United States Department of Agriculture
Michigan's timber volumes increased about two-fifths since 1955 reaching 15.0 billion cubic feet of growing stock including 33.7 billion board feet of sawtimber-size material in 1966
Describes a dual-range strain gage transducer which has proven to be an excellent weight-sensing device for weighing trees and tree-length logs; discusses basic principals of the design and operation; and shows that a single transducer having two sensitivity ranges with automatic internal switching can sense weight with good repeatability and that one calibration curve...
Presents a computerized procedure for displaying forest type information from inventory plots. Although the development of general forest type maps in emphasized, the program can be used to display any locational data having rectangular coordinates
A computer program has been written in Fortran IV to calculate probability distributions of present worths of investments in timber production. Inputs can include both point and probabilistic estimates of future costs, prices, and yields. Distributions of rates of return can also be constructed.
Describes field techniques by which winter deer-browse production can be sampled with reasonable accuracy and moderate effort; and expedites the tabulation of the browse data. The method will be useful to both land managers and scientists doing research on the habitat of the white-tailed deer.
Fuel changes resulting from aerial herbicide application to control hardwoods competing with 13-year-old underplanted pine in Missouri are described. Fuel hazard is generally maximum about the fifth year after treatment and is affected by relative pine and hardwood densities.
This twenty-second annual report shows the Lake States pulpwood harvest decreased to about 4 million cords from a record high of 4 1/2 million cords in 1966. Pulpwood receipts remained high in Wisconsin but decreased in Michigan and Minnesota. Minnesota shipped 106,000 cords more to Wisconsin than in 1966. As a result, only Minnesota's 1967 pulpwood production...
Presents a shortcut method of predicting sugar maple tree yields by saw log grade from d.b.h. and butt log grade.
Banks are stabilized to protect adjacent high-value items such as cabins and campgrounds, or to reduce reservoir or lake sedimentation rates. Also, bank stabilization is undertaken as one part of fish habitat improvement programs. Rock rip-rap is the best material for bank stabilization in most cases. It does not deteriorate with time and it blends in well with the...
The report presents statistics on area, volume, growth, mortality, and timber use. Projections of expected timber volumes 30 years in the future are also presented. These data are discussed with regard to possible future development and use of the state's woodlands.
A system for classifying wood-using industries and recording pertinent statistics for automatic data processing is described. Forms and coding instructions for recording data of primary processing plants are included.
Presents 11 papers concerning recent research in forest genetics, physiology, and allied fields. Species discussed include red pine, jack pine, Scotch pine, black spruce, larch, yellow birch, sugar maple, silver maple, cottonwood, and walnut.
Indiana's 480 active sawmills received 232 million board feet of saw logs in 1966. More than one-quarter was red oak. Eighty-six of these mills each sawed more than one-million board feet. Of 1,100 mills active in 1949, only 30 sawed this much. Sixteen counties each produced more than 5 million board feet and collectively accounted for 47 percent of the lumber...
Studies of regeneration 2, 5, and 10 years after cutting mature and overmature sugar maple stands to several residual densities show that (1) sugar maple is still the predominant species under all stand densities (2) nearly all regeneration reaching larger size classes became established before cutting (3) heavier cuttings (30, 50, and 70 square feet) are more rapidly...
Jack pine can be regenerated on mineral soil seedbeds by scattering cone-bearing branches or repellent-treated seed. On some areas where competition develops, the seedlings may need to be released between the third and fifth years.
Most of the lumber produced in northern Minnesota is marketed in Minnesota, and the marketing area increases as mill size increases. Aspen is a dominant species. About 45 percent of the lumber is graded; concentration and grading would improve marketing. Less than one-third of the by-products are marketed
To prevent blister rust infections in Eastern white pine seedlings, the antibiotics, cycloheximide (acti-dione) and Phytoactin, were tested in root dips, root slurries, and foliar drenches before planting and after planting the trees. None of the methods and materials tested was effective.
Second-year cone crops in red pine seed-production areas have been severely damaged by five species of insects. Control of the two most destructive pests could increase present seed yields in most areas by at least 50 percent. Some seed-production areas may not produce harvestable seed crops until cone-insect populations are suppressed.
Five winter-cut northern species were chipped in a frozen and unfrozen condition with a parallel knife chipper. The degree of bark separation during chipping and a relative gradation of chip size are reported.
Size of aspen crop trees at age 15 years is essentially the same for a wide range of initial sucker densities. High densities are not necessary to produce adequately stocked stands.