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Visar resultat 1 - 5 av 329 avhandlingar som matchar ovanstående sökkriterier.
1. Recycling Filter Substrates used for Phosphorus Removal from Wastewater as Soil Amendments
Sammanfattning : This thesis studied the viability of recycling filter substrates as soil amendments after being used in on-site systems for phosphorus (P) removal from wastewater. Focus was put on the materials Filtra P and Polonite, which are commercial products used in compact filters in Sweden. LÄS MER
2. Mitigation of phosphorus leaching from agricultural soils : improved fertilization and soil structure
Sammanfattning : Phosphorus (P) is an essential element in crop production, but P losses from agricultural soils are a major contributor to surface water eutrophication. This thesis examined the effects of chemical soil properties and soil structure, as governed by agricultural management practices, on P leaching from agricultural soils and how this leaching can be reduced. LÄS MER
3. Nitrogen Losses from a Clay-rich Soil used for Cereal Production in south-western Sweden
Sammanfattning : 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. LÄS MER
4. The role of subsoil properties for phosphorus leaching in agricultural soils
Sammanfattning : Phosphorus (P) leaching from agricultural land is a large contributor to eutrophication of many surface waters and the Baltic Sea. Better knowledge of P sorption and release in the subsoil could enable the development of effective mitigation strategies for P leaching. LÄS MER
5. Impact of horse-keeping on phosphorus (P) concentrations in soil and water
Sammanfattning : Agricultural sources contribute significantly to the high phosphorus (P) loads in water, causing eutrophication in many of Europe’s water bodies. Consequently, priority has been given to reducing P leakage from sources, including soils used for animal farming. LÄS MER