J. D Helvey
Identifiers
- Open LibraryOL4301822A
Top Subjects
- Douglas-fir tussock moth (1)
- Defoliation (1)
- Runoff -- Oregon (1)
- Grasses -- Oregon (1)
- Lumbering -- Environmental aspects -- Oregon (1)
- Soil erosion -- Oregon (1)
- Floods -- Appalachian region (1)
Books by J. D Helvey
Total count: 5
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Effects of defoliation by Douglas-fir tussock moth on timing and quantity of streamflowDept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station1978-01-01
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Grass seeding and soil erosion in a steep, logged area in northeastern OregonDept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station1979-01-01
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Flood frequency and culvert sizes needed for small watersheds in the central AppalachiansU.S. Dept. of Agriculture, Forest Service1981-01-01
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Input-output budgets of selected nutrients on an experimental watershed near Parsons, West VirginiaU.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station1986-01-01
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Soil density and moisture content on two unused forest roads during first 30 months after constructionU.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station1989-01-01