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Worblaufeu-Bern, Switzerland : International Potash Institute, c2001.

Madison, Wis., Soil Science Society of America, 1973.

Boca Raton, Fla. : CRC Press, c1991.

by Jorgensen, Jacques R.
Asheville, N.C. : Southeastern Forest Experiment Station, 1985.

Series: General technical report (Southeastern Forest Experiment Station) ; SE-37

Wooster, Ohio Ohio Agricultural Research and Development Center, c1969.

by Ballard, T. M.
Victoria, B.C. : Forestry Canada, Pacific and Yukon Region, Pacific Forestry Centre, 1989.

Series: Information report (Pacific Forestry Centre) ; BC-X-309

by Schomaker, C. E.
Orono : Life Sciences and Agriculture Experiment Station, University of Maine, 1973.

Series: Technical bulletin (Life Sciences and Agriculture Experiment Station) ; 63

by Morrison, I. K. 1939-
Ottawa : Dept. of the Environment, Canadian Forestry Service, 1974.

Series: Publication (Canadian Forestry Service) ; no. 1343.

by Safford, Lawrence O.
Orono : Life Sciences and Agriculture Experiment Station, University of Maine, 1977.

Series: Bulletin (Life Sciences and Agriculture Experiment Station) ; 740

Washington, D.C. : U.S. Dept. of Agriculture, Forest Service, 1989-

Series: Agriculture handbook (United States. Department of Agriculture) ; no. 674.