From the
Saxonian technological map we know the idea to expand the distance
between permanent trails when the soils has a high sensitivity.
In
Technodiversity, the decision about the distance between skid trails is made by
the forest owner. This socio-economic
approach gives the full
freedom to him, asking: How
much of the site’s productive potential are you willing to sacrifice to the
technical function?”
Depending on
the answers, we introduce five so-called P-classes (for productivity, but it
does not only depend on the productivity):
P1: At a stand with low value (rocks, pure
sand), any possible damage of traffic is not as important for the owner. Here,
traffic may happen.
P2: At a medium-value stand, where the
advantages of fully mechanized methods are dominant, up to 20% of compacted
soil is acceptable.
P3: At a high value forest stand, where the
owner sees the biological needs prior to technical needs, compaction should
stay under 10%.
P4: At a stand with a very high value, the
technical considerations should be restricted to a minimum, say roundabout 5 %.
P5: Finally, at a stand with an extreme high
value, no machine traffic on the floor is accepted.
When we
assume that a trail has a width of 4 m, then this corresponds with following
patterns of opening-up:
P1: driving is accepted without
any permanent pattern = “unlimited”
P2: trails with “20 m” distance
P3: trails with “40 m” distance
P4: trails on old given routes, mostly >80 m distance = “uneven”
P5: no driving with machines outside constructed roads at all.
These P-classes form the Y-axis oft the technogram of a stand as well as the ecogram of harvestingmethods.
