J. D. Helvey

Identifiers

Open LibraryOL4842670A

Top Subjects

Douglas-fir tussock moth (1)
Defoliation (1)
Runoff -- Oregon (1)
Grasses -- Oregon (1)
Lumbering -- Environmental aspects -- Oregon (1)
Soil erosion -- Oregon (1)
Runoff -- Washington (State) (1)

Books by J. D. Helvey

Total count: 5

Effects of defoliation by Douglas-fir tussock moth on timing and quantity of streamflow

Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station1978-01-01
Grass seeding and soil erosion in a steep, logged area in northeastern Oregon

Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station1979-01-01
Effects of a north central Washington wildfire on runoff and sediment production

USDA Forest Service1980-01-01
Flood frequency and culvert sizes needed for small watersheds in the central Appalachians

U.S. Dept. of Agriculture, Forest Service1981-01-01
Input-output budgets of selected nutrients on an experimental watershed near Parsons, West Virginia

U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station1986-01-01