Aerial view of natural regeneration of balsam fir & spruce treated with pulp mill sludge @ 8-12 tons/acre. N.B. grey areas have been treated. S.D. Warren.

Aerial view of pulp mill sludge treatment operation. 8-12 tons/acre and approximately 750 acres treated annually. S.D. Warren. N.B. no data on the results.

Precommercial thinning in older cutovers. S.D. Warren.

Aerial view of two age classes of precommercial thinning in balsam fir & spruce. S.D. Warren.

Aerial view of recent precommercial thinning in balsam fir & spruce. N.B. red brown of dead material. S.D. Warren.

Aerial view of precommercial thinning in natural balsam fir & spruce. S.D. Warren.

Aerial view of precommercial thinning in natural balsam fir and spruce. S.D. Warren.

Current harvesting in 150 year white pine with 70 year spruce. S.D.Warren.

Aerial view of 35 acre (14 hectare) clearcut in hardwoods. N.B. absence of slash - everything utilized. S.D. Warren.

Aerial view of clearcuts in hardwoods. N.B. patterns and age classes. S.D. Warren, Maine