Sökning: "skogsbruk och fiske Jordbruksvetenskap"
Visar resultat 16 - 20 av 208 avhandlingar innehållade orden skogsbruk och fiske Jordbruksvetenskap.
16. 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
17. Phosphorus leaching from Swedish arable organic soils : quantification and mitigation using biochar
Sammanfattning : Organic soils account for 9% or ~225,000 ha of Sweden’s 2.5 million ha of agricultural land, with around half being intensively cultivated. LÄS MER
18. 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
19. Electric autonomous tractors in Swedish agriculture : A systems analysis of economic, environmental and performance effects
Sammanfattning : Use of battery-electric vehicles has become common in different sectors, as a measure to reduce greenhouse gas emissions. Driveline electrification in agricultural machinery could reduce emissions and increase driveline efficiency, but implementation has been hindered by the low energy-carrying capacity of batteries compared with conventional fuels. LÄS MER
20. Nitrous oxide and methane emissions from storage and land application of organic fertilisers : with the focus on sewage sludge
Sammanfattning : Organic fertiliser handling contributes to greenhouse gas emissions. Through storage and field experiments, this thesis examined strategies to reduce emissions of nitrous oxide (N2O) and methane (CH4) from storage and after land application of cattle slurry (CS) and sewage sludge (SS). LÄS MER