United States Department of Agriculture
A series of maps showing spruce budworm defoliation in Minnesota, 1954-1977
Describes a study of the nutritive quality and digestibility of ferilized and unfertilized tall fescue in spring, summer, and fall. The grass may be most valuable as food in early spring and late fall, and on unfertilized sites.
The occurrence of Phellinus (Fomes) igniarius white trunk rot in 45- to 50-year-old trembling aspen stands can be predicted by applying a constant to the stand basal area with P. igniarius conks to estimate the total basal area with P. igniarius rot. Future decay projections can be made by reapplying the basal area of hidden decay for each 6 years projected. This paper...
Natural seeding in a strip-cut black spruce bog was adequate, averaging 1,800 stems per acre and 80 percent milacre stocking. natural seeding in a completely cut bog was inadequate, averaging 630 stems per acre and 40 percent milacre stocking. Slash was removed to expose sphagnum seedbeds in both cases. Progressive cutting every other year is recommended.
This study examined the effect of clustering timber harvest zones and of changing the land use categories of zones (dynamic zoning) over varying temporal and spatial scales. Focusing on the Hoosier National Forest (HNF) in Indiana, USA as a study area, I used a timber harvest allocation model to simulate four management alternatives. In the static zoning alternative,...
Reviews status of Neotropical migratory landbirds, and effects of land-use practices in the Midwestern United States, from a landscape perspective, through a series of papers authored by regional experts. Includes recommendations for the conservation of Midwestern Neotropical migratory landbirds.
This bulletin reports findings of a survey of all primary wood-using mills in Iowa in 1994.
Discusses 1976 pulpwood production and receipts and recent production in the Lake States and Central States. Shows pulpwood production in the Lake States (Michigan, Minnesota, and Wisconsin) by species for each county and compares production by Forest Survey Unit with that of previous years. Presents 1976 pulpwood production and receipts data by state for the Central...
The fifth forest inventory of Michigan's forest reports 36.4 million acres of land, of which 19.3 million acres are forested. This bulletin presents statistical highlights and contains detailed tables of forest area, as well as timber volume, growth, removals, mortality, and biomass.
Missouri's third Forest Survey showed an 11% decline in commercial forest area between 1959 and 1972. Most of this land was converted to nonforest uses, primarily pasture. Of the land that remained classified as commercial forest, 75% underwent little or no treatment between surveys.
Revenues received from managing Minnesota county land increased at a slower rate than the expenses incurred in their management over the 1960-74 period. However, due to a substantial land sale program, the revenues received exceeded the expenses incurred throughout the period.
The third measurement of Iowa?s forests was completed in 1990 by the North Central Forest Experiment Station and the Iowa Department of Natural Resources (Brand and Walkowiak 1991). The inventory found that black walnut trees are common in the forests of Iowa. Two out of every hundred trees in the State are black walnuts. To accomplish the inventory, more than 12,769...
Production of high-quality hardwoods is important in Ohio and black walnut ranks as one of the most valuable tree species in the State along with cherry, white and red oak, and ash. Ohio has more walnut growing stock volume than any other state, according to the most recently completed forest inventories in the East. The fourth and most recent measurement of Ohio?s...
Describes some harvest options and their consequences in terms of timber investment return, water yield and quality, wildlife, visual quality, and disease and insect impact for the aspen, white birch, red pine, white pine, jack pine, black spruce, spruce-fir, and white-cedar forest types of the Lake States.
Investigates the effects of site preparation on tamarack regeneration. Site preparation treatments used were broadcast burning, full-tree skidding and full-tree skidding with subsequent burning. Reports the effects of these site preparations on distribution and quality of seedbed types as well as density and initial growth of seedlings.
Documents the forces required to delimb hardwoods as a functional of knife parameters, and identifies opportunities to reduce forces and increase productivity of machines using delimbing knives.
Site index curves based on stem analyses were computed for 13 species found in even-aged, second growth northern hardwood stands. These curves showed that most species had similarly-shaped height growth curves in early years, but after 40 years differences in both rate and pattern of growth between species was evident for trees growing on medium and good sites. Most...
New root and shoot growth of black walnut seedlings were strongly dependent on the amount of time they were kept at a cold temperature. Physiological dormancy ended after approximately 3,100 hours at 3C, but growth responses continued to increase after 4,600 hours. Root regeneration was strongly correlated with shoot growth.
Soil properties were related to infiltration rates as measured by single-ringsteady-head infiltometers. The properties showing strong simple correlations were identified. Regression models were developed to estimate infiltration rate from several soil properties. The best model gave fair agreement to measured rates at another location.
Three methods of measuring height growth in field plantings are compared.