خيارات البحث
النتائج 1 - 7 من 7
Silver fir decline in the Vosges mountains (France): role of climate and silviculture.
1989
Becker M. | Landmann G. | Levy G.
Degradation of pesticides in the unsaturated zone of soil
1995
Anderson, J.P.E.
Air pollution and forests - an overview
1993
Innes, J.L. (Swiss Federal Institute for Forest Snow and Landscape Research, Birmensdorf (Switzerland))
Considerable uncertainty has surrounded the relationship between forest growth and forest declines in Europe. Although growth decreases have been recorded in several years, by the end of the 1980s, increment at many sites had reached a level higher than any previously recorded. Fertilization by carbon dioxide, favourable climatic conditions and better stand management may all have contributed.
اظهر المزيد [+] اقل [-]Pedologic and nutritional aspects of enhanced carbon-dioxide storage in forest ecosystems
1993
Huettl, R.F. (Forestry Dept. Kali and Salz AG, Kassel (Germany))
Enhanced forest growth in combination with relatively high Nitrogen deposition may result in further pedologic and nutritional changes and an even greater destabilisation of forest ecosystems.
اظهر المزيد [+] اقل [-]Reducing salinization of soil and water by improving irrigation and drainage management
1993
Rhoades, J.D. (United States Dept. of Agriculture, Riverside, CA (USA). Salinity Lab.)
[Reducing salinization of soil and water by improving irrigation and drainage management]
1993
Rhoades, J.D. (United States Dept. of Agriculture, Riverside, CA (USA). Salinity Lab.)
[Morphological and physiological damage of soil deterioration to the mycorrhiza-root-system of European beech and possibilities of regeneration of mycorrhiza]
1987
Hofmann, H.-P. (Karlsruhe (Germany, F.R.). Botanisches Inst.)
