The Online Books Page

Books by Frank C. Sorensen:

Books in the extended shelves:

• Sorensen, Frank C.: Effects of stratification and temperature on seed germination speed and uniformity in central Oregon ponderosa pine (Pinus ponderosa Dougl. ex Laws.) (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1990), also by John C. Weber (page images at HathiTrust)
• Sorensen, Frank C.: Genetic variation and seed transfer guidelines for lodgepole pine in Central Oregon (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1992), also by Or.) Pacific Northwest Research Station (Portland (page images at HathiTrust)
• Sorensen, Frank C.: Genetic variation and seed transfer guidelines for ponderosa pine in central Oregon (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1994), also by Or.) Pacific Northwest Research Station (Portland (page images at HathiTrust)
• Sorensen, Frank C.: Genetic variation and seed transfer guidelines for ponderosa pine in the Ochoco and Malheur National Forests of central Oregon (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1994), also by John C. Weber and Or.) Pacific Northwest Research Station (Portland (page images at HathiTrust)
• Sorensen, Frank C.: Genetic variation in rootability of cuttings from one-year-old western hemlock seedlings (Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1980), also by Robert Kenneth Campbell, United States Forest Service, and Or.) Pacific Northwest Forest and Range Experiment Station (Portland (page images at HathiTrust)
• Sorensen, Frank C.: Performance of wind-pollination families and intra- and inter-stand crosses on contrasting forest soils (Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1973) (page images at HathiTrust)
• Sorensen, Frank C.: The seed orchard tree as a pollen sampler : a model and example (Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1972) (page images at HathiTrust)
• Sorensen, Frank C.: Self-fertility of a central Oregon source of Ponderosa pine (Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1970) (page images at HathiTrust)
• Sorensen, Frank C.: Stratification period and germination of douglas-fir seed from Oregon seed orchards: two case studies (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest Research Station, 1991), also by Or.) Pacific Northwest Research Station (Portland (page images at HathiTrust)
• Sorensen, Frank C.: Stratification requirements for germination of western larch (Larix occidentalis Nutt.) seed (U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest Research Station, 1990), also by Or.) Pacific Northwest Research Station (Portland (page images at HathiTrust)

Find more by Frank C. Sorensen at your library, or elsewhere.