Technodiversity Glossary

Tree lengths that are pre-skidded to the trail are skidded to the forest road. This includes: setting chokers on several tree-lengths to optimize the load, skidding them to forest road, storing them alongside road or a landing.

Functiogram

• High productivity because of high mass/load
• Versatile machine, esp. if farm-tractor based (farm work, snow work, transportation etc.)
• Relatively cheap machine
• Independent relocation if road-legal

• Damages in remaining stand at curves
• Damage to ground (rutting)
• Damage and dirt on logs

• Extraction method when crosscutting should not be done before reaching the forest road (or the customer)
• Very common method in broadleaved trees

Economic suitability

Minutes per cycle

Example:

• machine costs without personal costs: 40,00 Euro/h
• personal costs per person: 35,00 Euro/h
• number of persons: 2
• in total: 110,00 Euro/h
• regression line minutes per tree
  • b₀ = 3,0
  • b₁ (tree volume) = 1,0
  • b₂ (skidding distance) = 0,01

Ecological suitability

Ecograms 

Social suitability

• S-class: unloading tree length on the road -> S3
  
• E-class: simple machine work, heavy and dangerous -> E3