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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.
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.
The state of transboundary air pollution: 1992 update. Report prepared within the framework of the Convention on Long-Range Transboundary Air Pollution
1993
Water supply and pollution control
1993
Viessman, Warren | Hammer, Mark J.
Diurnal and seasonal carbon dioxide exchange and its components in temperate grasslands in the Netherlands - an outline of the methodology.
1993
Dirks, B.O.M.
Factors influencing the uptake of PCBs and DDTs in red mullet (Mullus barbatus) from Pagassitikos Gulf, Central Greece
1993
Vassilopoulou, V. | Georgakopoulos-Gregoriades, E. (National Centre for Marine Research, Hellenikon 166 04 (Greece))
Marine pollution and international law
1993
Brubaker, Douglas
Adrenocortical hyperplasia, disease and chlorinated hydrocarbons in the harbour porpoise (Phocoena phocoena)
1993
Kuiken, T. | Hofle, U. | Bennett, P.M. | Allchin, C.R. | Kirkwood, J.K. | Baker, J.R. | Appleby, E.C. | Lockyer, C.H. | Walton, M.J. | Sheldrick, M.C. (Veterinary Science Group, Institute of Zoology, Zoological Society of London, Regent's Park, London NW1 4RY (United Kingdom))
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 [-]Measuring pollution prevention progress proceedings
1993
