Extraction is
one of the main functions of harvesting and means the change of the
position of the working object. In forest operations we differentiate three
steps
-
from
the felling site to the next facility that is provided for transport purposes
like a strip road, trail or corridor; we call this first step pre-skidding
or in case of a yarderlateral yarding; if the machines are allowed to
drive on the forest floor without limitation to any trails, this step of pre-skidding
is obsolete
-
alongside
the trail to the landing where the logs can be handed over to the long-distance
transport; we have different words for this step like skidding, forwarding
and yarding
-
from
the landing or storage in the forest to the customer; this long-distance transport
uses public roads, waterways, railways etc.; in Technodiversty it is not
elaborated as well, because the project concentrates to the processes inside
the forest.
