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Model studies on heterogeneous reactions of organic components within aerosols and their influence on the condensation of water: Surface-analytical investigations on the water up-take of fly-ashes before and after exposition to fluoranthene and toluene
1993
Faude, F. (Kernforschungszentrum Karlsruhe (Germany). Inst. fuer Radiochemie) | Goschnick, J.
Climatic variation and growth of Norway spruce (Picea abies (L.) Karst.), silver fir (Abies alba Mill.) and beech (Fagus silvatica L.) in southwestern Germany
1993
Kahle, H.P. (Freiburg Univ. (Germany). Inst. fuer Waldwachstum) | Hahn, D. | Spiecker, H.
Water supply and pollution control
1993
Viessman, Warren | Hammer, Mark J.
Agricultural sources and sinks of carbon Full text
1993
Cole, C Vernon | Flach, Klaus | Lee, Jeffrey | Sauerbeck, Dieter | Stewart, Bobby
Most existing agricultural lands have been in production for sufficiently long periods that C inputs and outputs are nearly balanced and they are neither a major source nor sink of atmospheric C. As population increases, food requirements and the need for more crop land increase accordingly. An annual conversion of previously uncultivated lands up to 1.5 x 10⁷ hectares may be expected. It is this new agricultural land which suffers the greatest losses of C during and subsequent to its conversion. The primary focus for analysis of future C fluxes in agroecosystems needs to be on current changes in land use and management as well as on direct effects of CO2 and climate change. A valid assessment of C pools and fluxes in agroecosystems requires a global soils data base and comprehensive information on land use and management practices. A comprehensive effort to assemble and analyze this information is urgently needed.
Show more [+] Less [-]Marine pollution and international law
1993
Brubaker, Douglas
Pollutant exclusion experiments on spruce at the Edelmannshof site. Results of physiological and biochemical investigations
1993
Arndt (Hohenheim Univ. (Germany). Inst. fuer Landschafts-und Pflanzenoekologie) | Bauer | Bourgois | Christmann | Dizengremel | Egger | Einig | Fink | Flammersfeld | Frenzel | Granier | Guelpen | Hampp | Jaeger | Lu | Manderscheid | Meier | Petrini | Schmidt | Schneckenburger | Schweizer | Strobel | Urfer | Wild
Project ARINUS: 7th state of the art and perspectives
1993
Feger, K.H. (Freiburg Univ. (Germany). Inst. fuer Bodenkunde und Waldernaehrungslehre) | Brahmer, G. | Zoettl, H.W.
Soil chemical and -physical factors of mycorrhiza mycelium growth. 1: Investigation design and first results
1993
Hildebrand, E.E. (Forstliche Versuchs- und Forschungsanstalt Baden-Wuerttemberg, Freiburg (Germany). Abt. Bodenkunde und Waldernaehrung) | Wilpert, K. von | Schack-Kirchner, H.
Growth and activity of mycorrhizas in connection with nutrients, water and oxygen in soil. 1: Growth of plants and mycelia in the microcosms
1993
Kottke, J. (Tuebingen Univ. (Germany). Botanisches Inst. Spezielle Botanik und Mykologie) | Leontovykova, J.
Distributions of chemical reactive compounds: Effects of different emissions on the formation of ozone
1993
Vogel, H. (Karlsruhe Univ. (Germany). Inst. fuer Meteorologie und Klimaforschung) | Fiedler, F. | Vogel, B.