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Let’s Move Beyond Outdated Merchantability Standards

Let’s Move Beyond Outdated Merchantability Standards. 4.0 inches d.o.b. Total Stem Volume/Biomass. Merchantable portion. Saw-log portion. 1-foot stump. National cull deduction options for net cubic-foot volume (VOLCFNET) of the merchantable portion of live trees 5.0” diameter and larger.

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Let’s Move Beyond Outdated Merchantability Standards

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  1. Let’s Move Beyond Outdated Merchantability Standards 4.0 inches d.o.b. Total Stem Volume/Biomass Merchantableportion Saw-log portion 1-foot stump

  2. National cull deduction options for net cubic-foot volume (VOLCFNET) of the merchantable portion of live trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull 4.0 inches d.o.b. • Options for use on non-broken top trees: • Gross cubic-foot volume of the merchantable • portion minus deductions for (rotten+missing) • Options for use on broken top trees: • Gross cubic-foot volume of the merchantable portion minus deductions • for (rotten+missing+broken-top) Cubic merchantableportion • Computations by tree component: • VOLCFNET=merch. stem

  3. National cull deduction options for net cubic-foot volume (VOLCFNET) of the merchantable portion of dead trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull 4.0 inches d.o.b. • Options for use on non-broken top trees: • Gross cubic-foot volume of the merchantable • portion minus deductions for (rotten+missing) • Options for use on broken top trees: • Gross cubic-foot volume of the merchantable portion minus deductions • for (rotten+missing+broken-top) Cubic merchantableportion • Computations by tree component: • VOLCFNET=merch. stem Note: Recommendation to collect actual and total length for all 5.0”+ dead trees.

  4. National cull deduction options for net above ground biomass (DRYBIOTNET) of live trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull • Options for use on non-broken top trees merch. stem: • Gross above ground biomass • minus deductions for (missing+rot factor) • Options for use on broken top trees merch. stem: • Gross above ground biomass minus deductions for (missing+broken-top+rot factor) • Options for use on top and branches: • If no broken-top cull: then top/branches biomass has no deductions • If broken-top cull (below 4” top): top/branches biomass is reduced relative to broken-top cull • (by species?) • If broken-top cull (above 4” top): top/branches biomass reduced proportional to amount of missing volume of main stem Main Stem And branches • Option for use on stump: • Gross stump biomass = net stump biomass • Computations by tree component: • DRYBIOTNET=merch. stem+tops/branches+stump

  5. National cull deduction options for net above ground biomass (DRYBIOTNET) of dead trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull • Options for use on non-broken top trees merch. stem: • Gross above ground biomass • minus deductions for (missing+rot factor) • Options for use on broken top trees merch. stem: • Gross above ground biomass minus deductions for (missing+broken-top+rot factor) • Options for use on top and branches: • If no broken-top cull: then top/branches biomass has no deductions • If broken-top cull (below 4” top): top/branches biomass is reduced relative to broken-top cull • (by species?) • If broken-top cull (above 4” top): top/branches biomass reduced proportional to amount of missing volume of main stem Main Stem And branches • Option for use on stump: • Gross stump biomass = net stump biomass • Computations by tree component: • DRYBIOTNET=merch. stem+tops/branches+stump Assumptions: All units collect actual and total length for all 5.0”+ dead trees and do all three cull variables for 5.0-inch+ dead trees.

  6. National cull deduction options for net above ground biomass (DRYBIOTNET) of live trees 1.0 – 4.9” diameter • Associated national cull variables • Broken-top cull • Options for use on non-broken top trees main stem: • Gross above ground biomass equals net • above ground biomass • Assumption: The majority of cull in saplings • is from missing tops and thus wouldn’t warrant culling • saplings for rot or missing • Options for use on broken top tree’s main stem: • Gross above ground biomass of main stem minus deductions for broken-top Main Stem And branches • Options for use on broken top tree’s branches: • Branches biomass is reduced by differing amounts of broken-top cull (by species?) • Computations by component for broken-top saplings: • DRYBIOTNET=main stem+branches Assumptions: All units collect actual and total length for all live saplings.

