United States Department of Agriculture
A 6-year exposure test of three styles of siding made from nine hardwoods and given three treatments showed that full-length yellow-poplar vertical tongue-and-groove siding dip-treated in a water-repellent preservative performed best.
In a plantation of four hardwood species on a silt loam soil planted to 1-0 stock, 4 pounds of active atrazine or simazine controlled weeds effectively without injuring the trees. Chemical weed control was better on plowed and disked ground than on unprepared ground. Yellow-poplar and white ash grew faster on prepared ground. Black walnut and red oak did not respond...
Gives the average rates of perimeter increase for fires in four broad fuel type groups by four spread index classes.
Presents 1966 forest type areas by counties and shows trends in forest type areas since 1955, by survey units.
Shows lumber production by species in three Survey Districts of northern Minnesota and by country for softwoods, aspen, and other hardwoods. Compares lumber production in 1960 with 1965
Springflow and ground water levels both rose with winter thaws, even when the ground was frozen. A high soil water content suggests that water moved to the water table through a continuous column of soil water rather than as a wetting front
A pilot study in three northern Minnesota spruce-fir stands showed that as cutting intensity increased, defoliation by the spruce budworm decreased. Commercial clear cutting reduced defoliation most.
Culverts too small in diameter or poorly placed were major causes of timber flooding and tree damage. Placement problems were poor culvert slope, poor hydraulic approach, lack of gravel bedding, and too little soil covering the culverts.
ABSTRACT. -- A computer program written in FORTRAN has been designed to summarize data. Class frequencies, means, and standard deviations are printed for as many as 100 independent variables. Cross-classifications of an observed dependent variable and of a dependent variable predicted by a multiple regression equation can also be generated.
In 1966, Michigan had 19.4 million acres of forest land. Almost half of the 18.9 million acres classified as commercial forest land was in Upper Michigan. Since 1955 commercial forest land has increased from 2.4 million to 2.8 million acres in Southern Lower Michigan, and decreased from 7.7 million to 7.0 million acres in Northern Lower Michigan.
Tests of streambank erosion control measures on three Michigan streams have shown the key role of waterline stabilization. After undercutting was stopped, the upper banks were revegetated in 1 to 5 years depending on treatment. Without waterline control, all revegetation efforts were ineffective.
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,...
Prescribed burning to prepare a seed-bed, seedling native grasses or fescue on proper sites, and fertilizing are all necessary for successfully establishing good grass production where trees have been killed by aerially applied berbicides.
Most of the intensive grazing on forested land in the Missouri Ozarks is occuring on land with a low potential for growing commercial timber.
Presents stand volume equations and a stand volume table for shortleaf pine in Missouri and describes their development and application.
Nursery seedbed density of 3-0 green ash, which ranged from 4 to 36 trees per square foot at Carlos Avery Nursery, Forest Lake, Minn., had a marked effect on caliper, height, fresh weight, and percent and amound of plantable stock. The highest number of good-quality trees was produced at a density of 12.5 trees per square foot.
Six herbicide mixtures were sprayed directly on broadleaf weeds and grasses competing with black walnut trees. Mixtures of papquat (1/2 lb/acre) with simazine (4 lb/acre) or atrazine (4 lb/acre), and amitrole (2 lb/acre) plus simazine (4 lb/acre) gave satisfactory weed control which resulted in significantly better tree height and diameter growth.
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.
Summarizes information on wood properties and uses of quaking aspen from recent literature. Includes current data on the growth and production of aspen in the Lake States. Outlines additional research needs concerning aspen wood properties and uses.
This bulletin reports findings of a survey of all primary wood-using mills in Iowa in 1994.