Difference between revisions of "Sample design"
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*'''When a satisfying stratification of the domain(s) has been obtained, the total number of sample stands are decided''' | *'''When a satisfying stratification of the domain(s) has been obtained, the total number of sample stands are decided''' | ||
| − | + | * Number of sample stands in current stratum) / Area of current stratum''. By dividing this estimation by the total area of the stratum an average value (here in m<sup>3</sup>/ha) is derived. Finally, the total volume of biomass in current stratum that is represented by the sample is derived by multiplying the average value-estimate by ''Representative area''. The only time this procedure is not followed is when a single stand show an area equal to or greater than the representative area - such stand will become a sample stand and represent its own area (nothing more, nothing less). | |
''NB: There should be at least three sample stands in each stratum. Moreover, aviod extreme differences in the representative area of different strata.'' | ''NB: There should be at least three sample stands in each stratum. Moreover, aviod extreme differences in the representative area of different strata.'' | ||