IMPACT4SOIL OpenAire CORE (RIOXX-UK Aggregator) Bielefeld Academic Search Engine (BASE) UnpayWall Crossref Microsoft Academic Graph BioEnergy Research Open Access 2008-09-25 Life-cycle assessments (LCAs) of switchgrass (Panicum virgatum L.) grown for bioenergy production require data on soil organic carbon (SOC) change and harvested C yields to accurately estimate net greenhouse gas (GHG) emissions. To date, nearly all information on SOC change under switchgrass has been based on modeled assumptions or small plot research, both of which do not take into account spatial variability within or across sites for an agro-ecoregion. To address this need, we measured change in SOC and harvested C yield for switchgrass fields on ten farms in the central and northern Great Plains, USA (930 km latitudinal range). Change in SOC was determined by collecting multiple soil samples in transects across the fields prior to planting switchgrass and again 5 years later after switchgrass had been grown and managed as a bioenergy crop. Harvested aboveground C averaged 2.5± 0.7 Mg C ha −1 over the 5 year study. Across sites, SOC increased significantly at 0-30 cm (P=0.03) and 0-120 cm (P=0.07), with accrual rates of 1.1 and 2.9 Mg C ha −1 year −1 (4.0 and 10.6 Mg CO2 ha −1 year −1 ), respectively. Change in SOC across sites varied considerably, however, ranging from −0.6 to 4.3 Mg C ha −1 year −1 for the 0-30 cm depth. Such variation in SOC change must be taken into consideration in LCAs. Net GHG emissions from bioenergy crops vary in space and time. Such variation, coupled with an increased reliance on agriculture for energy production, underscores the need for long-term environmental monitor- ing sites in major agro-ecoregions. Carbon sequestration 2. Zero hunger Switchgrass Greenhouse gas balance Renewable Energy, Sustainability and the Environment Plant Sciences 04 agricultural and veterinary sciences 15. Life on land Perennial biofeedstocks 7. Clean energy 01 natural sciences 630 13. Climate action 0401 agriculture, forestry, and fisheries Bioenergy Agronomy and Crop Science Energy (miscellaneous) 0105 earth and related environmental sciences Liebig, Mark A., Schmer, Marty R., Vogel, Kenneth P., Mitchell, Robert B., 2008-09-26 journalpaper Life-cycle assessments (LCAs) of switchgrass (Panicum virgatum L.) grown for bioenergy production require data on soil organic carbon (SOC) change and harvested C yields to accurately estimate net greenhouse gas (GHG) emissions. To date, nearly all information on SOC change under switchgrass has been based on modeled assumptions or small plot research, both of which do not take into account spatial variability within or across sites for an agro-ecoregion. To address this need, we measured change in SOC and harvested C yield for switchgrass fields on ten farms in the central and northern Great Plains, USA (930 km latitudinal range). Change in SOC was determined by collecting multiple soil samples in transects across the fields prior to planting switchgrass and again 5 years later after switchgrass had been grown and managed as a bioenergy crop. Harvested aboveground C averaged 2.5± 0.7 Mg C ha −1 over the 5 year study. Across sites, SOC increased significantly at 0-30 cm (P=0.03) and 0-120 cm (P=0.07), with accrual rates of 1.1 and 2.9 Mg C ha −1 year −1 (4.0 and 10.6 Mg CO2 ha −1 year −1 ), respectively. Change in SOC across sites varied considerably, however, ranging from −0.6 to 4.3 Mg C ha −1 year −1 for the 0-30 cm depth. Such variation in SOC change must be taken into consideration in LCAs. Net GHG emissions from bioenergy crops vary in space and time. Such variation, coupled with an increased reliance on agriculture for energy production, underscores the need for long-term environmental monitor- ing sites in major agro-ecoregions. Soil Carbon Storage By Switchgrass Grown For Bioenergy 10.1007/s12155-008-9019-5 https://doi.org/10.1007/s12155-008-9019-5