uid=KBS,o=lter,dc=ecoinformatics,dc=orgalluid=sbohm,o=lter,dc=ecoinformatics,dc=orgallpublicreadhttps://lter.kbs.msu.edu/datasets/214.emlG.RobertsonMichigan State University

3700 East Gull Lake DriveHickory CornersMI49060US

(269) 760-8364(269)671-2351robert30@msu.edu0000-0001-9771-9895NevilleMillarMichigan State University

3700 E Gull Lake DrHickory CornersMI49060US

millarn@msu.edu0000-0003-0297-0804IlyaGelfandBen-Gurion University of the Negev

Sede Boqer Campus849900IL

igelfand@bgu.ac.il0000-0002-8576-0978KevinKahmarkMichigan State University

3700 East Gull Lake DriveHickory CornersMI49060US

269-671-2330kahmark@msu.eduprincipal contactRandyJacksonUniversity of Wisconsin

US

(608)262-1390rdjackson@wisc.edu0000-0002-8033-1250original investigator2026-06-07

original data source http://lter.kbs.msu.edu/datasets/214

LTERKBSKellogg Biological StationHickory CornersMichiganGreat LakesfluxtracegasDisturbanceLTER Core Research Areatrace gas chamber nitrous oxide carbon methanefarmingbiotahttps://apps.usgs.gov/thesaurus/thesaurus-full.php?thcode=15Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director. These restrictions are intended mainly to preserve the primary investigators' rights to first publication and to ensure that data users are aware of the limitations that may be associated with any specific data set. These restrictions apply to both the baseline data set and to the data sets associated with specific LTER-supported subprojects.All publications of KBS data and images must acknowledge KBS LTER support.The areas around the Kellogg Biological Station in southwest Michigan-85.404699-85.36685742.42026542.3910192009-05-152017-12-02Kellogg Biological StationData Managerlter.data.manager@kbs.msu.eduhttp://lter.kbs.msu.edu02vkce854KBS LTERAgricultural soils can serve as both sources and sinks of greenhouse gases (GHGs). To measure the flux of biogenic GHGs (CO2, CH4, and N2O) from soil, we use static flux chambers and withdraw four gas samples over the course of an hour to determine changes in chamber gas concentration over that time interval. CH4 and N2O are determined by gas chromatography; CO2 by either infrared gas analysis or spectroscopy. Fluxes are expressed as grams or kilograms of elemental gas per hectare per day. Sampling Frequency: Depends on the experiment, time of year, and research objective. As part of our sampling program of the LTER Main Cropping System Experiment (MCSE), GHG fluxes are measured weekly to monthly throughout the growing season (since 1991) and monthly throughout the winter (since 2013). Fluxes are often episodic and associated with major agronomic events like tillage and fertilization.Data Managerhttp://lter.kbs.msu.edu/protocols/113The amount of water or moisture in a given mass of soil is highly variable and is important to measure in field studies because it affects microbial activity, nutrient movement, and plant growth. To measure soil moisture content by the gravimetric method, a subsample of a fresh, sieved composite sample or a fresh soil core is weighed, oven dried until there is no further mass loss, and then reweighed. The moisture content is expressed as mass of water per mass of dry soil. Sampling frequency: Depends on experiment and research objective. Soil moisture is routinely measured as part of our LTER core soil sampling for inorganic N, N mineralization, and greenhouse gas fluxes.Data Managerhttp://lter.kbs.msu.edu/protocols/24Board of Regents of the University of Wisconsin System, operating as University of Wisconsin-Madison, Madison, WIprogramU.S. Department of Energyhttp://dx.doi.org/10.13039/100000015DE-SC0018409https%3A%2F%2Fpamspublic.science.energy.gov%2FWebPAMSExternal%2FInterface%2FCommon%2FViewPublicAbstract.aspx%3Frv%3Dadb8e0e1-b281-416b-9ad7-18f5a6f94739%26rtc%3D24%26PRoleId%3D10https://lter.kbs.msu.edu/datatables/211Kellogg Biological Station LTER: Greenhouse Gas Fluxes (GLBRC085-002)Fluxes of N2O, CO2, and CH4 from soils of all fields of the GLBRC Scale-up Experiment using static chambers. Fluxes are corrected to the 3-meter air temperature at 10 am on the day chamber gases were sampled.Grenhouse+Gas+Fluxes.csvNone271\ncolumn,no"\https://data.sustainability.glbrc.org/datatables/211.csvsample_datedate sample was collectedYYYY-MM-DD11987-4-18treatmentexperimental treatmentexperimental treatmentreplicatereplicate nested within treatmentreplicate nested within treatmentchambergas flux chamber numberintegern2o_nNitrous oxide N gas fluxgramsPerHectarePerDayrealco2_cCO2 C gas fluxgramsPerHectarePerDayrealch4_cCH4 C gas fluxgramsPerHectarePerDayrealtemperatureAir temperature at 10 am (3 m)celsiusrealhttps://lter.kbs.msu.edu/datatables/330Kellogg Biological Station LTER: Soil Temperature at Greenhouse Gas Sampling (GLBRC085-004)Soil temperature measured at 1 inch below the soil surface during sampling of greenhouse gases from static chambers.Soil+Temperature+at+Grenhouse+Gas+Sampling.csvNone241\ncolumn,no"\https://data.sustainability.glbrc.org/datatables/330.csvsample_datedate measuredYYYY-MM-DD11987-4-18treatmentexperimental treatmentexperimental treatmentreplicatereplicate nested within treatmentreplicate nested within treatmentchamberchamber number integersoil_temperaturesoil temperaturecelsiusrealhttps://lter.kbs.msu.edu/datatables/522Kellogg Biological Station LTER: Soil Moisture at Greenhouse Gas Sampling (GLBRC085-006)Gravimetric soil moisture of surface soil samples (0-25 cm) taken once in each plot during each gas sampling campaign.Soil+Moisture+at+Grenhouse+Gas+Sampling.csvNone251\ncolumn,no"\https://data.sustainability.glbrc.org/datatables/522.csvsample_dateThe day the sample was takenYYYY-MM-DD11987-4-18SiteThe site the sample was taken fromThe site the sample was taken fromtreatmentThe plot treatment designationThe plot treatment designationreplicateThe replicate designationThe replicate designationchamberchamber that the sample is associated withchamber that the sample is associated withmoisturegravimetric soil moisture measured in % (weight/weight)gramsPerGramreal