  7. National cull deduction options for net above ground biomass (DRYBIOTNET) of dead trees 1.0 – 4.9” diameter • Associated national cull variables • Broken-top cull • Options for use on non-broken top trees: • Gross above ground biomass equals net • above ground biomass • Assumption: The majority of cull in saplings • is from missing tops and thus wouldn’t warrant culling • saplings for rot or missing • Options for use on broken top tree’s main stem: • Gross above ground biomass of main stem minus deductions for broken-top Main Stem And branches • Options for use on broken top tree’s branches: • Branches biomass is reduced by differing amounts of broken-top cull (by species?) • Computations by tree component for broken-top saplings: • DRYBIOTNET=main stem+branches Assumptions: Add dead saplings back to inventory and all units collect actual and total length for all dead saplings.

  8. National cull deduction options for net above ground biomass (DRYBIOMNET) of the merchantable portion of live trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull 4.0 inches d.o.b. • Options for use on non-broken top trees: • Gross above ground biomass of the merchantable • portion minus deductions for (missing+rot factor) • Options for use on broken top trees: • Gross above ground biomass of the merchantable portion minus deductions for (missing+rot factor+broken-top) Merchantableportion • Computations by tree component: • DRYBIOMNET=merch. stem

  9. National cull deduction options for net above ground biomass (DRYBIOMNET) of the merchantable portion of dead trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull 4.0 inches d.o.b. • Options for use on non-broken top trees: • Gross above ground biomass of the merchantable • portion minus deductions for (missing+rot factor) • Options for use on broken top trees: • Gross above ground biomass of the merchantable portion minus deductions for (missing+rot factor+broken-top) Merchantableportion • Computations by tree component: • DRYBIOMNET=merch. stem Assumptions: All units collect actual and total length for all 5.0”+ dead trees and do all three cull variables for 5.0-inch+ dead trees.

  10. National cull deduction options for net cubic-foot volume (VOLCFSTEMNET) of the main stem of livetimber trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull • Options for use on non-broken top trees: • Gross cubic-foot volume of the main stem • minus deductions for (rotten+missing) • Options for use on broken top trees (broken below merch top): • Gross cubic-foot volume of the main stem minus deductions for (rotten+missing+broken-top) Main Stem • Options for use on broken top trees (broken above merch top): • Gross cubic-foot volume of the main stem minus deductions for (rotten+missing+top missing above merch?) • Computations by tree component: • VOCFSTEMNET=merch. stem+top+stump • Assumptions:Cull in the stump is considered negligible and the missing top above merch. can be calculated from actual/total height measurements.

  11. National cull deduction options for net cubic-foot volume (VOLCFSTEMNET) of the main stem of deadtimber trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull • Options for use on non-broken top trees: • Gross cubic-foot volume of the main stem • minus deductions for (rotten+missing) • Options for use on broken top trees (broken below merch top): • Gross cubic-foot volume of the main stem minus deductions for (rotten+missing+broken-top) Main Stem • Options for use on broken top trees (broken above merch top): • Gross cubic-foot volume of the main stem minus deductions for (rotten+missing+top missing above merch?) • Computations by tree component: • VOCFSTEMNET=merch. stem+top+stump • Assumptions:Cull in the stump is considered negligible and the missing top above merch. can be calculated from actual/total height measurements, and all units collect actual and total length for all 5.0”+ dead trees and do all three cull variables for 5.0-inch+ dead trees.

  12. National cull deduction options for net cubic-foot volume (VOLCFSTEMNET) of the main stem of live timber trees 1.0 – 4.9” diameter • Associated national cull variables: • Broken-top cull • Options for use on non-broken top trees main stem: • Gross cubic-foot volume of equal • to net cubic-foot volume • Assumption: The majority of cull in saplings • is from missing tops and thus wouldn’t warrant culling • saplings for rot or missing • Options for use on broken top trees main stem: • Gross cubic-foot volume minus deductions for broken-top Main Stem • Computations by tree component: • VOLCFSTEMNET=main stem Assumptions: All units collect actual and total length for all live saplings.

