This simple method of sampling will help make decisions about whether
a site has enough natural
regeneration for ANR.
-
During the initial survey of the area, set the
boundaries of the proposed ANR area.
-
Set two (2) straight parallel transect lines along the
area, not too close to the boundaries or to each other.
-
Allocate four (4) 10m x 25m plots equally spaced along
each line.
-
For each sample plot, record the number of seedlings of
each species in the tally sheet on the next page.
-
Convert number of seedlings per plot to number of
seedlings per hectare by multiplying by 40.
-
Average the results for each plot to get the average
number per hectare for all plots.
-
If some adjacent plots do not pass the test for ANR but
the average for the whole area passes the test (Section
5.2.2), consider
whether the area should be subdivided and ANR used only where there is
sufficient natural regeneration.
For good project monitoring and species and fertilizer trials,
someone with a good knowledge of statistics should help plan a better
sampling technique that takes into consideration (1) control plots,
(2) stratification of areas with different characteristics, and (3)
number of plots and plot size needed.
Tally sheet for inventory of natural
regeneration.
|