Table \ref{882591} shows the correlations between the family means of the measured
wood properties while Table \ref{932043} shows the correlations at an individual
tree level. The analysis included trees grown from seed and coppice.
Acoustic velocity showed a good correlation with growth-strain at the
family level but was only moderate at the individual tree level. Dry
density showed moderate negative correlations with growth-strain.
Diameter showed poor correlations with wood properties. All predictors
were less strongly correlated with trees grown from coppice than trees
grown from seed (data not shown). Testing for all of these properties
can be conducted in less than five minutes per sample at trees as young
as one year old. This for the first time allows a sizable wood quality
improvement programme at reasonable cost.