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1991

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Resultados 191-200 de 222

Soil ciliates as indicators of fundamental changes in forest ecosystems

1991

Lehle, E. (Ulm Univ. (Germany). Abt. Oekologie und Morphologie der Tiere) | Funke, W.

acid soils indicator animals picea abies fauna del suelo pluie acide sol acide (430-13) alemania/ aplicacion de abonos germany/ fertilizer application sueddeutschland mikrofauna laborkulturen ...
ZB MED Nutrition. Environment. Agriculture - Germany
Immission measurements at Schoellkopf near Freudenstadt

1991

Baumbach, G. (Stuttgart Univ. (Germany). Inst. fuer Verfahrenstechnik und Dampfkesselwesen. Abt. Reinhaltung der Luft) | Baumann, K.

sulphur dioxide measurement picea abies charge polluante fichte nitrogen dioxide monatsmittelwerte waldbestaende schwarzwald zweigeinschlusskammer-methode dioxido de azufre o3 eintrag bestimmung ...
ZB MED Nutrition. Environment. Agriculture - Germany
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.

seasonal development facteur du milieu picea abies factores ambientales carbohydrates fructose 161.32 baden-wuerttemberg/ hojas untersuchungszeitraum mai 89-okt.90 baden-wuerttemberg/ leaves umgebungsluft freilandkontrollen ...
ZB MED Nutrition. Environment. Agriculture - Germany
L' evaluation de la pollution atmospherique transfrontiere a longue distance.

1991

incentivos pollution control lutte antipollution air pollution environmental policies arbre forestier pollution atmospherique politica ambiental control de la contaminacion politique de l' environnement cout arboles forestales ...
Wolters Kluwer - United States of America
L' etat de la pollution atmospherique transfrontiere: mise a jour 1989.

1991

pollution control pollution du sol environmental impact national expenditure heavy metals lutte antipollution impact sur l' environnement pollution atmospherique control de la contaminacion cout metal lourd polucion del suelo ...
Wolters Kluwer - United States of America
Water Pollution Prevention and Control Act of 1991

1991

pollution water united states law and legislation
National Agricultural Library - United States of America
Silvicultural practices

1991

Lord, Roger G. | Dreesen, Alan D.

forest management water pollution forest soils pollution silviculture forest management silvicultural practices forests and forestry ...
National Agricultural Library - United States of America
Field crop production as a source of groundwater pollution

1991

Weaver, Robert D.

pennsylvania crop production agricultural pollution groundwater water resources water management plant cultural practices environmental aspects corn ...
National Agricultural Library - United States of America
Management of nutrition in forests under stress

1991

Zöttl, H. W. | Hüttl, R. F.

trees trees nutrition nutrition forest ecology forest soils effect of stress on effect of pollution on ...
National Agricultural Library - United States of America
Water quality characterization of Hizawa River [Japan]

1991

Kohno, Y. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Harada, T. | Muramatsu, K. | Higuchi, S. | Kondoh, K. | Kuwabara, H.

ions watershed management water pollution sulphuric acid mine spoil rivers ...
The Agriculture, Forestry and Fisheries Research Information Technology Center - Japan