. Container-grown ponderosa pine seedlings outperform bareroot seedlings on harsh sites in southern Utah. Ponderosa pine Seedlings; Ponderosa pine Seedlings, Bareroot. Table 4—Mean root index of trees on each site for both treatments and each of three root zones. Larger numbers represent more extensive root system coverage. See text for explanation. Values followed by the same letter are not significantly different (a = ). Mean com- parison methods according to Gabriel (1978) Site and Zone 1 Zone 2 Zone 3 Zones 1+2 + 3 treatment (0-4 inches) (4-8 inches) (8-12 inches) (0-12 inches) Allen's
. Container-grown ponderosa pine seedlings outperform bareroot seedlings on harsh sites in southern Utah. Ponderosa pine Seedlings; Ponderosa pine Seedlings, Bareroot. Table 4—Mean root index of trees on each site for both treatments and each of three root zones. Larger numbers represent more extensive root system coverage. See text for explanation. Values followed by the same letter are not significantly different (a = ). Mean com- parison methods according to Gabriel (1978) Site and Zone 1 Zone 2 Zone 3 Zones 1+2 + 3 treatment (0-4 inches) (4-8 inches) (8-12 inches) (0-12 inches) Allen's Canyon ab b ab Dave's Hollow a ab be Mammoth Cave b a a Mammoth Creek Road a ab ab Wilson Peak ab b c Bareroot Containerized WStf-Li * Figure 3—After five growing seasons on the Allen's Canyon site, few signs of site preparation are evident. The trees are still too small to be conspicuous from a distance. The photo was taken in September 1985. terminal bud damage from shoot borers. Of all trees sur- viving after the fifth growing season, 57 and 58 percent showed signs of insect damage, respectively. Mammoth Creek Road and Allen's Canyon sites had about half the leader damage of Mammoth Cave and Wilson Peak (26 percent); Dave's Hollow was intermediate, with 40 percent of live trees infected. Figure 3 shows how the study site near Allen's Canyon looked in September of 1985, five growing seasons after planting. Most of the vegetation had recovered to prestudy condition. DISCUSSION Survival and growth of the ponderosa pine stock dif- fered considerably between sites. Figure 4 compares the yearly survival and height growth of bareroot and con- tainerized stock for all five sites. The order is from best overall performance (top graphs—Mammoth Cave site) to the poorest (bottom graphs—Dave's Hollow site). After 5 years on the Mammoth Cave site whe
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