United States Department of Agriculture
A red pine conversion planting was established on a cutover northern hardwood site in 1929. Competing hardwoods were conrolled on half the area by cleaning during the first 10 years after planting. After 46 growing seasons pine survival was 70 percent on the cleaned plot, and 25 percent on that not cleaned; mean annual increment was 2.37 cords(190 ft3), and .91 cords...
Methods are presented for estimating red pine site index from the height growth of red pine, site index of several associated species (jack pine, white pine, white spruce, or quaking aspen), and from easily measured soil properties. The restrictions and limitations of each method and their relative precision are discussed.
Within the crowns of red pine, Pinus resinosa Ait., trees, larvae of the cone insect, Dioryctria disclusa Heinrich, tended to follow the distributions of their foods. Between-tree distributions of larvae, however, were relatable to food distributions in only two of five years. Cone damage/tree by D. disclusa increased linearly with cone abundance per tree when insect...
Snowmelt overland flow was measured for one season from 10-year-old plantations of red pine, Norway spruce, European larch, and from old field control plots, on both north and south slopes. Pine and spruce plots produced more runoff than larch and old field plots; and south slope plots produced more runoff than north slope plots.
Changes in litter weight, soil bulk density, soil nitrogen and organic carbon contents, soil water depletion, and snowpack accumulation were evaluated over 14 years of plantation growth on three different sites. The species studied were white and red pines, white spruce, and European larch, along with unplanted controls.
Provides a means of assessing the impact of hardwood-pine conversions on water yield. Assembles many interception studies and applies them to evaluate net precipitation under red pine and aspen forests .