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16" Diameter Limit Cut

Details
Published on Monday, 17 October 2011 11:06

 

 

If the stand described in the "Thinning" scenario was not thinned, rather the timber cut using a diameter limit harvest of 16 inches allowing the residual to grow for the 15 year period with all timber assigned the highest possible board foot value based on DBH as per USDA Forest Service grading rules where:

  • <9.6"=pulpwood

  • 9.6-12.5"=F3 log grade

  • 12.6-15.5"=F2 log grade

  • >15.6"=F1 log grade


 

 

At stand age 70 years--

Total value of unthinned 1 acre stand at stand age 70 years=$4418.23

Assumed 15 year DBH growth rates for the species are:

  • Red Oak-3.75 inches

  • Chestnut Oak- 3 inches

  • Yellow-Poplar- 4.5 inches

  • Black Cherry- 3.75 inches

  • Soft Maple- 3 inches

  • Hard Maple- 3 inches

No Treatment

Details
Published on Monday, 17 October 2011 11:03

If the stand described in "Thinning" was not thinned, rather the timber not cut was theoretically allowed to grow for 15 years.  At stand age 70 years the trees were assigned the highest possible board foot value based on DBH as per USDA Forest Service grading rules where:

  • <9.6"=pulpwood

  • 9.6-12.5"=F3 log grade

  • 12.6-15.5"=F2 log grade

  • >15.6"=F1 log grade

 

At stand age 70 years--

Total value of unthinned 1 acre stand at stand age 70 years=$4418.23

Assumed 15 year DBH growth rates for the species are:

  • Red Oak-3.75 inches

  • Chestnut Oak- 3 inches

  • Yellow-Poplar- 4.5 inches

  • Black Cherry- 3.75 inches

  • Soft Maple- 3 inches

  • Hard Maple- 3 inches

Thinning

Details
Published on Monday, 17 October 2011 10:49

This pie chart breaks down the value of an actual one acre Appalachian hardwood stand that was thinned using an appropriate silvicultural prescription.  The timber removed at the time of the thinning (stand age 55years) as well as the timber in the residual stand fifteen years following thinning (stand age 70 years) was assigned the highest board foot value according to USDA Forest Service diameter rules for pulp through F1 log grade.

  • <9.6"=pulpwood

  • 9.6-12.5"=F3 log grade

  • 12.6-15.5"=F2 log grade

  • >15.6"=F1 log grade.

 

The value of the timber removed in the thinning was compounded simply at 3% for fifteen years and added to the value of the residual stand at stand age 70 years.

 

Total value of properly thinned one acre stand at stand age 70 years=$7103.08

Clear Cut

Details
Published on Monday, 17 October 2011 11:00

If the value of the timber of the actual stand described in the "Thinning" scenario were assigned the highest possible board foot value based on DBH as per USDA Forest Service grading rules where:

  • <9.6"=pulpwood

  • 9.6-12.5"=F3 log grade

  • 12.6-15.5"=F2 log grade

  • >15.6"=F1 log grade.

and then clear cut instead of thinned at stand age 55 years with this value compounded simply at 3% for fifteen years the result is:

Total value of one acre stand at stand clearcut age

55 and money invested for 15 years=$6813.78