Table 3. Percent increase of fine roots above 15 cm depth (Including mulch) compared to grass treatment.
SpeciesBare soilMulch
Red maple0172*
Norway maple1690*
Sugar maple113*195*
Green ash38128*
Pin oak251
Red oak-8  6
Linden34127*

  • ↵* Significant increase (5% level) in tree root density over grass treatment using one-way analysis of variance with separation of means using the Student-Newman-Keuls procedure.