The Online Books Page

Books by J. D. Helvey:

Books in the extended shelves:

• Helvey, J. D.: Baseline climatic and hydrologic relationships for the high ridge evaluation area (Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1979), also by W. B. Fowler, C. Johnson, United States Forest Service, and Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Helvey, J. D.: Changes in thermal regime after prescribed burning and select tree removal (Grass Camp, 1975) (Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1978), also by W. B. Fowler, United States Forest Service, and Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Helvey, J. D.: Changes in water quality and climate after forest harvest in central Washington State (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1988), also by W. B. Fowler, T. D. Anderson, and Or.) Pacific Northwest Research Station (Portland (page images at HathiTrust)
• Helvey, J. D.: Climate and hydrology of the Entiat Experimental Forest watersheds under virgin forest cover (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1976), also by Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Helvey, J. D.: 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 Station, 1978), also by Arthur R. Tiedemann, United States Forest Service, and Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Helvey, J. D.: Flood frequency and culvert sizes needed for small watersheds in the central Appalachians (U.S. Dept. of Agriculture, Forest Service, 1981), also by United States Forest Service (page images at HathiTrust)
• Helvey, J. D.: Grass seeding and soil erosion in a steep, logged area in northeastern Oregon (Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1979), also by W. B. Fowler, United States Forest Service, and Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Helvey, J. D.: Hydrologic and climatic changes in three small watersheds after timber harvest (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station ;, 1987), also by W. B. Fowler, E. N. Felix, and Or.) Pacific Northwest Research Station (Portland (page images at HathiTrust)
• Helvey, J. D.: Input-output budgets of selected nutrients on an experimental watershed near Parsons, West Virginia (U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1986), also by S. H. Kunkle and Pa.) Northeastern Forest Experiment Station (Radnor (page images at HathiTrust)
• Helvey, J. D.: Rainfall interception by hardwood forest litter in the southern Appalachians (U.S. Dept. of Agriculture, Forest Service, Southeastern Forest Experiment Station, 1964) (page images at HathiTrust)
• Helvey, J. D.: Soil and air temperature and biomass after residue treatment (U.S. Dept. of Agriculture, Forst Service, Pacific Northwest Forest and Range Experiment Station, 1981), also by W. B. Fowler and Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Helvey, J. D.: Soil density and moisture content on two unused forest roads during first 30 months after construction (U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1989), also by J. N. Kochenderfer and Pa.) Northeastern Forest Experiment Station (Radnor (page images at HathiTrust)
• Helvey, J. D.: Soil moisture depletion and growth rates after thinning ponderosa pine. (Pacific Northwest Forest and Range Experiment Station, 1975) (page images at HathiTrust)
• Helvey, J. D.: Some effects of grazing on soil and water in the eastern forest (U.S. Dept. of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1986), also by James H. Patric and Pa.) Northeastern Forest Experiment Station (Radnor (page images at HathiTrust)

Find more by J. D. Helvey at your library, or elsewhere.