http://www.cnr.it/ontology/cnr/individuo/prodotto/ID73803
Options for the mechanized processing of hardwood trees in Mediterranean forests (Articolo in rivista)
- Type
- Label
- Options for the mechanized processing of hardwood trees in Mediterranean forests (Articolo in rivista) (literal)
- Anno
- 2009-01-01T00:00:00+01:00 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Spinelli R., Magagnotti N., Nati C. (literal)
- Pagina inizio
- Pagina fine
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- Rivista
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Titolo
- Options for the mechanized processing of hardwood trees in Mediterranean forests (literal)
- Abstract
- In this study, three different processing options for trees
yarded whole at the roadside in a beech thinning operation,
typical of the Italian Apennine mountain, were studied. Trees
were delimbed, crosscut, and stacked, respectively, by a fourman
crew equipped with chainsaws and a hydraulic loader
(motor-manual control thesis),by a small stroke harvester head
mounted on a light excavator, and by a dedicated 6-wheel harvester.
Under the conditions of the study, mechanized processing
was less expensive than the motor-manual control thesis,
regardless of the specific option. Cost reductions amounted to
27 percent and 38 percent, respectively, for the light processor
and the heavy harvester. Annual usage is a crucial factor for the
introduction of industrial mechanization: the heavy harvester
is preferable to motor-manual processing only when the annual
output exceeds 5,000 metric tonnes (t) per year.When this figure
grows above 13,000 tonnes per year, it will profitably replace
the light processor, not just for monetary gain, but for the
inability of the lighter unit to cope with such a heavy workload.
Onthe other hand, the light processorwas always less expensive
than the motor-manual control, while requiring an additional
investment of only (US),000. Therefore, the acquisition of a
light processor represents the most viable option, at least for
immediate deployment. Its productivity closely matches that of
the yarder, allowing for hot-deck (synchronic) operation.All of
the options can efficiently process beech trees within the full
range of diameters normally obtained from thinning operations,
and up to a 30 cm diameter at breast height. As expected,
productivity increases with tree size, and even more so for the
mechanical units,which normally handle just one or a few trees
at a time. Under the conditions of this study, both mechanized
options have a potential for bringing processing cost near
(US) per tonne, which is half the cost of traditional motormanual
processing. (literal)
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