Advanced search
Showing result 1 - 5 of 1352 swedish dissertations matching the above criteria.
-
1. Marine nitrogen fixation : Cyanobacterial nitrogen fixation and the fate of new nitrogen in the Baltic Sea
Abstract : Biogeochemical processes in the marine biosphere are important in global element cycling and greatly influence the gas composition of the Earth’s atmosphere. The nitrogen cycle is a key component of marine biogeochemical cycles. READ MORE
-
2. Assessing reactive nitrogen flows in European agricultural systems
Abstract : In most ecosystems, nitrogen is a scarce and growth-limiting nutrient. Natural and anthropogenic processes convert unreactive atmospheric dinitrogen (N2) into reactive, bioavailable, nitrogen. READ MORE
-
3. Nitrogen Losses from a Clay-rich Soil used for Cereal Production in south-western Sweden
Abstract : Addition of fertiliser nitrogen (N) in crop production increases yields and protein contents, but all is not taken up by the crop. Instead, some of the N is lost to air and waters, contributing e.g. to climate change, stratospheric ozone depletion, eutrophication and acidification. READ MORE
-
4. Biological nitrogen fixation : the effect of irridiated nitrogen gas on nitrogen fixation by Azotobacter
Abstract : .... READ MORE
-
5. Riverine nitrogen : Analysis and modelling under Nordic conditions
Abstract : The Baltic Sea in northern Europe is a brackish water body where eutrophication is considered a serious problem, partly as a result of high nitrogen load from rivers. This thesis includes statistical analysis of nitrogen behaviour in 55 small catchments. The results were used for further development of a dynamic model (HBV-N). READ MORE