uid=KBS,o=lter,dc=ecoinformatics,dc=orgalluid=sbohm,o=lter,dc=ecoinformatics,dc=orgallpublicreadhttps://lter.kbs.msu.edu/datasets/119.emlG.RobertsonMichigan State University

3700 East Gull Lake DriveHickory CornersMI49060US

(269) 760-8364(269)671-2351robert30@msu.edu0000-0001-9771-98952026-04-10

original data source http://lter.kbs.msu.edu/datasets/119

LTERKBSKellogg Biological StationHickory CornersMichiganGreat LakesorganicmatterphosphorusmagnesiumPOMsoilpotassiumchemistrypHcationexchangecapacityInorganic NutrientsDisturbanceOrganic MatterLTER Core Research Areafarmingbiotahttps://apps.usgs.gov/thesaurus/thesaurus-full.php?thcode=15Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director.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-85.404699-85.36685742.42026542.3910192008-01-012017-12-07Kellogg Biological StationData Managerlter.data.manager@kbs.msu.eduhttp://lter.kbs.msu.edu02vkce854KBS LTERSoils of the GLBRC Biofuel Cropping System Experiment (BSCE) and Scale-Up Experiment are sampled to measure and monitor a variety of physical and chemical factors, including soil bulk density, texture, pH, moisture, organic carbon, inorganic nitrogen, and several other nutrients. Both surface and deep-core soil samples are collected. Currently surface samples to 25 cm are collected in annual crop treatments on an annual basis and analyzed for inorganic nitrogen and for fertilizer recommendations and collected in perennial crop treatments every three years. Deep-core sampling to 1 meter occurs every 5 to 10 years to primarily examine long-term changes in organic carbon and nitrogen.Data Managerhttp://lter.kbs.msu.edu/protocols/158Soil total carbon and nitrogen as well as the ratio of C:N are important attributes of soil fertility. Both total C and N are measured by a combustion method that does not differentiate between organic and inorganic forms of the elements. In most soils, inorganic N is a tiny fraction of total N so total N is synonymous with organic N. Inorganic C, on the other hand, can be a significant portion of total C in soils with carbonate minerals. Extensive testing of KBS surface soils has shown soil inorganic C to be non-detectable; thus total C in KBS surface soils is synonymous with total organic carbon (TOC). However, carbonates may still be present in deep or recently limed soils, which must be tested for inorganic carbon and, if present, the carbonates removed via acid fumigation (described below) prior to total C analysis. Inorganic C can also be analyzed separately via the inorganic C protocol. To measure total C and N, subsamples of dried, finely ground soil are weighed into small foil capsules that are combusted in an automated CHN analyzer that measures the amount of released CO2 and N2 by gas chromatography. Final values are expressed as the percentage of carbon or nitrogen in dry soil. If inorganic C has been confirmed to be absent, removed, or analyzed separately and subtracted, values can be expressed as total organic C. Sampling frequency depends on experiment and research objectives. Since 2001, soils of the LTER Main Cropping System Experiment are analyzed for total C and N as part of the decadal deep soil core (whole profile) sampling program, usually in late fall of wheat years.Data Managerhttp://lter.kbs.msu.edu/protocols/37The Costech Elemental Combustion System 4010 is an automated combustion analyzer used to determine total carbon and nitrogen in soil and plant samples. This system employees a helium carrier gas to bring combustion gases to a gas chromatographic separation column and thermal conductivity detector. More information about the analyzer can be obtained from Costech Analytical Technologies (26074 Avenue Hall, Suite 13, Valencia, CA 91355 – USA or http://www.costechanalytical.com/) For preparation and analysis of plant material, see https://lter.kbs.msu.edu/protocols/40. For preparation and analysis of soil, see https://lter.kbs.msu.edu/protocols/37.Data Managerhttp://lter.kbs.msu.edu/protocols/148https://lter.kbs.msu.edu/datatables/364Kellogg Biological Station LTER: Soil Chemistry from Deep Cores (KBS093-002)Deep core soil samples analyzed for pH, lime index, phosphorus, potassium, calcium, magnesium, cation exchange capacity and organic matter. KBS samples are analyzed by the Michigan State University Soil and Plant Nutrient Laboratory .Soil+Chemistry+from+Dep+Cores.csvNone341\ncolumn,no"\https://lter.kbs.msu.edu/datatables/364.csvsample_datedate the soil core was collectedYYYY-MM-DD11987-4-18treatmentexperimental treatmentexperimental treatmentreplicatereplicate nested within treatmentreplicate nested within treatmentmain_or_microplotwhether the main or the microplot was sampledwhether the main or the microplot was sampledcampaigntype of soil samplingtype of soil samplingtop_depthupper soil sampling depthcentimeterintegerbottom_depthlower soil sampling depthcentimeterintegerphpH of soil solutiondimensionlessreallime_indexindicator of potential acidityrealp_ppmphosphorus concentrationmilligramsPerKilogramrealk_ppmpotassium concentrationmilligramsPerKilogramrealca_ppmcalcium concentrationmilligramsPerKilogramrealmg_ppmmagnesium concentrationmilligramsPerKilogramrealest_ceccation exchange capacity in meq/100g soilmilliEquivalentsPerHundredGramrealom_percentorganic matter percentgramsPerHectogramrealhttps://lter.kbs.msu.edu/datatables/396Kellogg Biological Station LTER: Soil Horizons- Deep Core samples (KBS093_005)Soil horizons of the GLBRC BCSE (Biofuel Cropping System Experiment) site. Soil core was collected with the deep core sampler.Soil+Horizons-+Dep+Core+samples.csvNone271\ncolumn,no"\https://lter.kbs.msu.edu/datatables/396.csvsample_datesampling dateYYYY-MM-DD11987-4-18treatmentexperimental treatmentexperimental treatmentreplicatereplicate nested within treatmentreplicate nested within treatmentstationsampling stationsampling stationtop_depthtop depth of soil samplecentimeterrealbottom_depthbottom depth of soil samplecentimeterrealhorizonsoil horizon namesoil horizon namecommentsnotes specific to data rownotes specific to data row