A5069557136- Soil Carbon and Nitrogen Dynamics
- Soil and Water Nutrient Dynamics
- Crop Yield and Soil Fertility
- Agriculture Sustainability and Environmental Impact
- Phosphorus and nutrient management
- Agronomic Practices and Intercropping Systems
- Peatlands and Wetlands Ecology
- Ruminant Nutrition and Digestive Physiology
- Plant nutrient uptake and metabolism
- Agricultural Economics and Policy
- Heavy metals in environment
- Groundwater and Isotope Geochemistry
- Clay minerals and soil interactions
- Geochemistry and Elemental Analysis
- Soil Geostatistics and Mapping
- Ammonia Synthesis and Nitrogen Reduction
- Agriculture, Plant Science, Crop Management
- Plant responses to elevated CO2
- Atmospheric chemistry and aerosols
- Sustainable Development and Environmental Policy
- Isotope Analysis in Ecology
- Organic Food and Agriculture
- Animal Behavior and Welfare Studies
- Greenhouse Technology and Climate Control
- Potato Plant Research
Norwegian University of Life Sciences
2012-2024
The Research Council of Norway
2001-2002
Crop residue incorporation is a common practice to increase or restore organic matter stocks in agricultural soils. However, this often increases emissions of the powerful greenhouse gas nitrous oxide (N2O). Previous meta-analyses have linked various biochemical properties crop residues N2O emissions, but relationships between these been overlooked, hampering our ability predict from specific residues. Here we combine comprehensive databases for and characteristics with random-meta-forest...
Crop residues are important inputs of carbon (C) and nitrogen (N) to soils thus directly indirectly affect nitrous oxide (N2 O) emissions. As the current inventory methodology considers N by crop as sole determining factor for N2 O emissions, it fails consider other underlying factors processes. There is compelling evidence that emissions vary greatly between with different biochemical physical characteristics, concentrations mineralizable decomposable C in residue biomass both enhancing...
Abstract Four‐species mixtures and pure stands of perennial ryegrass, tall fescue, white clover red were grown in three‐cut five‐cut systems at Ås, southern Norway, a low fertilization rate (100 kg N ha −1 year ). Over three‐year experiment, we found strong positive effects species diversity on annual dry‐matter yield stability under both cutting frequencies. The overyielding relative to was highest the system second year. Among possible pairwise interaction contributing effect, grass–grass...
Abstract Carbonatite originating from the Lillebukt Alkaline Complex at Stjernøy in Northern Norway possesses favorable lime and potassium (K) fertilizer characteristics. However, enrichments of barium (Ba) strontium (Sr) carbonatite may cause an undesired uptake by plants when applied to agroecosystems. A field survey was carried out compare concentrations Ba, Sr, macronutrients indigenous growing mineral soil developed on a bedrock apatite–biotite–carbonatite (high Ba Sr)...
Abstract. Legumes are an important source of nitrogen in stockless organic cereal production. However, substantial amounts N can be lost from legume-grass leys prior to or after incorporation as green manure (GM). Here we report N2O emissions a field experiment SE Norway exploring different management strategies: mulching versus removal grass-clover herbage during whole growing season and return biogas residue subsequent barley crop. Grass-clover ley had small but significantly higher...
Abstract Mixtures and pure stands of perennial ryegrass, tall fescue, white clover red were grown in a three‐cut five‐cut system southern Norway, at low fertilization rate (100 kg N ha −1 year ). The nutritional quality (annual weighted averages) the dried forage from two‐first harvesting years was analysed. There no significant effect species diversity on crude protein ( CP ) concentration. In system, we found leading to 10% higher concentrations acid detergent fibre ADF ), 20–22% lower...
Abstract Inclusion of legume species into grass leys reduces nitrogen (N) fertilizer need but increases the risk freeze-thaw induced N 2 O emissions. We investigated how liming and presence clover affect accumulation under snowpack its emission during cycles in autumn spring sub-boreal conditions. A field experiment was performed southern Norway limed control plots containing grasses only (fertilized with 270 kg ha −1 yr ), a grass-red mixture 140 ) unfertilized pure red clover. Soil air...
Abstract Uptake of barium (Ba) from soil by vascular plants varies among species. Despite the toxicity soluble Ba compounds to plants, research on mechanisms controlling uptake natural soils is scarce. This study investigated treatment effect lime (CaCO 3 ) added a sandy containing total 500 mg kg −1 and interspecies distribution in legumes other cultivated food feed plants. Nine species grasses, vegetables, herbs, were under controlled conditions greenhouse experiment. The harvested at...