خيارات البحث
النتائج 1 - 9 من 9
Relationship between sugar maple decline and corresponding chemical changes in the stem tissue
1997
Mohamed, H.K. (Toronto Univ., Toronto, Ont. (Canada). Faculty of Forestry) | Pathak, S. | Roy, D.N. | Hutchinson, T.C. | McLaughlin, D.L. | Kinch, J.C.
Ecological-genetic investigations in environmentally stressed mature sugar maple (Acer saccharum Marsh.) populations
1992
Geburek, T. (Lakehead Univ., Thunder Bay, Ont. (Canada). School of Forestry) | Knowles, P.
Simulation of solution chemistry in an acidic forest soil
1991
Hendershot, W. (McGill Univ., Ste-Anne-de-Bellevue, QC (Canada). Macdonald Coll., Dept. of Renewable Resources) | Courchesne, F.
Environmental pollution and impacts on soils and forests nutrition in North America
1990
Johnson, D.W. (Biological Sciences Center, Reno, NV (USA). Desert Research Inst.) | Ball, J.T.
Trace elements distribution within the tree phytomass and forest floor of a tolerant hardwood stand, Algoma, Ontario
1986
Morrison, I.K. (Canadian Forestry Service, Sault Ste Marie, Ont. (Canada)) | Hogan, G.D.
Principal forest dieback episodes in Northern Hardwoods: development of numeric indices of areal extent and severity
1997
Auclair, A.N.D. (Science and Policy Associates Inc., Washington, DC (USA).) | Eglinton, P.D. | Minnemeyer, S.L.
Aluminium toxicity in forests exposed to acidic deposition: the ALBIOS results
1989
Cronan, C.S. (Maine Univ., Orono, ME (USA). Dept. of Botany) | April, R. | Bartlett, R.J. | Bloom, P.R. | Driscoll, C.T. | Gherini, S.A. | Henderson, G.S. | Joslin, J.D. | Kelly, J.M. | Newton, R.M. | Parnell, R.A. | Patterson, H.H. | Raynal, D.J. | Schaedle, M. | Schofield, C.L. | Sucoff, E.I. | Tepper, H.B. | Thornton, F.C.
Sources of acidity in forest-floor percolate from a maple-birch ecosystem
1989
Hazlett, P.W. (Forestry Canada Ontario Region, Sault Ste. Marie, Ont. (Canada). Great Lakes Forestry Centre) | Foster, N.W.
Natural stresses, nutrient imbalances and forest decline in southeastern Quebec
1989
Bernier, B. (Laval Univ., Quebec City, Qc. (Canada). Dept. of Forest Sciences) | Pare, D. | Brazeau, M.
