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A novel water quality model: from legislation to application
1993
Clark, K.J. | Mollowney, B.M. | Harbott, B. (WRc plc., Marlow, Bucks (United Kingdom))
Agricultural sources and sinks of carbon
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.
Показать больше [+] Меньше [-]Aquaculture in warm brewery effluents: a way to upgrade the used waters, the waste-heat and by-products [fish culture, in Belgium with African catfish and European eel]
1993
Vriens, L. | Muylder, E. de (Seghers Engineering, Willebroek (Belgium)) | Eyben, D.
The influence of agriculture on water quality
1993
Andreoli, C.V. (Universidad Federal do Parana, Curitiba (Brazil). Dept. de Suelos)
Pollution of groundwater resources in rural areas and its impact on agriculture and health: Huaura case study, Peru
1993
Ventura Napa, M. (Ministerio de Agricultura, Lima (Peru))
The use of bioindicators to determine water quality
1993
Guerrero Padilla, A.M. (Universidad Nacional de Trujillo (Peru))
Water quality data programmes for developing land use and resource policies: Latin America
1993
Ongley, E.D. (Canada Center for Inland Waters, Burlington, Ontario (Canada))
Water quality assessment to determine the nature and extent of water pollution by agriculture and related activities
1993
Rickert, D. (U.S. Geological Service, Reston, VA (USA))
Improving nitrogen management in irrigated, intensely cultivated areas: the approach in France
1993
Ignazi, J.C. (Comite d'Orientation pour la Reduction de la Pollution par les Nitrates, Paris (France))
Results of the questionnaire filled out by participating countries from Latin America and the Caribbean
1993
Chanduvi, F. | Prieto-Celi, M.
