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Soil pollution
1991
Misra, S. G. | Mani, Dinesh
Nutritional status of declining spruce (Picea abies (L.) Karst.) - Effect of soil organic matter turnover rate
1991
Hambuckers, Alain | Remacle, Jean
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.
Показать больше [+] Меньше [-]In situ treatment of hazardous waste-contaminated soils
1991
Chambers, Catherine D.
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)
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))
[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)
Distribution of dissolved organic matter in the waters of the Saguenay river with respect to nominal molecular mass [gel filtration chromatography]
1991
Leclerc, A. (Universite du Quebec, Chicoutimi (Canada). Departement des Sciences Fondamentales) | Levert, L. | Wang, F.
[Damages of forests in Europe in 1989]
1991
Muehlemann, P.
Soil vapor extraction technology
1991
Pedersen, Tom A. | Curtis, James T.
