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To achieve implementation of sustainable agriculture practices and implement circular bioeconomy in farms, agricultural waste and residuals commonly are used as feedstock for biogas production that is in line with European Union strategy to reduce methane emissions. Anaerobic digestion of feedstock results in production of the digestate. Digestate, on the one hand, is valuable fertilizer that can substitute synthetic fertilizers. On the other hand, it is associated with methane (CH4), ammonia (NH3) emissions and n...

Ammonia as one of the air pollutant mostly originated from agricultural activities, such as manure and soil management. There is a need for precise and reliable quantification of ammonia emissions which is easy applicable on field or laboratory conditions. Cavity ring-down spectroscopy device Picarro G2508 measures ammonia (NH3) concentrations along greenhouse gasses, namely nitrous oxide, methane, carbon dioxide and water vapour content. The aim of the study is to develop methodology for NH3 measurements for Pica...

The Greenhouse gas (GHG) emission reduction is one of goals of environmental policy in climate change context. The accuracy of Soil flux measurements is one of scientific challenges during last decades. The soil flux measurement methodology using gas chromatography is described and commonly used. However cavity ring down spectroscopy is relatively new technology and there is need to research optimal chamber configuration and measurement time. The aim of this study is to evaluate three types of static chamber confi...

Climate change mitigation is a relevant topic in now days. One of the main sources of greenhouse gases (GHG) and air pollutants (including ammonia) emissions that promoting climate change is agriculture sector. Considerable part of GHG and ammonia emissions from agriculture in Baltic region is forming in dairy farms. The aim of the research is to estimate differences between conventional and organic dairy farms in context of GHG and ammonia emissions, taking into account livestock feeding and manure management pra...

The European Union has set a target to cut its greenhouse gas emission levels by 80% to 95% until 2050, if compared to 1990. Agricultural soil is an important carbon store and food provider in the world as well as greenhouse gas emission reducer via carbon sequestration. In order to assess the climate change mitigation effectiveness of the measures, it is necessary to obtain statistically significant data before and after the implementation. The greenhouse gas measurements from soil are commonly determined using s...

The aim of the research is to determine emitted greenhouse gases (GHG) and ammonia emission distinction between two fertilizers types: ammonia nitrate and carbamide (urea). One of the most fertile soils in Latvia are located in Zemgale Region and it is used in research. Samples of tilled soil are used for the research according to the conditions of soil. One of influential factors of the GHG emissions is soil moisture, because humidity in combination with temperature controls the activity of microorganisms and oth...