uid=KBS,o=lter,dc=ecoinformatics,dc=orgalluid=sbohm,o=lter,dc=ecoinformatics,dc=orgallpublicreadhttps://lter.kbs.msu.edu/datasets/176.emlStephenHamiltonMichigan State University

3700 East Gull Lake DriveHickory CornersMI49060

(269) 671-2231(269)671-2104hamilton@msu.edu0000-0002-4702-9017BonnieMcGillMichigan State University

East LansingMichiganUS

mcgillbo@msu.edu0000-0002-5417-3519BonnieMcGillMichigan State University

East LansingMichiganUS

mcgillbo@msu.edu0000-0002-5417-3519principal contact2026-03-14

original data source http://lter.kbs.msu.edu/datasets/176

LTERKBSKellogg Biological StationHickory CornersMichiganGreat Lakesfarmingbiotahttps://apps.usgs.gov/thesaurus/thesaurus-full.php?thcode=15Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director.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-85.404699-85.36685742.42026542.3910192011-01-012017-09-13Kellogg Biological StationData Managerlter.data.manager@kbs.msu.eduhttp://lter.kbs.msu.edu02vkce854KBS LTERprogramNational Science Foundationhttp://dx.doi.org/10.13039/100000001DEB 2224712https%3A%2F%2Fnsf.gov%2Fawardsearch%2FshowAward%3FAWD_ID%3D2224712%26HistoricalAwards%3Dfalsehttps://lter.kbs.msu.edu/datatables/565Kellogg Biological Station LTER: Greenhouse gases dissolved in groundwater used for irrigation at the KBS LTER (KBS127-001)These are measurements of greenhouse gas concentrations (in umol/L) from headspace sampled after groundwater equilibrated with atmospheric air. The ambient air concentrations have already been subtracted. Gives both sampled concentration (gas.umoll.sample) as well as calculated concentration (gas.umoll.equil) of gas expected in water at equilibrium with atmosphere at sample temperature—this is subtracted from the sample concentration as well. For more sampling details see manuscript. These are data collected from irrigation wells around southwest Michigan not just at KBS. But only the KBS observations are used in the total GWI analysis. These were collected in the summer of 2016 and 2017.Grenhouse+gases+disolved+in+groundwater+used+for+irigation+at+the+KBS+LTER.csvNone321\ncolumn,no"\https://lter.kbs.msu.edu/datatables/565.csvsite_idid string unique to a site.id string unique to a site.sitesite namesite nameregionthe region that the site is inthe region that the site is inrepreplicate samplereplicate samplesample_datesample dateYYYY-MN-DD11987-4-18temperature_kwater temperature in degrees Kkelvinrealco2_umoll_sampConcentration of CO2 in water after equilibrium in syringe (umol/l)micromolePerLiterrealch4_umoll_sampConcentration of CH4 in water after equilibrium in syringe (umol/l)micromolePerLiterrealn2o_umoll_sampConcentration of N2O in water after equilibrium in syringe (umol/l)micromolePerLiterrealco2_umoll_equilConcentration of CO2 expected in water in equilibrium with atmosphere (umol/l)micromolePerLiterrealch4_umoll_equilConcentration of CH4 expected in water in equilibrium with atmosphere (umol/l)micromolePerLiterrealn2o_umoll_equilConcentration of N2O expected in water in equilibrium with atmosphere (umol/l)micromolePerLiterrealyearsample yearYYYY11987-4-18https://lter.kbs.msu.edu/datatables/566Kellogg Biological Station LTER: Soil organic carbon and nitrogen data across the Resource Gradient Experiment (KBS127-002)Soil cores were collected in Nov 2016 from 12 plots, 3 cores per plot, and 3 CHN analysis reps per core. These data are the average across the 3 CHN reps. CV among CHN reps were all <0.1, most <0.05. Also provided: bulk density, 2016 crop yield, and soil texture.Soil+organic+carbon+and+nitrogen+data+acros+the+Resource+Gradient+Experiment.csvNone371\ncolumn,no"\https://lter.kbs.msu.edu/datatables/566.csvplotplot numberplot numberdepthcore length in cmcentimeterrealcorecore numbercore numbertreatmentexperimental treatment nameexperimental treatment nameblockreplicate plotreplicate plotis_irrigated't' the plot is irrigated 'f' if it is not't' the plot is irrigated 'f' if it is notc_percenttotal carbon percent in the soil coregramsPerGramrealn_percenttotal nitrogen percent in the soil coregramsPerGramrealbulk_densitysoil bulk densitygramsPerCubicCentimeterrealcrop_yield_2011_to_2016total crop yield from 2011 to 2016kilogramsPerHectarerealcrop_yield_2016wheat yield in 2016kilogramsPerHectarerealyield11_1002011 yield divided by 100 to reduce the numerical instability for the fitting routine2011 yield divided by 100 to reduce the numerical instability for the fitting