Refine search
Results 1-10 of 11
Soil solution nitrogen and cations influenced by (NH4(2)SO4) deposition in a coniferous forest
1997
Carnol, M. | Ineson, P. | Dickinson, A.L. (University of Liege, Dept. Botany B22, Microbial Ecology and Radioecology, 4000 Liege (Belgium))
Air pollution status of the Bulgarian Govedartsi ecosystem
1997
Zeller, K. | Donev, E. | Bojinov, H. | Nikolov, N. (Rocky Mountain Forest and Range Experiment Station, USDA Forest Service, Ft. Collins, CO (USA))
Crown condition of Norway spruce in relation to sulphur and nitrogen deposition and soil properties in southeast Norway
1997
Solberg, S. | Toerseth, K. (Norwegian Forest Research Institute, Hoegskoleveien 12, N-1432 As (Norway))
Polish mountain forests: past, present and future
1997
Grodzinska, K. | Szarek-Lukaszewska, G. (W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, 31-512 Krakow (Poland))
Forest health and environmental pollution in Slovakia
1997
Oszlanyi, J. (Institute of Landscape Ecology, Slovak Academy of Sciences, PO Box 254 Stefanikova St., No. 3, 814 99 Bratislava (Slovak Republic))
The synergism between SO2 oxidation and manganese leaching on spruce needles - a chamber experiment
1997
Burkhardt, J. | Drechsel, P. (Department of Agroecology, University of Bayreuth, D-95440 Bayreuth (Germany))
Pigment changes in norway spruce induced by dust pollution
1997
MANDRE, MALLE | TUULMETS, LIIVI
The influence of alkaline dust pollution (pH of water solution of dust 12.3–12.7) from a cement plant (Kunda town, Estonia) on chlorophylls and carotenoids of the needles of 60–80 year old Norway spruce was studied on sample plots established at different distances from the emission source. The highest sensitivity to dust impact was measured in the content of Chl a, Chl b, carotenoids and elements regulating or participating in the biosynthesis of pigments (Mg, Fe, N, Mn).
Show more [+] Less [-]The accumulation of arsenic, bromine and iodine in needles of Norway Spruce (Picea Abies [L.] karst.) At sites with low pollution
1997
Wyttenbach, A. | Bajo, S. | Furrer, V. | Langenauer, M. | Tobler, L.
The concentrations of As, Br and I were measured in needles, in the material deposited on the needle surface and in the soil. Results from 8 unpolluted and one polluted continental sites and from one maritime site are reported. The mass of al13 elements on the needle surface is similar to that in the needles. Needle concentrations increase linearly with the needle age class, but net accumulation during the first year is larger than during later years. There are significant correlations between the material on the needle surface and the needle concentrations for As and Br, but not between the soil and the needle concentrations. Bromine values are much higher at the polluted and at the maritime site than at the unpolluted sites.
Show more [+] Less [-]Variations in sulphur and nitrogen foliar concentration of deciduous and conifers vegetation in Slovakia
1997
Mankovska, B. (Forest Research Inst., Zvolen (Slovak Republic).)
Ion leaching before and after clear-cutting in a Norway spruce stand: effects of long-term application of ammonium nitrate and superphosphate
1997
Berden, M. (Swedish Univ. of Agricultural Sciences, Uppsala (Sweden). Dept. of Soil Sciences) | Nilsson, S.I. | Nyman, P.
