United States Department of Agriculture
The fourth inventory of Michigan's forest resources shows a 27 percent increase in growing-stock volume between 1966 and 1980, from 15.0 to 19.1 billion cubic feet.
Describes and illustrates a technique to mail and store diseased leaf samples to prevent deterioration or damaage.
Traces the history of USDA Forest Service fire reports, examines the most recent report, Form 5100-29, and discusses the reliability of information recorded on the 5100-29, factors influencing data accuracy, and reactions of the Ranger District personnel to wildfire reporting.
Compares effeects of various wee-control methods, including hericides, cultivation, and legume cover crop, on tree survival and height growth of 2-year-old hybrid poplars. Cultivation and herbicides singly or in combination gave consistently better results than the other treatment tested.
Describes the financial performance of red pine on site index 60, 70, and 80 lands by using new yield evidence and up-to-date cost and revenue assumptions. Best combinations of initial stocking, residual basal area after thinning, an rotation age are identified for two different financial criteria: soil expectation value and internal rate of return.
Herbicides of 17 different rates and formulations were oversprayed on newly planted 1-0 European larch seedlings in teh spring of 1983 at the recommended rates. Simazine, bifenox, oxyfluorfen, promamide, and oryzalin provided adequate weed control with no damage to the larch. Height growth at the end of the first growing season was one-and-a-half times greater in the...
Presents Wisconsin timber resource statistics that were updated by the tree growth projection subsystem of the Forest Resources Evaluation Program (FREP).
Describes and presents the results of performance testing for an experimental machine that produces chunky wood particles. These wood chunks can be used by the flakeboard industry or as energy wood.
Species coefficients are reported for predicting individual tree survival for nine Lake States species, supplementing a previous report for 10 species. Tree attributes are diameter growth rate and diameter at breast height. Regional and local performances are summarized.
In 1981 wooded strips and windbreaks in Kansas coverd 336,000 acres and were more than 54,000 miles long. Wooded strips contained 300 million board feet of sawtimber and 92 million cubic feet of growing stock.
Two study sites in central Missouri oak-hickory forests were searched for nest sites of cavity nesting birds. Researchers located and measured 133 nests of 11 species. Cavity nesting bird habitat selection is affected by both snag characteristics and vegetation structure.
Tests the feasibility and economics of compacting hardwood tops with a prototype shearing and bunching device prior to skidding. Presents productivity levels and costs associated with compacting, skidding, and chipping hardwood tops.
Presents a growth and yield model for the elm-ash-cottonwood forest type in Indiana and discusses model validity. Gives simulated yield estimates for a wide range of stand conditions.
Provides estimates of biomass (pounds/acre) for tall shrub species in 53 conifer plantations in northeastern Minnesota. The estimates are analyzed by plantation age and silvicultural practices used to establish and release the plantations.
Analyzes the cost and productivity of roller chopping in preparing a cutover aspen stand for conifer conversion (1.55 acres/hour at $43/acre).
Equations are presented that predict diameter inside and outside bark for tree boles below 4.5 feet given d.b.h. These equations are modified and integrated to estimate stump volume. Parameters are presented for 22 Lake States species groups.
Methods for calculating tree biomass are outlined, and the biomass on commercial forest land is estimated for 11 north-central states. Tree biomass in the North Central Region totals 3.6 billion tons, or 50 tons per commercial forest acre. For all species, total tree biomass is concentrated in growing-stock boles.
Describes the susceptibility to insect and disease pests of jack pine grown in three Minnesota plantations from seed collected in Minnesota, Wisconsin, and Michigan.
Projected softwood shortages and high costs of mechanized tree planting indicate that more efficient planting equipment and systems are needed. This paper presents cost and productivity data for mechanically planting red pine seelings on a site previously occupied by hardwoods in northern Wisconsin
Compares rates of forest floor decomposition and nutrient turnover in aspen and conifers. These rates were generally most rapid under aspen, slowest under spruce, and more rapid on a loamy fine sand than on a very fine sandy loam. Compares results with literature values.