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peer reviewed | Foliar analysis was undertaken in two plots of Picea abies (L.) Karst., located in a watershed of Haute Ardenne, Belgium, in order to estimate the decline of the trees. Apart from a general Mg deficiency, the concentrations of the needles were in the same range as those determined in other European stands. Comparisons between healthy and declining trees within each plot revealed a general pattern of decline similar to that observed elsewhere in Western Europe. This was shown as lower Ca, Mg, Zn concentrations and water content and higher N and P concentrations of the needles collected from declining trees. It is concluded that this decline could be due to N over fertilization by the atmospheric deposition. The difference of decline between the two plots was attributed to the turnover rate of the soil organic layer which was less intensive in the most damaged plot.

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life sciences sciences de l’environnement & écologie environmental sciences & ecology sciences du vivant

University of Liège - Belgium

In situ treatment of hazardous waste-contaminated soils

1991

Chambers, Catherine D.

hazardous wastes in situ remediation environmental aspects soil remediation

National Agricultural Library - United States of America

Dying forest and air pollution: what we have learnt (DEFORPA program 1984-1991)

1991

Landmann, G. (Ministere de l'Agriculture, Paris (France). Departement de la Sante des Foret)

acid rain air pollution clima pluie acide forests contaminantes diagnostico acidificacion pollution atmospherique france/ damage lluvia acida foret ...

Institut national de la recherche agronomique - France

Chemical reactions of metals with humic material

1991

Livens, F.R. (Institute of Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria LA11 6JU (UK))

metallic elements humus complejos organominerales organomineral complexes complexe organomineral element metallique elementos metalicos

Department for Environment, Food and Rural Affairs - United Kingdom

[Forest decline and air pollution. Results of five years of research (1985-1990) in the framework of the French program DEFORPA [forest decline attributed to air pollution]]

1991

Landmann, G. (Institut National de la Recherche Agronomique, Seichamps (France). Centre de Nancy, Station de Recherches Sol Microbiologie et Nutrition des Arbres Forestiers, Programme DEFORPA)