The starting point in the planning of sampling and measurements is to identify the major sources of property variations in the region of interest. This may differ between regions. Then stands reflecting these differences are identified and characterised, as well as trees within the stand representing different growth rates. Samples are taken from these trees and radial property variations are determined in the Wood and Fibre Measurement Centre. All data on properties of stands, trees, wood and fibres are compiled into a database of standardised structure.
Thanks to compatible structures, databases on different regions, species, etc may be conbined, offering large synergy effects in evaluation of differences and similarities, modelling.

Illustration of database from sampling and measurements on Loblolly pine (Pinus taeda) in the US, including data from different regions, types of stands, sizes of trees, heights in trees and radial positions.