main objective of this study was to evaluate soil disturbances generated
during ground-based logging using a track skidder, in a final harvest
of a 25 year-old Pinus radiata stand. The study area of 13.42 hectares
is located in the Tenth Region of Chile, on clayed loam soils and
harvesting occurred during the spring of 2002.
showed that trails and landings under the planned condition occupied
the 32.5% of total surface. In contrast, in the un-planned sector,
the 50% of the surface showed some level of damage. For the condition
of main skidroads under planned logging condition, the soil bulk
density came to be the double of the unaffected situation and a
38% higher than in the case of secondary skidroads.
a complementary objective was carried on. Through the evaluation
of historic and reliable new information, soil recovery capacity
on skid trails abandoned 20 years ago was analyzed. The soil under
skid trails showed severe compaction up to 40 cm depth twenty years
ago, and the new outputs show a recovery of the bulk density in
the first 20 cm, while soil compaction persists at deeper layers.
conclusions of the study, it is possible to mention that planned
skid trails generate an environmental benefit, because a lower percentage
of the soils are affected by logging operations. Also, that soil
compaction tend to recover with time specially at the superficial
layer although high bulk densities are still found below 20 cm deep
at skid trails abandoned 20 years ago which might negatively affect
soil compaction, ground-based logging, soil recovery.