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Sedimentological characteristics and mineralization of sediment in the run-of-the river reservoir Djerdap 1 [Yugoslavia]
1998
Perisic, M. | Markovic, I. | Janezic, V. (Geoinstitut, Beograd (Yugoslavia))
In previous works numerous specific changes of water composition in the Danube backwater effects Iron Gate 1 reservoir (Yugoslavia), have been initiated. By studies of conditions of generation and composition of sediments, the models denying importance of assumption on sedimentological features of deposited materials foreseen by the project, have been established, as it was confirmed with more details by newer investigations. The new data on the character of sediments coincide in all elements with changes of water composition, which was formerly presented, thus the knowledges of these phenomena being in that way more important. The data on composition of the deposited material, the macro and micro-composition are of great importance to perceive the influence of new sediments to the quality of surface and groundwater, especially of the sources for water supply, then in a long term for the sudden high risk processes corresponding to a chemical time bomb. Data have confirmed validity of the model of intensified deposition of allochthonous material with plankton and influence of this phenomenon to the processes trough the downstream section.
Mostrar más [+] Menos [-]Mineralization exchange of the Danube water [Serbia, Yugoslavia]
1997
Savic, R. | Belic, S. (Poljoprivredni fakultet, Novi Sad (Yugoslavia). Institut za uredjenje voda)
Nowadays, different profile of experts are present opinion that surface water quality are exchanged. Type and degree of mineralization content exchange are shown by argumentation. The work have carried out taking into consideration suitability of Danube water for irrigation. The results of chemical investigation from three sample locations (Bezdan, Novi Sad and Banatska Palanka), Serbia (Yugoslavia) during the period 1981-1995, were analyzed. The main statistical parameters and tests of homogeneity are used during the work. Results have pointed put more or less concentration decreasing of analyzed parameters. From statistical point of view, exchange of electrical conductivity and potassium are prominent on all three localities.
Mostrar más [+] Menos [-]Adsorption and degradation of the herbicide nicosulfuron in a stagnic Luvisol and Vermic Umbrisol cultivated under conventional or conservation agriculture
2021
Cueff, Sixtine | Alletto, Lionel | Dumeny, Valerie | Benoit, Pierre | Pot, Valerie | AGroécologie, Innovations, teRritoires (AGIR) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Ecole d'Ingénieurs de Purpan (INP - PURPAN) ; Institut National Polytechnique (Toulouse) (Toulouse INP) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Ecologie fonctionnelle et écotoxicologie des agroécosystèmes (ECOSYS) ; AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Agence de l'Eau Adour-Garonne | Occitanie Region (BAG'AGES project) | Occitanie Region (BAG'AGES CISOL project)
International audience | The main goals of conservation agriculture are to enhance soil fertility and reduce soil degradation, especially through erosion. However, conservation agriculture practices can increase the risk of contamination by pesticides, mainly through vertical transfer via water flow. Better understanding of their sorption and degradation processes is thus needed in conservation agriculture as they control the amount of pesticide available for vertical transfer. The purpose of our study was to investigate the sorption and degradation processes of nicosulfuron in soil profiles (up to 90 cm deep) of a Vermic Umbrisol and a Stagnic Luvisol managed either in conventional or in conservation agriculture. Two laboratory sorption and incubation experiments were performed. Low sorption was observed regardless of the soil type, agricultural management or depth, with a maximum value of 1.3 +/- 2.0 L kg(-1). By the end of the experiment (91 days), nicosulfuron mineralisation in the Vermic Umbrisol was similar for the two types of agricultural management and rather depended on soil depth (29.0 +/- 2.3% in the 0-60-cm layers against 7.5 +/- 1.4% in the 60-90 cm). In the Stagnic Luvisol, nicosulfuron mineralisation reached similar value in every layer of the conservation agriculture plot (26.5% +/- 0.7%). On the conventional tillage plot, mineralisation decreased in the deepest layer (25-60 cm) reaching only 18.4 +/- 6.9% of the applied nicosulfuron. Regardless of the soil type or agricultural management, non-extractable residue formation was identified as the main dissipation process of nicosulfuron (45.1 +/- 8.5% and 50.2 +/- 7.0% under conventional and conservation agriculture respectively after 91 days). In our study, nicosulfuron behaved similarly in the Vermic Umbrisol regardless of the agricultural management, whereas the risk of transfer to groundwater seemed lower in the Stagnic Luvisol under conservation agriculture.
Mostrar más [+] Menos [-]Modelling the effects of nitrogen addition on soil nitrogen status and nitrogen uptake in a Norway spruce stand in Denmark
1998
Beier, C. | Eckersten, H. (RISO National Laboratory, P.O. Box 49, DK-4000 Roskilde (Denmark))
Decomposer communities in contaminated soil: is altered community regulation a proper tool in ecological risk assessment of toxicants?
1997
Salminen, J.E. | Sulkava, P.O. (University of Jyvaskyla, Department of Biological and Environmental Science, P.O. Box 35, FIN-40351 Jyvaskyla (Finland))
Influence of set-aside on the nitrate content of soil profiles
1998
Clotuche, P. | Godden, B. | Bol, V. van | Peeters, A. | Penninckx, M. (Universite Catholique de Louvain, Laboratoire d'Ecologie des Prairies, Place Croix du Sud, 1348 Louvain-la-Neuve (Belgium))
Nitrogen mineralisation in deciduous forest soils in south Sweden in gradients of soil acidity and deposition
1998
Falkengren-Grerup, U. | Brunet, J. | Diekmann, M. (Department of Plant Ecology, Ecology Building, Lund University, S-223 62 Lund (Sweden))
The influence of drought and natural rewetting on nitrogen dynamics in a coniferous ecosystem in Ireland
1998
Dise, N.B. | Matzner, E. | Forsius, M. (Department of Earth Sciences, The Open University, Milton Keynes, MK76AA (United Kingdom))
Nitrate in nature: product of soil cover
1998
Bielek, P. (Soil Fertility Research Institute, Gagarinova 10, 827 13 Bratislava (Czech Republic))
Factors influencing NO3 concentrations in rain, stream water, ground water and podzol profiles of eight small catchments in the European Arctic
1998
Kashulina, G. | Reimann, C. | Finne, T.E. | Caritat, P. de | Niskavaara, H. (INEP, Kola Science Centre, Fersman st., 14, Apatity, 184200 (Russian Federation))