Mechanical planting a suitable method in difficult terrain
Mechanical planting has a lot of advantages, which especially in difficult
terrain can compensate for the somewhat higher cost.
The prerequisites for a higher degree of mechanisation in the regeneration
process were discussed at a seminar on mechanical planting arranged by Södra
(the Association of South Swedish Forest Owners).
performance, plant survival and costs for different planting machines was
presented by external lecturers at the seminar. A comparison of costs showed
that for large-scale forestry the net cost is approximately 40% higher per
plant with mechanical planting, but the difference is less if factors such as
plant survival and growth are included. While Holmen, Södra and the Swedish
Forest Agency (average for the whole country) demonstrated a plant survival of
70%, 70% and 60% respectively, the survival percentage for planting carried
out by a Bracke P11.a Planter is on average 80% (source: the Forestry Research
Institute of Sweden [SkogForsk]).
Pl1.a, which is mounted on an
excavator or harvester, also produces very good results even on very hilly and
stony ground. Mechanical planting on such land stands out as a very