Table 2.

Mean caliper 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 Caliper Increase (mm)
3 months6 months1 year2 years
-+-+-+-+
Fraxinus iatifoiia9 a6 b------32 a27 a83 a61 b
Ginkgo biloba2.0 a1.3 b2.6 a2.2 a3.5 a3.2 a9.1 a6.4 a
Lagerstroemia indica4.9 a4.3 a5.4 a5.9 a12 a10 a32 a23 a
Platanus racemosa7.0 a9.0 a------57 a36 b138 a82 b
Quercus agrifolia3.4 a3.1 a4.1 a5.0 a13 a12 a31 a22 b
Quercus lobata1.8a2.4 a2.1 a2.7 a16 a12 a44 a32 a
Sequoia sempervirens3.2 a1.6 b4.5 a5.2 a24 a12 b52 a36 b
  • 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.