PT - JOURNAL ARTICLE AU - Thomas Smiley, E. AU - Calfee, Lisa AU - Fraedrich, Bruce R. AU - Smiley, Emma J. TI - Comparison of Structural and Noncompacted Soils for Trees Surrounded by Pavement AID - 10.48044/jauf.2006.022 DP - 2006 Jul 01 TA - Arboriculture & Urban Forestry (AUF) PG - 164--169 VI - 32 IP - 4 4099 - http://auf.isa-arbor.com/content/32/4/164.short 4100 - http://auf.isa-arbor.com/content/32/4/164.full AB - Trees in areas surrounded by pavement often have inhospitable rooting environments, which shorten their useful life expectancy. This trial was established to compare five different soil treatment options under pavement. Snowgoose cherry (Prunus serrulata) and Bosque lacebark elm (Ulmus parvifolia) were planted into 5.4 m3 (189 ft3) of medium containing compacted soil, gravel/soil mixture, Stalite, Stalite/soil mixture, or noncompacted soil and covered with concrete. A variety of growth and health parameters were measured after 14 months. It was found that there was more trunk diameter growth with the noncompacted treatment than the Stalite and Stalite/soil treatments; more twig growth in the noncompacted and gravel/soil treatments than all others; higher relative chlorophyll rating in the noncompacted treatment than all others; and more root growth in the noncompacted treatment (elms only). Suspended pavement over noncompacted soils provided the greatest amount of tree growth and health and should be considered when designing urban planting sites for trees.