behind a dirt pile at Ralph Lake after 1967 fire surrounded by trees. Soil #2,3,4.

General views of Ralph Lake near Sioux Lookout after it was burnt in June 1967.

A pencil in front of a cross section of soil. A close-up of ground near Sioux Lookout that was burnt in 1967. Soil #1.

A pencil in front of a cross section of soil. A closer view of ground near Sioux Lookout that was burnt in 1967. Soil #1.

A pencil in front of a cross section of soil. A general view of ground near Sioux Lookout that was burnt in 1967. Soil #1.

Radar dome, Sioux Lookout - June 1967 fire.

Clonal variation in radiata pine (California)

Petawawa - PNre - normal and fastigiate form (grafts)

Niagara - PIg - Orono seed tree planted 1978