Table 1.

Mean height increases of seven tree species over time growing with (+) and without (-) treeshelters, (n=8 for 3- and 6-month data, n=20 for 1-year data, n=10 for 2-year data)

SpeciesMean Height increase (cm)
3 months6 months1 year2 years
-+-+-+-+
Fraxinus latifolia27 b44 a--------162 a197 a238 a233 a
Ginkgo biloba0 a0.3 a1.5 a4.4 a13 a18 a34 a51 a
Lagerstroemia indica27 b76 a30 b76 a30 b137 a98 b160 a
Platanus racemosa38 b64 a--------134 a173 a330 a308 a
Quercus agrifolia16 b51 a27 b78 a57 b144 a172 a191 a
Quercus lobata9 b31 a19b53 a71 b200 a233 a261 a
Sequoia sempervirens11 b25 a12 b38 a85 a68 a123 b213 a
  • Values followed by the same letter for each time period are not significantly different from one another at p=0.05 using Scheffe’s multiple separation procedure.