Preliminary comparisons of herbicides and application procedures to promote size of advanced oak and yellow-poplar reproduction after harvestThis article is part of a larger document. View the larger document here.
The repetitious use of diameter-limit harvesting in upland hardwoods has led to low-valued stands with heavy midstory and understory canopy layers containing mostly shade-tolerant species. Limited documentation is available on the means to successfully regenerate these impoverished areas into stands of more desirable, shade-intolerant species. The objective of this study is to evaluate the effectiveness of various herbicides and application methods to accelerate the growth (size) of small natural oak (Quercus spp.) and yellow-poplar (Liriodendron tulipifera) reproduction after harvest that otherwise would probably be outgrown by other undesirable species. The study area is in west-central Tennessee on the Western Highland Rim on nonindustrial forest land that has been cutover several times. Site index is 70 to 75 feet for upland oaks at 50 years, typical of many upland hardwood sites. Three 10-acre harvest blocks, each containing the following six treatments were established: banded foliar spray, banded foliar spray plus pre-emergent broadcast spray, radial release spray, radial release plus pre-emergent broadcast spray, pre-emergent broadcast spray only, and untreated control. Individual oak and poplar seedlings were measured after treatment applications in the fall of 2014 and again in January/February of 2017. Initial findings after two complete growing seasons indicate there was no difference in the natural reproduction growth response between treatments