Blar i Doctoral theses (IMV) på tittel
Viser treff 12-24 av 24
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Learning from the past : using lake sediments as chemical and biological archives
(PhD Thesis;2015:27, Doctoral thesis, 2017-07-12)This thesis advances the analysis of the organic fraction of sediment to reconstruct lake history using DNA fragments and algal pigments in combination with available monitoring data. These methods were tested in southern ... -
Modeling organic matter decomposition and nitrogen dynamics in agricultural soils : Environmental impacts of plant production systems
(PhD Thesis;2011:69, Doctoral thesis, 2011)Agricultural plant production has negative environmental impacts such as nitrate leaching and emissions of greenhouse gasses (N2O and CO2). Both phenomena are affected by the decomposition of soil organic matter and plant ... -
Nitrogen dynamics in an organic green manure - cereal rotation and mineralization of clover leaves at low temperature
(PhD Thesis;2016:25, Doctoral thesis, 2017-07-12)In northern temperate regions, grass-clover green manure leys are commonly used as a break crop in stockless organic cereal rotations in order to provide soil fertility and reduce the pressure of weeds, pests and diseases, ... -
Nitrogen turnover and N2O emissions as a function of edaphic and hydrological conditions in subtropical forests of South China
(PhD Thesis;2016:81, Doctoral thesis, 2017-07-12)Forests in the Chinese subtropics receive large amounts of nitrogen (N) from the atmosphere, both as ammonium (NH4 +) and nitrate (NO3 -). Many of these forests are considered to be “N-saturated”, i.e. are not able to ... -
Road deicing salt and copper : transfer and effects on fertilization and early life history stages of Atlantic salmon (Salmo salar)
(PhD Thesis;2015:66, Doctoral thesis, 2017-07-12)Application of road deicing salt in the Nordic countries have increased considerably over the years, in order to enhance good friction and thereby increasing the traffic safety on icy roads during the winter period. The ... -
Sheep grazing effects on soil carbon and nitrogen and implications for runoff water quality at a low alpine site in southern Norway
(2011;2011:10, Doctoral thesis, 2011)Grazing in outlying fields has a long history and is important in local communities worldwide. Alpine ecosystems, representing a large proportion of the land area in Europe, are under pressure from changes in climate and ... -
Soil quality and carbon footprint of different land uses by smallholder farmers in Ethiopia
(PhD Thesis;2014:70, Doctoral thesis, 2014)In Ethiopia, deforestation of natural forests and extensive use of agricultural lands have resulted in soil degradation. Despite recent massive restoration measures implemented on degraded landscapes, nowhere in the country ... -
Source identification of Pu and 236U deposited on Norwegian territories
(PhD Thesis;2013:56, Doctoral thesis, 2013)Plutonium (Pu) is a predominately anthropogenic element produced during neutron irradiation of U in reactors and nuclear weapon detonations. Pu has been released to the environment during nuclear weapon detonations, nuclear ... -
Source separating sanitary systems : energy efficient treatment of blackwater and minimizing greenhouse gas emissions
(PhD Thesis;2015:31, Doctoral thesis, 2017-07-12) -
The recycling potential of phosphorus in secondary resources
(PhD Thesis;2016:35, Doctoral thesis, 2017-07-12)Mineable rock phosphate is a limited resource. Replacing mineral phosphorus (P) fertilizer with P-rich secondary resources is one way to manage P more efficiently. The Norwegian potential to replace mineral P fertiliser ... -
Toxicity of single biocides and their mixtures in the algae Chlamydomonas reinhardtii
(PhD Thesis;2015:69, Doctoral thesis, 2017-07-12)Aquatic organisms are exposed to several organic compounds including biocides. These compounds are widely used, for instance as disinfectants, in antifouling paints, or as material preservatives. Biocides can originate ... -
Trace metal availability in soils under different land uses of the Danube basin in Croatia
(PhD Thesis;2011:65, Doctoral thesis, 2011)Soils are non-renewable resource of biological, chemical and physical properties. One of the ecological functions of the soil is its capacity to filter and buffer trace metals. Trace metals can pose a threat on the one ... -
Variability and uncertainty in soil physical properties : effects of data source on functional criteria
(PhD Thesis;2011:40, Doctoral thesis, 2011)Modeller har blitt uunngåelige verktøy for en lang rekke problemstillinger knyttet til landbruk og miljø. Samtidig er modellering forbundet med usikkerhet, noe som kan ha konsekvenser når beslutninger skal fattes. En av ...