Plantations can be classified into short- rotation and long-rotation plantations. Short- rotation plantations in Brazil are usually of Eucalyptus grown for pulpwood or charcoal, both with a time between cuttings of about six
years, while long-rotation plantations can be
either Eucalyptus or Pinus. Here Eucalyptus is
assumed on a 12 year cycle for use as sawlogs.
Parameters for carbon and economic calculations
for these and other options are given
in the Appendix. Changes in the stocks are
calculated explicitly for live components, while
dead biomass components (coarse litter, fine
litter and below-ground dead) and soil stocks
are assumed to be in equilibrium, thereby
exaggerating somewhat the dead biomass
components in the project calculations over the
time horizon considered. The time horizon is
taken to be the largest multiple of the time
between harvests up to 100 years. Using an
even multiple of this time (which includes both
replantings and coppices) makes the results
consistent with the procedures outlined in this
volume by Sathaye and coworkers.’