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Résultats 151-160 de 198
[Studies on the virus contamination in young forest plantations and regional research stands in North Rhine-Westphalia]
1987
Niehaus, F. (Bonn Univ. (Germany, F.R.). Inst. fuer Pflanzenkrankheiten)
[The application of mycorrhiza fungi for counteracting forest damages]
1987
Fabig, W. (Fraunhofer-Institut fuer Umweltchemie Oekotoxikologie, Schmallenberg (Germany, F.R.))
Natural gas applications for air pollution control
1987
Hay, Nelson E.
Pollution control instrumentation for oil and effluents
1987
Parker, H. D. | Pitt, G. D.
[The role of the State Institute for Protection against Air Pollution of North Rhine-Westphalia in the clarification of the causes of new types of forest dieback]
1987
Stratmann, H. (Landesanstalt fuer Immissionsschutz des Landes Nordrhein-Westfalen, Essen (Germany, F.R.))
[On the effects of ozone on the formation of nitrate in needles and leaves of Picea abies (L.) Karst., Fagus sylvatica (L.) and Quercus robur (L.)]
1987
Krause, G.H.M. (Landesanstalt fuer Immissionsschutz des Landes NordrheinWestfalen (LIS), Essen (Germany, F.R.))
[Studies on the mycological aspects of forest damages with special regard to the mycorrhizae]
1987
Lelley, J. (Versuchsanstalt fuer Pilzanbau, Krefeld (Germany, F.R.)) | Schmitz, D. | Rieth, C. | Willenborg, A.
[Studies on the natural regeneration of European beech in North Rhine-Westphalia]
1987
Roehrig, E. (Goettingen Univ. (Germany, F.R.). Inst. fuer Waldbau)
[Determination of cytokinin in needles of Norway spruce (Picea abies)]
1987
Hahn, H. (Bonn Univ. (Germany, F.R.). Botanisches Inst.) | Schwartzenberg, K. von
[Studies on the development of beech forest ecosystems damaged by air pollution in North Rhine-Westphalia]
1987
Huettermann, A. (Goettingen Univ. (Germany, F.R.). Forstbotanisches Inst.) | Merg, G. | Feig, R. | Fritz, E. | Godbold, D.
