A5058004172- Soil and Water Nutrient Dynamics
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Peatlands and Wetlands Ecology
- Phosphorus and nutrient management
- Soil Carbon and Nitrogen Dynamics
- Soil Geostatistics and Mapping
- Water Quality and Pollution Assessment
- Aquatic Ecosystems and Phytoplankton Dynamics
- Soil and Unsaturated Flow
- Constructed Wetlands for Wastewater Treatment
- Wastewater Treatment and Nitrogen Removal
- Hydrology and Sediment Transport Processes
- Groundwater and Isotope Geochemistry
- Scientific Research and Discoveries
- Isotope Analysis in Ecology
- Marine and fisheries research
- Sustainable Agricultural Systems Analysis
- Mine drainage and remediation techniques
- Organic Food and Agriculture
- Coastal wetland ecosystem dynamics
- Marine Bivalve and Aquaculture Studies
- Food Waste Reduction and Sustainability
- Heavy metals in environment
- Science and Climate Studies
Swedish University of Agricultural Sciences
2015-2025
Uppsala University
2022
IVL Swedish Environmental Research Institute
2005-2006
University of Maryland, College Park
1999
University of Mary
1999
The series of papers in this issue AMBIO represent technical presentations made at the 7th International Phosphorus Workshop (IPW7), held September, 2013 Uppsala, Sweden. At that meeting, 150 delegates were involved round table discussions on major, predetermined themes facing management agricultural phosphorus (P) for optimum production goals with minimal water quality impairment. six (1) P a changing world; (2) transport pathways from soil to water; (3) monitoring, modeling, and...
Phosphorus losses from arable soils contribute to eutrophication of freshwater systems. In addition through surface runoff, leaching has lately gained increased attention as an important P transport pathway. Increased levels in have highlighted the necessity establishing a relationship between actual and soil levels. this study, we measured total phosphorus (TP) dissolved reactive (DRP) during three years undisturbed columns five soils. The were collected at sites, established 1957 1966,...
In this paper, we outline several recent insights for the priorities and challenges future research reducing phosphorus (P) based water eutrophication in agricultural landscapes of Northwest Europe. We highlight that new efforts best be focused on headwater catchments as they are a key influence initial chemistry larger river catchments, here many management interventions most effectively made. emphasize lack understanding how climate change will impact P losses from landscapes....
Eutrophication, a major problem in many fresh and brackish waters, is largely caused by nonpoint-source pollution P from agricultural soils. This lysimeter study examined the influence of content, physical properties, sorption characteristics topsoil subsoil on leaching measured during 21 mo 1-m-long, undisturbed soil columns two clay sandy Total losses period varied between 0.65 7.40 kg ha. Dissolved reactive was dominant form leachate soils one soil, varying 48 to 76%. Particulate...
Transport of phosphorus (P) from agricultural fields to water bodies deteriorates quality and causes eutrophication. To reduce P losses optimize use efficiency by crops, better knowledge is needed turnover in soil the best management practices (BMPs). In this review, we examined these issues using results 10 Swedish long-term fertility trials various studies on subsurface P. The are more than 50 years old consist two cropping systems with farmyard manure mineral fertilizer. One major finding...
Abstract The effects of soil type, crop rotation, fertilizer type and application rate on the composition organic phosphorus ( P ) compounds in soils from four sites a S wedish long‐term experiment were investigated with 31 ‐ NMR . Soil textures loamy sand, sandy loam, silty clay loam clay. Phosphorus has been added to since 1950s 1960s at different rates form either mineral or combination manure fertilizer. Results show that receiving no addition, most was present phosphate monoesters...
The importance of subsoil features for phosphorus (P) leaching is frequently mentioned, but effects are still poorly documented. This study examined whether the four agricultural Swedish soils (two sand and two clay) functioned as a source or sink P by measuring from intact soil columns with topsoil (1.05 m deep) without (0.77 over 3 yr. One sandy high content (Olsen P, 84 mg kg) sorption capacity (P index [PSI], 3.7 mmol had low dissolved reactive (DRP) full-length lysimeters (0.12 0.08 kg...
Excessive phosphorus (P) inputs from agriculture are well established as a contributor to freshwater eutrophication. Decreasing these is an important step in improving the ecological state of impaired waters. Particulate P (PP) significant diffuse agricultural catchments. Identifying main correlates for PP losses reducing inputs. However, there few studies long term temporal and spatial dynamics streams. Here, we investigate relative importance hydrology, catchment characteristics...
Abstract. Agricultural headwater streams are important pathways for diffuse sediment and nutrient losses, requiring mitigation strategies beyond in-field measures to intercept the transport of pollutants downstream freshwater resources. As such, floodplains can be constructed along existing agricultural ditches improve fluvial stability promote deposition sediments particulate phosphorus. In this study, we evaluated 10 remediated in Sweden their capacity reduce phosphorus export investigated...
