United States Department of Agriculture
A series of maps showing spruce budworm defoliation in Minnesota, 1954-1977
Describes how to build a housing for the balance used to weigh fuel moisture sticks. The housing is easy to build, low-cost, and can be mounted on the supports of the standard cotton region shelter.
Discusses case study results of debarking whole-tree aspen and red oak chips produced with a whole-tree chipper. The results indicate promise for successful bark removal after chipping and strengthen the argument for continued research.
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.
Oak-history forests on the poorest sites in the Upper Mississippi Valley have both low productivity and little esthetic appeal. A mixture of the native evergreen redcedar would add bearty and increase wildlife values.
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.
Describes a method for measuring pulpwood that involves photographing loads on trucks
Shows stocking density has little effect on wood specific gravity of red pine
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
Presents statistics on Minnesota's forest land area by country for 1977
Presents statistics on Minnesota's growing-stock and sawtimber volumes by county for 1977. Includes a map showing growing-stock volume classes by county.
Pulpwood production in the Lake States decreased from 9.6 million cords in 1995 to 9.5 million in 1996. Michigan, Minnesota, and Wisconsin pulpwood production is shown by county and species group.
Reports the results of a survey of operational prescribed burns in the Lake States during 1970.
This paper describes a computer program that calculates National Fire Danger Rating Indexes. fuel moisture, buildup index, and drying factor are also available. The program is written in FORTRAN and is usable on even the smallest compiler.
A tube-type gage is economical, easy to make, and is a reliable indicator of frost depth. Gage reading were within ? 5 centimeters of indicated true frost depth 95 percent of the time.
Gives guidelines for planting and tending poplar plantations as an agricultural crop, using intensive culture and 6- to 10- year rotations.
Oaks commercially treated with propiconazole on 29 sites in Minnesota in 1998 were evaluated for efficacy in controlling oak wilt. Root graft spread occurred in 39 percent of preventively treated red oaks over 5 years; spread in white oaks occurred only once. Propiconazole generally prevented further disease symptom development in white oaks.
Based on classifications of Landsat TM imagery, the total area of oak forests in the Minneapolis/St. Paul, Minnesota, metropolitan area decreased by 5.6 percent between 1991 and 1998, and oak forest losses ranged from 12 to 1,229 ha in six of seven ecological subsections. Maps and spatial data layers are provided.
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...