A5051144536- Soil Carbon and Nitrogen Dynamics
- Soil and Water Nutrient Dynamics
- Peatlands and Wetlands Ecology
- Phosphorus and nutrient management
- Soil and Unsaturated Flow
- Agriculture Sustainability and Environmental Impact
- Composting and Vermicomposting Techniques
- Heavy metals in environment
- Plant nutrient uptake and metabolism
- Crop Yield and Soil Fertility
- Clay minerals and soil interactions
- Organic Food and Agriculture
- Soil Management and Crop Yield
- Plant Micronutrient Interactions and Effects
- Agronomic Practices and Intercropping Systems
- Ruminant Nutrition and Digestive Physiology
- Municipal Solid Waste Management
- Agricultural Innovations and Practices
- Agroforestry and silvopastoral systems
- Wastewater Treatment and Nitrogen Removal
- Wastewater Treatment and Reuse
- Agriculture, Land Use, Rural Development
- Agriculture, Soil, Plant Science
- Odor and Emission Control Technologies
- Botany and Plant Ecology Studies
Swedish University of Agricultural Sciences
2014-2023
University of Georgia
2008
Colorado State University
2008
Seibersdorf Laboratories (Austria)
1999
University of Agricultural Sciences, Dharwad
1995
TU Dortmund University
1978-1979
ABSTRACT Soil structure depends on the association between mineral soil particles (sand, silt, and clay) organic matter, in which aggregates of different size stability are formed. Although chemistry materials, total microbial biomass, enzyme activities particle fractions have been well studied, little information is available populations microhabitats. In this study, topsoil samples fertilizer treatments a long-term field experiment were analyzed. Size 200 to 63 μm (fine sand fraction), 2...
Application of biochar has been shown to increase soil fertility and enable carbon sequestration, indicating potential for agricultural environmental benefits from using locally produced on African smallholder farms. However, previous studies have rather short-term little is known about the longer-term effects application crop yields. Biochar contains ash, but liming effect nutrient release ash may be short-lasting. To investigate long-term effects, we set up a series field trials replicated...
The composition of municipal wastewater and sewage sludge reflects the use proliferation elements contaminants within society. In Sweden, official statistics show that concentrations toxic metals in have steadily decreased, by up to 90 %, since 1970s, due environmental programmes statutory limits on soil. Results from long-term field experiments reduced metal pollution during repeated application has reversed negative trends soil biology. Despite this Swedish success story, organic waste...
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...
Summary In a long‐term field experiment started in 1956 on clay loam soil at Uppsala, Sweden, changes of organic carbon the topsoils receiving various amendments rate 200 kg C ha '1 year were studied to determine matter characteristics, variations δ 13 and estimate balance. Fallow mineral fertilizer without N led significant decrease (SOM) soil, green manure maintained SOM content, animal peat increased content significantly. The stable portion added materials after 37 years continuous input...
Source-separated household organics were composted in a reactor at three oxygen levels, 16%, 2.5% and 1% the compost gas. Short-chained fatty acids initially present material, also produced during mesophilic phase all levels. This indicated that partial anaerobic conditions existed. No NH3 emissions occurred due to acidic conditions. Composting O2 concentrations prolonged reduced microbial activity as compared 16% O2. led delayed decreased of NH3. Nitrous oxide was not formed thermophilic...
Agriculture is a contributor of nitrate to natural waters and there concern about the excess nitrogen burden loadings from agriculture on waters. Agricultural practices that reduce leaching arable land are needed. It postulated by certain groups organic farming among other environmental benefits. The objectives this paper are: (1) compile, summarize critically analyse information NO3-N systems were managed according principles; (2) compare with conventional systems. This review consists...
The present study combined a physical fractionation procedure with the natural abundance of 13 C (δ C) to evaluate effect organic fertilizer applications, mineral fertilization, and fallow on changes in (C org ) associated different particle‐size fractions. long‐term agricultural field experiment was conducted since 1956 Ultuna, Sweden, Eutric Cambisol. Organic both bulk soil samples size fractions changed significantly 1956. Fallow plots lost approximately one‐third their from topsoil layer...
Summary We studied the quantitative and qualitative changes of soil organic matter (SOM) due to different land uses (arable versus grassland) treatments (organic manure mineral fertilizer) within an agricultural crop rotation in a long‐term field experiment, conducted since 1956 at Ultuna, Sweden, on Eutric Cambisol. The carbon (OC) content grassland plot was 1.8 times greater than that similarly fertilized Ca(NO 3 ) 2 treated cropped plots. comparison two dispersion techniques (a low‐energy...