Fördelning av organiskt kol och kväve i markprofilen (0-60 cm) i fyra långliggande försök i Sverige Distribution of soil organic carbon and nitrogen concentrations in the soil profiles (0-60 cm) at four long-term experiment sites in Sweden 2025-183-1 SLU.ekol.2025.4.2.IÄ-4 https://doi.org/10.5878/hvp1-6z71 Swedish National Data Service Svensk nationell datatjänst Landing page Fördelning av organiskt kol och kväve i markprofilen (0-60 cm) i fyra långliggande försök i Sverige Distribution of soil organic carbon and nitrogen concentrations in the soil profiles (0-60 cm) at four long-term experiment sites in Sweden 2025-183-1 SLU.ekol.2025.4.2.IÄ-4 https://doi.org/10.5878/hvp1-6z71 oai:slubar.slu.se:94842 10.1007/s00374-018-1281-x 10.1016/j.agee.2025.110004 Bukombe, Benjamin Bukombe, Benjamin Bolinder, Martin Bolinder, Martin Börjesson, Gunnar Börjesson, Gunnar Kätterer, Thomas Kätterer, Thomas O-18-23-048 O-18-23-048 2022-00214 2022-00214 Swedish National Data Service Svensk nationell datatjänst SLU Long-Term Agricultural Experiments Data from the long-term agricultural experiments owned by the Swedish University of Agricultural Sciences (SLU). SLU Agricultural Long-Term Experiments are used to study how crops, crop rotation and management practices affect crop production, crop quality, soil properties and environmental factors in the long term. Data från långliggande jordbruksförsök ägda av Sveriges Lantbruksuniversitet (SLU). På många platser i Sverige har SLU långliggande jordbruksförsök som pågått under flera årtionden. De används för att studera hur växtföljder och odlingsåtgärder inom jordbruket påverkar mark och gröda över tid. Landing page soil carbon storage nitrogen fertilisation long term ecological research soil nitrogen Land use Markanvändning Soil Mark plant nutrition leys subsoil soil organic carbon Farming Areella näringar Environment Miljö This dataset presents the results of a soil sampling field campaign conducted at four sites in Sweden, which constitute the humus balance experimental series. The humus balance experiments include the R3-0020, which contains data for soil organic carbon and nitrogen in cereal cropping systems, and the R3-0021series, which contains data for soil organic carbon and nitrogen in a ley rotation system and This series was established between 1971 and 1980 at Röbäcksdalen, Säby, Lanna, and Lönnstorp, along a climate gradient. The research objective of the study was to study the effect of cropping systems and nitrogen fertilization on soil organic carbon (SOC) and nitrogen (SON) stocks. The main outputs of this field campaign are SOC and N content at different soil depths along the profile. The file contains 560 rows (observations) and 10 columns (variables). Denna datamängd presenterar resultaten från en markprovtagningskampanj som genomfördes på fyra platser i Sverige som ingår i försöksserien Humusbalansförsöken R3-0020 och R-0021. Serien etablerades mellan 1971 och 1980 i Röbäcksdalen, Säby, Lanna och Lönnstorp, längs en klimatgradient. Studien hade som forskningsmål att undersöka effekten av odlingssystem och kvävegödsling på markens organiska förråd av kol och kväve. Huvudresultaten från denna fältkampanj är kol- och kvävehalter på olika markdjup längs markprofilen. Filen innehåller 560 rader (observationer) och 10 kolumner (variabler). 2015-09-15 2020-08-26 Sweden Sverige OtherOther ÖvrigtÖvrigt Numeric Text A sampling campaign was conducted at Lönnstorp (sampled in September 2015) and Lanna (sampled in September 2016) to measure SOC content along the soil profile. The first results of this campaign have been published in Börjesson et al. (2018). To obtain a complete dataset for all sites in the series, samples were collected at two other sites, Röbäcksdalen on 25th June 2019 and Säby on 26th August 2020. During the sampling campaigns at each of the four sites, soil samples were taken in the cereal monoculture where crop residues were retained, and in the ley rotation in the treatments with zero and the highest N fertilization rate. Samples were taken using an auger down to 60 cm depth. Five cores per plot were taken and sliced into nine depth layers, 0-20, 20-22.5, 22.5-25, 25-27.5, 27.5-30, 30-35, 35-40, 40-50, and 50-60 cm. The rationale for the denser sampling in the upper subsoil was to detect potential treatment effects