خيارات البحث
النتائج 121 - 130 من 267
The role of field experiments in the study of soil mediated effects of air pollution on forest trees
1989
Tamm, C.O. (Swedish University of Agricultural Sciences, Uppsala (Sweden). Dep. of Ecology and Environmental Research)
Bark beetles and air pollution [also incl. Ips typographus, Pityogenes chalcographus]
1989
Christiansen, E. (Norsk Institutt for Skogforskning, Aas (Norway). Inst. for Skogoekologi)
Microbial activity in forest soils in relation to acid/base and carbon/nitrogen status
1989
Persson, T. | Wiren, A. (Swedish University of Agricultural Scieces, Uppsala (Sweden). Dept. of Ecology and Environmental Research)
Monitoring of forest vitality in Norway
1989
Venn, K. | Holen, C.O. (Norsk Institutt for Skogforskning, Aas (Norway). Avd. for Skogoekologi) | Loevseth, T. (Norsk Inst. for Jord- og Skogkartlegging, Aas (Norway))
Ground water pollution potential of Lorain County, Ohio
1989
Barber, Douglas J.
Ground water pollution potential of Hamilton County, Ohio
1989
Ground water pollution potential of Mercer County, Ohio
1989
Sugar, David J.
Copper and zinc balance in soils, rice plants and aquatic systems in an area along the Fuchu precipice line, Tokyo, Japan
1989
Okazaki, M. (Tokyo Univ. of Agriculture and Technology, Tokyo (Japan). Faculty of Agriculture) | Saito, S.
Geochemical studies in a remote Scottish upland catchment, 2: Streamwater chemistry during snow-melt
1989
Abrahams, P.W. (East Anglia Univ., Norwich (UK). School of Environmental Sciences) | Tranter, M. | Davies, T.D. | Blackwood, I.L.
Effect of simulated acid rain on the yield of soybean
1989
Kohno, Y. (Central Research Inst. of Electric Power Industry, Abiko City, Chiba (Japan). Dept. of Biology) | Kobayashi, T.
