Skip to main content
U.S. flag

An official website of the United States government

59,220 results found
Climate change, with warming temperatures and shifting precipitation patterns, may increase natural-caused forest fire activity. Increasing natural-caused fires throughout western United States national forests could place people, property, and infrastructure at risk in the future. We used the fine…
Author(s): Hadi Heidari, Mazdak Arabi, Travis Warziniack
Keywords: national forests, climate change, wildfire, warming temperature
Source: Atmosphere
Year: 2021
We detected Heartland virus (HRTV) in lone star nymphs collected in 2018 in northern Alabama, USA. Real-time reverse transcription PCR selective for the small segment of the HRTV genome and confirmatory sequencing of positive samples showed high identity with HRTV strains sequenced from Tennessee…
Author(s): Brent C. Newman, William B. Sutton, Abelardo C. Moncayo, Holly R. Hughes, Ali Taheri, Thomas C. Moore, Callie J. Schweitzer, Yong Wang
Keywords: HRTV, Heartland virus
Source: Emerging Infectious Diseases
Year: 2020
Presents site-index comparisons for the following forest species in northern Minnesota: quaking aspen, paper birch, basswood, red oak, black ash, jack pine, red pine, white pine, white spruce, black spruce, balsam fir, white-cedar, and tamarack. Shows site-index relationships among these species…
Author(s): Willard H. Carmean, Alexander Vasilevsky
Keywords: site-index ratios, species-comparison graphs, quaking aspen, paper birch, basswood, red oak, black ash, jack pine, red pine, white pine, white spruce, black spruce, balsam fir, white-cedar, tamarack
Source: Research Paper NC-65. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1971
Black walnut seedlings grown in a clay loam and sandy soil were subjected to two soil moisture regimes and three fertility levels. Fertilization increased growth only under most conditions. Under draught, fertilization retarded growth in the sand. Nitrogen was the element primarily responsible…
Author(s): Richard E. Dickson
Keywords: Juglans nigra, black walnut, water regimes, fertilizers, osmotic effects, clay loam, sandy soil, water-fertilizer-soil interactions
Source: Research Paper NC-66. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1971
Reports research at the Forest Genetics Institute in Rhinelander, Wisconsin, since its beginning in 1957. Describes the physical plant, study objectives, and work program. The latter includes studies of seed source, inheritance in white spruce, disease and insect resistance, interspecific…
Author(s): Richard M. Jeffers
Keywords: forest genetics research, tree improvement, Lake States region
Source: Research Paper NC-67. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1971
Discusses results of study on crosscut shearing of aspen, basswood, spruce, hard maple, and yellow birch with numerous shear blade and anvil designs. Also includes effect of temperature, coated shear blades, dulling, wood properties, and very thin shear blades on force and splitting damage.
Author(s): Rodger A. Arola
Keywords: blades, anvils, dulling, wood properties, temperature, coatings
Source: Research Paper NC-68. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1971
Compares storm flow from upland fields with outflow at the bottom of wooded slopes below. In general, larger upland flows produced larger lower station flows. Lower station flow as a percentage of upland runoff for large storms ranged from 56 to 94.
Author(s): Richard S. Sartz
Keywords: storm runoff, sediment yield, agricultural watersheds, forest watersheds, hydrographs, upstream
Source: Research Paper NC-69. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1971
A supplement to Research Paper NC-9 published in 1966, this list covers 208 additional references dealing with the growth and production of walnut.
Author(s): Martha K. Dillow, Norman L. Hawker
Keywords: bibliography, walnut, Juglans nigra
Source: Research Paper NC-70. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1971
This paper examines the factors that lead to the genesis of fire whirlwinds over flat terrain. Also presented is an estimate of the number of days one might expect to encounter meteorological conditions that permit such formations.
Author(s): Donald A. Haines, Gerald H. Updike
Keywords: burning, vortex, whirls, atmospheric stability, fire control
Source: Research Paper NC-71. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1971
Analyzes trends in the hardwood veneer and plywood industry of Michigan and Wisconsin between 1964 and 1969. In that period, red oak and hard maple replaced yellow birch as the major species used. Log supplies were adequate. Wall paneling was the major end market with doorskins next. Excess…
Author(s): Gary R. Lindell, Lewis T. Hendricks
Keywords: markets, veneer logs, capacity utilization, equipment
Source: Research Paper NC-72. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
Year: 1972
https://www.fs.usda.gov/treesearch/search/query