خيارات البحث
النتائج 181 - 190 من 267
Nutritional disturbances and histological changes in declining forests
1989
Zoettl, H.W. (Albert-Ludwigs-University, Freiburg im Breisgau (Germany). Inst. of Soil Science and Forest Nutrition) | Huettl, R.F. | Fink, S. | Tomlinson, G.H. | Wisniewski, J.
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.
Forest decline in the boreal montane ecosystems of the southern Appalachian mountains
1989
Bruck, R.I. (North Carolina State Univ., Raleigh, NC (USA). Dept. of Plant Pathology) | Robarge, W.P. | McDaniel, A.
Acid fog and ozone: their possible role in birch deterioration around the Bay of Fundy, Canada
1989
Cox, R.M. (Forestry Canada, Fredericton, N.B. (Canada). Maritimes Region) | Spavold-Tims, J. | Hughes, R.N.
Changes in foliar elements in red spruce seedlings after exposure to sulfuric and nitric acid mist
1989
Jacobson, J.S. (Boyce Thompson Inst. for Plant Research, Ithaca, NY (USA)) | Lassoie, J.P. | Osmeloski, J. | Yamada, K.
Role of air pollution in forest decline in eastern North America
1989
Johnson, D.W. (Nevada Univ., Reno, NV (USA). Dept. of Range, Wildlife and Forestry) | Taylor, G.E.
Potential hazards of lime application in a damaged pine forest ecosystem in Berlin, Germany
1989
Marschner, B. (Technical Univ. Berlin (Germany). Dept. of Soil Science) | Stahr, K. | Renger, M.
Cycling of mercury between water, air, and soil compartments of the environment
1989
Schroeder, W.H. (Atmospheric Environment Service, Downsview, Ont. (Canada)) | Munthe, J. | Lindqvist, O.
Nutrient cycling in adirondack conifer plantations: is acidic deposition an influencing factor?
1989
Nowak, C.A. (State Univ. of New York, Syracuse, NY (USA). Coll. of Environmental Science and Forestry) | Shepard, J.P. | Downard, R.B. | White, E.H. | Raynal, D.J. | Mitchell, M.J.
Metals in sediment of lakes in northern Sweden
1989
Johansson, K. (National Environmental Protection Board, Solna (Sweden). Research and Development Dept.)