routineyield16_1002016 yield divided by 100 to reduce the numerical instability for the fitting routine2016 yield divided by 100 to reduce the numerical instability for the fitting routinetotal_carboncalculated from bulk density and carbon percentkilogramsPerSquareMeterrealtotal_nitrogencalculated from bulk density and nitrogen percentkilogramsPerSquareMeterrealsandsand percentgramsPerGramrealsiltsilt percentgramsPerGramrealclayclay percentgramsPerGramrealhttps://lter.kbs.msu.edu/datatables/567Kellogg Biological Station LTER: Soil pH and liming rates (KBS127-003)We’re only using this data to merge the lime treatment info into the CN data set.Soil+pH+and+liming+rates.csvNone381\ncolumn,no"\https://lter.kbs.msu.edu/datatables/567.csvtreatmentN fertilizer treatment, see experimental design: https://lter.kbs.msu.edu/research/long-term-experiments/resource-gradient/N fertilizer treatment, see experimental design: https://lter.kbs.msu.edu/research/long-term-experiments/resource-gradient/group_numberunique groupings of treatment by irrigationunique groupings of treatment by irrigationreplicatereplicates within irrigation treatment. 4 replicates (blocks) of all 9 fert levels rainfed, and another 4x9 irrigatedreplicates within irrigation treatment. 4 replicates (blocks) of all 9 fert levels rainfed, and another 4x9 irrigatedplotplot numberplot numberblockexperimental blockexperimental blockis_irrigated't' if the plot is irrigated, 'f' if it is not.'t' if the plot is irrigated, 'f' if it is not.irrigated_mmgrowing season total mm of irrigation if irrigatedmillimeterrealyearcalendar yearcalendar yearcropcrop rotation: corn, soy, wheatcrop rotation: corn, soy, wheatnfertcornN fertilizer kg/ha treatment in corn years (listed as corn year for all years)kilogramsPerHectarerealnfertactual N fertilizer kg/ha treatment specific to cropkilogramsPerHectarereallimeton"ton/acre lime received (coded for 2012 only, all other years 0)tonsPerAcrereallime_kgkg/ha lime received (coded for 2012 only, all other years 0)kilogramsPerHectarereallime_fulllime ton/acre received, 2012 level coded every yeartonsPerAcrerealhas_lime_appliedreceived lime in 2012? 't'= true, 'f' = falsereceived lime in 2012? 't'= true, 'f' = falsepHpHdimensionlessrealhconcH in H concentration, [H+]= 10^(-pH) molePerLiterrealharvest_datedate the crop was harvestedYYYY-MM-DD11987-4-18crop_yieldcrop yieldkilogramsPerHectarerealhttps://lter.kbs.msu.edu/datatables/569Kellogg Biological Station LTER: Change in soil N2O emissions from irrigation (KBS127-005)Soil greenhouse gases were measured using automated chambers at the RGE in rainfed and irrigated plots simultaneously in 2013, a wheat year. We use only N2O here as CO2 is better measured using eddy flux towers and the CH4 data did not show a significant irrigation effect. N2O concentration was measured four times a day per chamber. These data give a mean concentration per day per chamber. They span May – Sep 2013. Also includes daily precipitation, mean air temperature, lime treatment, and daily irrigation amount.Change+in+soil+N2O+emisions+from+irigation.csvNone331\ncolumn,no"\https://lter.kbs.msu.edu/datatables/569.csvsample_datesample dateYYYY-MM-DD11987-4-18precipitation_mmdaily precip in mmmillimeterrealirrigation_treatmentirrigation treatmentirrigation treatmentwas_limed_in_2012true if the plot was limed in 2012true if the plot was limed in 2012month_numbernumerical monthnumerical monthn_levelN fertilizer level, see experimental design: https://lter.kbs.msu.edu/research/long-term-experiments/resource-gradient/N fertilizer level, see experimental design: https://lter.kbs.msu.edu/research/long-term-experiments/resource-gradient/n_fertilizerN fertilizer in kg/ha in wheat, ***note there is no plot column here because only 1 rep of each N x irr treatmentkilogramsPerHectarerealcompoundcompound measuredcompound measureddoyday of the yearday of the yearflux N2O-N flux g /ha / daygramsPerHectarePerDayrealday_of_monthday of the monthday of the monthair_temp_meandaily mean air tempcelsiusrealnotesirrigation notesirrigation notesirrigation_innote transformed into data, empty cells where no irrigationinchrealLTER_RG_code_archive_for_total_GWI_McGill_2018.RLTER_RG_code_archive_for_total_GWI_McGill_2018.RRhttps://lter.kbs.msu.edu/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsiZGF0YSI6NzUxNCwicHVyIjoiYmxvYl9pZCJ9fQ==--7a95a8ac3f840866781edf2fc32bf21b75aa6627/LTER_RG_code_archive_for_total_GWI_McGill_2018.RFile