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Soil ciliates as indicators of fundamental changes in forest ecosystems
1991
Lehle, E. (Ulm Univ. (Germany). Abt. Oekologie und Morphologie der Tiere) | Funke, W.
L' etat de la pollution atmospherique transfrontiere: mise a jour 1989.
1991
L' evaluation de la pollution atmospherique transfrontiere a longue distance.
1991
Intermediates of carbohydrate and energy metabolism in Norway spruce needels in relation to season and decline symptoms
1991
Einig, W. (Tuebingen Univ. (Germany). Physiologische Oekologie der Pflanzen) | Egger, B. | Hampp, R.
CO2-gas-exchange and transpiration of open-grown Norway spruce during the year in higher elevation of the Southern Black Forest under local air conditions with and without O3, respectively
1991
Abetz, P. (Freiburg Univ. (Germany). Inst. fuer Waldwachstum) | Kuenstle, E. | Wolfart, A.
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.
Silvicultural practices
1991
Lord, Roger G. | Dreesen, Alan D.
Water Pollution Prevention and Control Act of 1991
1991
Future research directions and data requirements for developing ambient ozone guidelines or standards for agroecosystems Texte intégral
1991
Jäger, Hans-Jürgen | Grünhage, Ludger | Dämmgen, Ulrich | Richter, Otto | Krupa, Sagar V.
Single and interactive effects of low levels of O3, SO2 and NO2 on the growth and yield of spring rape Texte intégral
1991
Adaros Vásquez, Gastón | Weigel, Hans-Joachim | Jäger, Hans-Jürgen
