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[Measurement and experiment station in the forest (MEXFO) -First results of the analyses of precipitation and soil water samples]
1987
Thiele, V. | Specovius, J. | Metzger, F. | Prinz, B.
[The research topic of North Rhine-Westphalia on "air pollution and forest damage". - Research plan for the research programme]
1987
Koeth, I. | Prinz, B.
Controlling and reducing pollution from plastic waste
1987
Reversibility of acidification
1987
Barth, H.
An open-top chamber study with filtered and non-filtered air to evaluate the effects of air pollutants on crops
1987
Weigel, Hans-Joachim | Adaros Vásquez, Gastón | Jäger, Hans-Jürgen
[Morphological and physiological damage of soil deterioration to the mycorrhiza-root-system of European beech and possibilities of regeneration of mycorrhiza]
1987
Hofmann, H.-P. (Karlsruhe (Germany, F.R.). Botanisches Inst.)
Transition of water pollution load in Lake Suwa [Japan]
1987
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Kawamura, M. | Higuchi, S. | Nakazawa, Y.
Investigation on release of nitrogen and phosphorus from the sediments of different depth in Lake Suwa [Japan]
1987
Kono, Y. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Terasawa, J. | Harada, T. | Nasu, Y. | Kugimoto, M.
For the purpose of determining the effect of dredging on nutrients releasing from the sediment at the bottom of Lake Suwa after some of its sediment has been dredged, an experiment was performed to find out how much ammonium and phosphate would release from different depths of the sediment. Lake Suwa's sediment contains a lot of nitrogen and phoshorus down to its lower layers. The results of the experiment were as follows: The speed at which ammonium released from was faster as the depth of sediment increased. The speed at which ammonium was generated in the sediment showed the highest of 2.58N micro g/g dry sediment d in a 0-10cm layer. However, ammonium showed a generation speed of 1.3-1.4N micro g/g dry sediment-d at the depth of 10cm and more, indicating that ammonium easy to release from is generated even in lower layers. The speed at which phosphorus released from was 1.3-1.7Pmg/square m d in a 0-20cm deep layer, and 0.14-0.31Pmg/square m d at the depth of 20cm and more. The speed of Phosphorus releasing from lower layers of the sediment decreased to 1/4-1/10 of that in upper layers, and it was indicated that very little phosphorus flows out of the sediment at the depth of 20cm and more.
显示更多 [+] 显示较少 [-]Survey of tsutsugamushi disease in Nagano prefecture during the period of 1981-1986
1987
Miyasaka, T. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Muramatsu, K. | Wada, M. | Sasai, S. | Kobayashi, M.
The Use of macrophytes in water pollution control
1987
Athié, Diva | Cerri, Carlos Clemente
