This
report describes a rapid appraisal technique for logged-over forests. A two-stage sampling design is
recommended with each sampling unit consisting of a cluster of five sample plots. The sampling
design also combines variable sampling plots for trees with diameters above 15
cm with circular fixed plots for smaller trees. For the variable (point)
sampling, a prism with a BAF of 4 is recommended based on the size and
distribution of trees within the stand. The main reason for adopting a
two-stage sampling design is that remote sensing data coupled with the use of
the Forest Canopy Density Model can be used for stratifying the forest. The
rapid inventory method proposed enables the forest manager to classify the forest by canopy density classes and
subsequently to obtain stock and stand reports for each class. The method is
practical and can be implemented easily by the field crew with minimal training and supervision.
Although
detailed inventory data were not available, the FCD classification combined
with ground truthing indicates that
the forests in the study area consist mainly of young regenerating trees. The year since the last
logging does not reflect adequately the readiness of the area to be re-logged.
Many areas will not regenerate sufficiently within the cutting cycle of 30
years without intensive silvicultural treatments to enhance the productivity
and growth environment.