in the transition zone between C-rich topsoil and C-poor subsoil. After drying the soil at 40 degree Celsius, carbon and nitrogen content were determined using the dry combustion method on a LECO CNS analyzer (LECO Corporation, St Joseph, MI 49085, USA) (Bukombe et al., 2026). References Börjesson, G., Bolinder, M.A., Kirchmann, H., Kätterer, T., 2018. Organic carbon stocks in topsoil and subsoil in long-term ley and cereal monoculture rotations. Biol. Fertil. Soils 54, 549–558. https://doi.org/10.1007/s00374-018-1281-x Bukombe, B., Bolinder, M. A., Börjesson, G., Menichetti, L., Lang, R., Paustian, K., & Kätterer, T. (2026). Soil carbon accrual in ley rotations compared with cereal monoculture after four decades at four long-term experiments in Sweden. Agriculture, Ecosystems & Environment, 396, 110004. https://doi.org/10.1016/j.agee.2025.110004A sampling campaign was conducted at Lönnstorp (sampled in September 2015) and Lanna (sampled in September 2016) to measure SOC content along the soil profile. The first results of this campaign have been published in Börjesson et al. (2018). To obtain a complete dataset for all sites in the series, samples were collected at two other sites, Röbäcksdalen on 25th June 2019 and Säby on 26th August 2020. During the sampling campaigns at each of the four sites, soil samples were taken in the cereal monoculture where crop residues were retained, and in the ley rotation in the treatments with zero and the highest N fertilization rate. Samples were taken using an auger down to 60 cm depth. Five cores per plot were taken and sliced into nine depth layers, 0-20, 20-22.5, 22.5-25, 25-27.5, 27.5-30, 30-35, 35-40, 40-50, and 50-60 cm. The rationale for the denser sampling in the upper subsoil was to detect potential treatment effects in the transition zone between C-rich topsoil and C-poor subsoil. After drying the soil at 40 degree Celsius, carbon and nitrogen content were determined using the dry combustion method on a LECO CNS analyzer (LECO Corporation, St Joseph, MI 49085, USA) (Bukombe et al., 2026). References Börjesson, G., Bolinder, M.A., Kirchmann, H., Kätterer, T., 2018. Organic carbon stocks in topsoil and subsoil in long-term ley and cereal monoculture rotations. Biol. Fertil. Soils 54, 549–558. https://doi.org/10.1007/s00374-018-1281-x Bukombe, B., Bolinder, M. A., Börjesson, G., Menichetti, L., Lang, R., Paustian, K., & Kätterer, T. (2026). Soil carbon accrual in ley rotations compared with cereal monoculture after four decades at four long-term experiments in Sweden. Agriculture, Ecosystems & Environment, 396, 110004. https://doi.org/10.1016/j.agee.2025.110004 Non-probabilityNon-probability Icke-sannolikhetsurvalIcke-sannolikhetsurval OtherOther ÖvrigtÖvrigt Field observation, soil sampling, and sample analysis in the laboratoryField observation, soil sampling, and sample analysis in the laboratory Field/Intervention experimentField/Intervention experiment FältexperimentFältexperiment Access to data through SND. Data are freely accessible. Åtkomst till data via SND. Data är fritt tillgängliga. openAccess Börjesson, G., Bolinder, M.A., Kirchmann, H., Kätterer, T., 2018. Organic carbon stocks in topsoil and subsoil in long-term ley and cereal monoculture rotations. Biol. Fertil. Soils 54, 549–558. https://doi.org/10.1007/s00374-018-1281-x Börjesson, G., Bolinder, M.A., Kirchmann, H., Kätterer, T., 2018. Organic carbon stocks in topsoil and subsoil in long-term ley and cereal monoculture rotations. Biol. Fertil. Soils 54, 549–558. https://doi.org/10.1007/s00374-018-1281-x 10.1007/s00374-018-1281-x oai:slubar.slu.se:94842 2018 oai:slubar.slu.se:94842 Bukombe, B., Bolinder, M. A., Börjesson, G., Menichetti, L., Lang, R., Paustian, K., & Kätterer, T. (2026). Soil carbon accrual in ley rotations compared with cereal monoculture after four decades at four long-term experiments in Sweden. Agriculture, Ecosystems & Environment, 396, 110004. https://doi.org/10.1016/j.agee.2025.110004 Bukombe, B., Bolinder, M. A., Börjesson, G., Menichetti, L., Lang, R., Paustian, K., & Kätterer, T. (2026). Soil carbon accrual in ley rotations compared with cereal monoculture after four decades at four long-term experiments in Sweden. Agriculture, Ecosystems & Environment, 396, 110004. https://doi.org/10.1016/j.agee.2025.110004 10.1016/j.agee.2025.110004 2025