  13. National cull deduction options for net cubic-foot volume (VOLCFSTEMNET) of the main stem of deadtimber trees 1.0 – 4.9” diameter • Associated national cull variables: • Broken-top cull • Options for use on non-broken top trees main stem: • Gross cubic-foot volume equal to • net cubic-foot volume • Assumption: The majority of cull in saplings • is from missing tops and thus wouldn’t warrant culling • saplings for rot or missing • Options for use on broken top trees main stem: • Gross cubic-foot volume minus deductions for broken-top Main Stem • Computations by tree component: • VOLCFSTEMNET=main stem Assumptions: Add dead saplings back to inventory and all units collect actual and total length for all dead saplings.

  14. National cull deduction options for net above ground biomass (DRYBIOTSTEMNET) of the main stem of live timber trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull • Options for use on non-broken top trees merch. stem: • Gross above ground biomass • minus deductions for (missing+rot factor) • Options for use on broken top trees merch. stem: • Gross above ground biomass minus deductions for (missing+broken-top+rot factor) • Options for use on top: • If no broken-top cull: then top biomass is based on top volume • If broken-top cull (below 4” top): top biomass is reduced by amount of broken-top cull (by species?) • If broken-top cull (above 4” top): top biomass reduced proportional to amount of missing volume of main stem Main Stem • Option for use on stump: • Gross stump biomass = net stump biomass • Computations by tree component: • DRYBIOTSTEMNET=merch. stem+top+stump • Assumptions:Cull in the stump is considered negligible and the missing top above merch. can be calculated from actual/total height measurements.

  15. National cull deduction options for net above ground biomass (DRYBIOTSTEMNET) of the main stem of dead timber trees 5.0” diameter and larger • Associated national cull variables: • Rotten cull • Missing cull • Broken-top cull • Options for use on non-broken top trees merch. stem: • Gross above ground biomass • minus deductions for (missing+rot factor) • Options for use on broken top trees merch. stem: • Gross above ground biomass minus deductions for (missing+broken-top+rot factor) • Options for use on top: • If no broken-top cull: then top biomass is based on top volume • If broken-top cull (below 4” top): top biomass is reduced by amount of broken-top cull (by species?) • If broken-top cull (above 4” top): top biomass reduced proportional to amount of missing volume of main stem Main Stem • Option for use on stump: • Gross stump biomass = net stump biomass • Computations by tree component: • DRYBIOTSTEMNET=merch. stem+top+stump • Assumptions:Cull in the stump is considered negligible and the missing top above merch. can be calculated from actual/total height measurements, and all units collect actual and total length for all 5.0”+ dead trees and do all three cull variables for 5.0-inch+ dead trees.

  16. National cull deduction options for net above ground biomass (DRYBIOTSTEMNET) of the main stem of live timber trees 1.0 – 4.9” diameter • Associated national cull variables: • Broken-top cull • Options for use on non-broken top trees main stem: • Gross above ground biomass of equals net above ground biomass • Assumption: The majority of cull in saplings • is from missing tops and thus wouldn’t warrant culling • saplings for rot or missing Main Stem • Options for use on broken top trees main stem: • Gross above ground biomass minus deductions for broken-top • Computations by tree component: • DRYBIOTSTEMNET=main stem Assumptions: All units collect actual and total length for all live saplings.

  17. National cull deduction options for net above ground biomass (DRYBIOTSTEMNET) of the main stem of dead timber trees 1.0 – 4.9” diameter • Associated national cull variables: • Broken-top cull • Options for use on non-broken top trees main stem: • Gross above ground biomass equals • net above ground biomass • Assumption: The majority of cull in saplings • is from missing tops and thus wouldn’t warrant culling • saplings for rot or missing Main Stem • Options for use on broken top trees main stem: • Gross above ground biomass minus deductions for broken-top • Computations by tree component: • DRYBIOTSTEMNET=main stem Assumptions: Add dead saplings to inventory and all units collect actual and total length for dead saplings.

  18. National cull deduction options for net board-foot volume (VOLBFNET) of the saw-log portion of a growing stocktimber (excluding cull species) tree of sawtimber size • Associated national cull variable: • Total Board-foot cull 4.0 inches d.o.b. • Options for use on all growing stock trees: • Gross board-foot volume of the saw-log portion minus deductions for total board foot cull • Computations by tree component: • VOLBFNET=merch. sawlog 7.0-inch top d.o.b. for softwoods and 9.0-inch top d.o.b. for hardwoods sawtimber, or potential for poletimber cubic-foot Saw-log portion 1-foot stump

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