Technodiversity Glossary

Felled trees are pulled to a trail by means of a tractor winch and collected; when some full trees are collected, the tractor extracts them to the forest road and unloads alongside the road.

Functiogram

Advantages

• due to the cable, the area from which full trees can be extracted, is large
• capable for steep terrain (pre-skidding uphill)

Limitations. thresholds

• extraction length of the cable limited by the human power, maximum 50 m
• damage caused by the full trees

Main use

• small scale forestry with own tractors

Economic suitability

Example:

• machine costs without personal costs: 65,00 Euro/h
• personal costs per person: 35,00 Euro/h
• number of persons: 2
• in total: 135,00 Euro/h
• regression line minutes per tree
  • b₀ = 4,0
  • b₁ (tree volume) = 2,0
  • b₂ (skidding distance) = 0,005

Ecological suitability:

Ecograms

Social suitability:

• S-class: unloading full trees on forest road -> S3
• E-class: simple machine work, heavy and dangerous -> E3