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Soil density and moisture content on two unused forest roads during first 30 months after construction / J.D. Helvey, J.N. Kochenderfer (Research paper NE ; 629)

Soil density and moisture content on two unused forest roads during first 30 months after construction / J.D. Helvey, J.N. Kochenderfer (Research paper NE ; 629)
Microform図書
1989<YCA-A 13.78:NE-629>
National Diet Library
  • Author HeadingHelvey, J. D Kochenderfer, J. N Northeaste...

Changes in water quality and climate after forest harvest in central Washington State / W.B. Fowler, T.D. Anderson, and J.D. Helvey (Research paper PNW ; RP-388)

Changes in water quality and climate after forest harvest in central Washington State / W.B. Fowler, T.D. Anderson, and J.D. Helvey (Research paper PNW ; RP-388)
Microform図書
1988<YCA-A 13.78:PNW-RP-388>
National Diet Library
  • Author Heading...Anderson, T. D Helvey, J. D Pacific Northwest Research St...

Some effects of grazing on soil and water in the eastern forest / J.H. Patric, J.D. Helvey (NE-GTR ; 115)

Some effects of grazing on soil and water in the eastern forest / J.H. Patric, J.D. Helvey (NE-GTR ; 115)
Microform図書
1986<YCA-A 13.42/28:NE-GTR-115>
National Diet Library
  • Author HeadingPatric, James H., 1922- Helvey, J. D Northeastern Forest Experimen...

Effects of a north central Washington wildfire on runoff and sediment production / J. D. Helvey

Effects of a north central Washington wildfire on runoff and sediment production / J. D. Helvey
Microform図書
1980<YCA-A 13.66/2:W 64>
National Diet Library
  • Author HeadingHelvey, J. D United States. Forest Service

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