Vegetation management by chemical and mechanical methods in aspen (Populus tremuloides)-dominated clearcuts: analysis of coniferous crop seedlings and selected competition variables. 1995. Strong, W.L.; Navratil, S.; Sidhu, S.S.; Thompson, J.M. Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, Edmonton, Alberta. Canada-Alberta Partnership Agreement in Forestry Report 128. 81 p.