Table 3.

Correlations between depth of soundwood as determined from laboratory density determinations and depth of soundwood determined by the Resistograph and portable drill.

TestCorrelation coefficient (r)
ElmBlue gum
Resistograph 10.993***0.982***
Resistograph 20.975***0.977***
Drill 10.344ns0.729***
Drill 20.913***0.887***
Drill 30.972***0.930***
Drill 40.926***0.820***
  • ns not significant.

  • *** P < 0.001.