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Resultados 151-160 de 282
Evaluation of the sulphur budget of forest ecosystems (Black Forest) by means of stable sulphur isotope analysis. 2: Spatial variability of S-isotope composition in soil and needle samples
1993
Giesemann, A. (Giessen Univ. (Germany). Inst. fuer Pflanzenoekologie) | Jaeger, H.J.
The effects of different fertilizers on the ciliate communities of forests
1993
Lehle, E. (Ulm Univ. (Germany). Abt. Oekologie und Morphologie der Tiere) | Funke, W.
Composting and reed beds for aerobic treatment of livestock wastes
1993
Biddlestone, A.J. | Gray, K.R. | Thayanithy, K. (School of Chemical Engineering, University of Birmingham, PO Box 363, Edgbaston, Birmingham, B15 2 TT (United Kingdom))
Ecology and pollution of Ganga River
1993
Khanna, Dev Raj
[Agricultural use of wastewaters from the agroindustrial sector]
1993
Xanthoulis, D. (Faculte des Sciences Agronomiques de Gembloux (Belgium). Unite d'Hydraulique Agricole)
Direct and Indirect effects and the Long-term Risks of Air Pollution on Forest Ecosystems:
1993
Skelly, J.M. (Pennsylvania State University, University Park (USA))
Tropospheric ozone is the most important single air pollutant of importance to forests in eastern United States. Both broadleaf and needled trees may suffer premature foliar senescence following even low ozone exposure years. Genetic sensitivity within species is likewise prevalent.
Mostrar más [+] Menos [-]Indirect effects and the Long-term Risks of Air Pollution on Eastern North American Temperate Forest Ecosystems: Insect Outbreaks
1993
Chappelka, A.H. (Auburn University, Alabama (USA). School of Forestry)
Air pollutants cause subtle changes in natural resistance that can prediscope plants to insect attack. The majority of reports in the area of plant-pollutant-insect interactions have been correlative in nature. In the last ten years, there has emerged a growing body of literature, the vast majority with herbaceous crops, reporting on cause-effect relationships among insects and their hosts.
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