Diffuse phosphorus (P) mitigation in agricultural catchments should be targeted at critical source areas (CSAs) that consider and transport factors. However, development of CSA identification needs to the mobilisation potential legacy soil P sources field scale, control (micro)topography on runoff generation hydrological connectivity sub-field scale. To address these limitations, a 'next generation' scale index is presented, which predicts risk dissolved losses from P. The GIS-based Index...
Nutrient losses from headwater catchments (<50 km2) cause eutrophication problems downstream. Catchment properties are strongly reflected in the levels of nutrient concentrations streams. Based on measurements total and dissolved nitrogen (TN, DN) phosphorus (TP, DP) 235 small streams, we showed that proportion arable land a catchment had strongest positive effect concentrations, with coefficient determination (R2) 0.54, 0.64, 0.45, 0.51 for TN, DN, TP, DP, respectively. In contrast,...
To improve water quality and reduce instream erosion, floodplain remediation along agricultural streams can provide multiple ecosystem services through biogeochemical fluvial processes. During inundation, longer residence time periodic anoxic conditions lead to increased nitrogen (N) removal denitrification but also mobilization of phosphorus (P), impeding overall improvements. investigate the capacity for N P processing in remediated streams, we measured potential nitrous oxide production...
Abstract Phosphorus (P) is the limiting nutrient for primary production in most freshwater ecosystems. The magnitude of P leaching from agricultural soils therefore critical. Preferential flow has been proposed as a major cause high losses structured clay soils. Undisturbed soil two texturally different soils, that is, day which preferential was expected to be main mode water transport and sandy where piston dominant process, were used this study. Use labeled made it possible determine...
Combating eutrophication requires changes in land and water management agricultural catchments implementation of mitigation measures to reduce phosphorus (P), nitrogen (N) suspended sediment (SS) losses. To date, such have been built many catchments, but there is a lack studies evaluating their effectiveness. Here we evaluated the effectiveness clay soil‐dominated headwater catchment by combining evaluation long‐term high‐frequency data with punctual measurements upstream downstream three...
Abstract. The practice of large phosphorus (P) additions to agricultural land has resulted in an increased depletion limited mineable rock phosphate resources, P accumulation soils with risk for losses, and intensified eutrophication deterioration water quality recipient bodies. A number measures have been used reach balance between inputs outputs systems, the goal achieving improved use efficiency, sustained high crop yields reduced losses. This paper discusses how this may be achieved....
Concentrations of phosphorus (P), the main limiting nutrient in freshwater ecosystems, need to be reduced, but this is difficult due high spatial and temporal variations limited resources. Reliable targeting critical source areas, such as erosion-prone fields parts fields, necessary improve cost efficiency mitigation measures. We used high-resolution (2 m × 2 m) distributed modelling calculate erosion risk for a large area (202 279 km2) covering > 90% Swedish arable land. Comparison model...
Phosphorus losses from arable land need to be reduced prevent eutrophication of surrounding waters. Owing the high spatial variability P losses, cost-effective countermeasures target parts catchment that are most susceptible losses. Field surveys identified critical source areas for overland flow and erosion amounting only 0.4–2.6 % total in four different catchments southern Sweden. Distributed modelling using high-resolution digital elevation data 72–96 these observed features. The results...
The evolution of phosphorus (P) management decision support tools (DSTs) and systems (DSS), in food environmental security has been most strongly affected developed regions by national strategies (i) to optimize levels plant available P agricultural soils, (ii) mitigate runoff water bodies. In the United States, Western Europe, New Zealand, combinations regulatory voluntary strategies, sometimes backed economic incentives, have often driven reactive legislation protect Farmer‐specific DSSs,...
ABSTRACT Phosphorus (P) is one of the main nutrients controlling algal production in aquatic systems. Proper management P agricultural systems can greatly enhance our ability to combat pollution environments. To address this issue, a decision support system (DSS) consisting Maryland Index (PI), diagnosis expert (ES), prescription ES, and nonpoint‐source model, Ground Water Loading Effects Agricultural Management Systems (GLEAMS), was developed applied an watershed southern Sweden. This...
Abstract. Preferential flow may enhance phosphorus transport through the soil profile and thereby increase risks for eutrophication of watercourses. Destruction continuous macropores in topsoil by tillage provides possibility better contact between particles P fertilizer. This is facilitated incorporation rather than surface application fertilizer, which should reduce risk rapid from unsaturated zone. To test this hypothesis, undisturbed monoliths (0.295 m diameter 1.2 length) were collected...
Phosphorus losses from arable soils contribute to eutrophication of freshwater systems. In addition through surface runoff, leaching has lately gained increased attention as an important P transport pathway. Increased levels in have highlighted the necessity establishing a relationship between actual and soil levels. this study, we measured total phosphorus (TP) dissolved reactive (DRP) during three years undisturbed columns five soils. The were collected at sites, established 1957 1966,...