| Titre : | Hydrobiologia 384 - 1998 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
M. G. Kelly, Auteur ;
B. A. Whitton, Auteur
There is an increasing awareness of the need to assess the impact of nutrient enrichment on river ecosystems separately from the impacts of organic effluents. A range of methods have been proposed and some have moved from the development stage t[...]
Article
H. L. Golterman, Auteur ;
P. Bruijn, Auteur ;
J. G. M. Schouffoer, Auteur ;
E. Dumoulin, Auteur
The use of urea as N-fertilizer for rice production has been studied for European conditions. In field and pot experiments, urea appeared to be more efficient than ammonia or nitrate. The rice yield could be maintained at maximal local productio[...]
Article
H. Loffler, Auteur ;
E. Schiller, Auteur ;
E. Kusel, Auteur ;
H. Kraill, Auteur
The most interesting (Hutchinson, 1957), and at the same time oldest graben lakes of Europe, are Lakes Ohrid and Prespa. According to geologists and geographers, both originated during the Pliocene. They show karstic features and differ by volum[...]
