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Table 6 Treatment level marginal means for the acoustic velocity measurements, obtained by the different tools for the different levels of final stand density and genetic rating treatments in the pruned and unpruned experiments

From: Effects of stand density and seedlot on three wood properties of young radiata pine grown at a dry-land site in New Zealand

Factor Factor level Pruned experiment marginal mean (km s −1 ) Unpruned experiment marginal mean (km s −1 )
ST-300 IML hammer HM-200 ST-300 IML hammer HM-200
Final stand density (stems ha−1) 100 2.447a (0.013) 1.901a (0.002) 1.883a (0.035) - - -
200 2.749b (0.006) 2.097b (0.003) 2.089b (0.008) 2.600a (0.024) 1.928a (0.038) 2.001a (0.007)
400 3.097c (0.028) 2.336c (0.020) 2.365c (0.020) 2.959b (0.004) 2.155a (0.031) 2.280b (0.026)
600 - - - 2.857b (0.050) 2.129a (0.054) 2.293b (0.071)
1000 - - - 2.831b (0.001) 2.118a (0.013) 2.341b (0.009)
Genetic rating GF6 2.748s (0.183) 2.104s (0.119) 2.097s (0.144) 2.820s (0.085) 2.097s (0.070) 2.252s (0.075)
GF25 2.780s (0.192) 2.118s (0.132) 2.128s (0.137) 2.804s (0.068) 2.067s (0.035) 2.205s (0.075)
  1. Note: The standard error of each mean is given in parentheses below each mean. Means in the same column, for a given factor, indicated by the same letter a, b, or c (for the stocking factor) and s and t (for the genetic rating factor) are not significantly different from each other at p = 0.05 using the Tukey honest significant difference p-value adjustment for multiple comparisons to maintain an experiment-wise error p-value of 0.05.