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结果 171-180 的 229
Physiological and cytomorphological investigations of undamaged and damaged Norway spruce in the Northern Black Forest
1991
Wild, A. (Mainz Univ. (Germany). Inst. fuer Allgemeine Botanik) | Tietz, S.
Changes in photosynthetic activity, chlorophyll-fluorescence parameters and pigment content of differently damaged Norway spruces during the vegetation period
1991
Rinderle, U. (Karlsruhe Univ. (Germany). Botanisches Inst.) | Lichtenthaler, H.K.
Uptake and localization of nutritive and potentially toxic minerals in ectomycorrhizae of forest trees
1991
Kottke, I. (Tuebingen Univ. (Germany). Inst. fuer Botanik) | Oberwinkler, F.
Investigations on fine roots and mycorrhizae on the ARINUS-plots
1991
Haug, I. (Tuebingen Univ. (Germany). Spezielle Botanik) | Pritsch, K. | Oberwinkler, F.
Immission measurements at Schoellkopf near Freudenstadt
1991
Baumbach, G. (Stuttgart Univ. (Germany). Inst. fuer Verfahrenstechnik und Dampfkesselwesen. Abt. Reinhaltung der Luft) | Baumann, K.
Open-top chamber experiment "Edelmannshof": Determination of biochemical parameters in needles of Norway spruce fumigated with unfiltered or charcoalfiltered air in comparison to untreated trees
1991
Egger, B. (Tuebingen Univ. (Germany). Physiologische Oekologie der Pflanzen) | Braun, C. | Einig, W. | Hampp, R.
Project ARINUS: 5. Element cycling in the control watersheds and fertilizer leading
1991
Brahmer, G. (Freiburg Univ. (Germany). Inst. fuer Bodenkunde und Waldernaehrungslehre) | Feger, K.H. | Zoettl, H.W.
Biochemical and metabolic physiological investigations to detect effects of air pollutants on Norway spruce in open-top-chambers
1991
Manderscheid, R. (Giessen Univ. (Germany). Inst. fuer Pflanzenoekologie) | Schenk, U. | Jaeger, H.J.
Tillage and cropping systems
1991
Harris, B. L. | Hons, F. M. | Toombs, M. M.
Reauthorization of the Federal Water Pollution Control Act
1991