uid=KBS,o=lter,dc=ecoinformatics,dc=orgalluid=sbohm,o=lter,dc=ecoinformatics,dc=orgallpublicreadhttps://lter.kbs.msu.edu/datasets/206.emlG.RobertsonMichigan State University

3700 East Gull Lake DriveHickory CornersMI49060US

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

Hickory CornersMichigan49060US

(269) 671-2242wilkebro@msu.edu0000-0001-6746-5206principal contact2026-06-12

original data source http://lter.kbs.msu.edu/datasets/206

LTERKBSKellogg Biological StationHickory CornersMichiganGreat LakesPrimary ProductionPopulationsInorganic NutrientsLTER 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Areafarmingbiotahttps://apps.usgs.gov/thesaurus/thesaurus-full.php?thcode=15Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director.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-85.404699-85.36685742.42026542.3910192021-10-052025-11-03Kellogg Biological StationData Managerlter.data.manager@kbs.msu.eduhttp://lter.kbs.msu.edu02vkce854KBS LTERhttps://lter.kbs.msu.edu/datatables/690Kellogg Biological Station LTER: LTAR yield data (LTAR002-001)Yield data from the KBS Long-term Agroecosystem Research Fields and PlotsLTAR+yield+data.csvNone371\ncolumn,no"\https://lter.kbs.msu.edu/datatables/690.csvharvest_datethe day the harvest started and normally also endedYYYY-MM-DD11987-4-18treatmentLTAR treatmentLTAR treatmentreplicatereplicate within a treatmentintegersubplotthe subplot sampledthe subplot sampledcropNominal Crop nameNominal Crop namespeciesthe mix of species plantedthe mix of species plantedfractionharvested plant fractionharvested plant fractionvarietieslist of planted varietieslist of planted varietiestransgenic_traitstransgenic traits of the varieties plantedtransgenic traits of the varieties plantedseed_treatmentseed treatments applied to cropseed treatments applied to cropharvest_area_haharvested areahectarerealdry_matter_yield_kg_hadry matter yield calculated at 0% moisturekilogramsPerHectarerealplot_typeLTAR plot, field or prairie stripLTAR plot, field or prairie stripyield_bu_acagronomic yield in bushel per acre at standard moisture (15.5% for corn, 13 % for soybean and wheatbushelPerAcrerealyield_short_ton_acyield in short tons per acre at standard moisture (15.5 % for corn, 13% for wheat and soybean and 15 % for forages)tonsPerAcrerealcommentcomments about the observationcomments about the observationhttps://lter.kbs.msu.edu/datatables/691Kellogg Biological Station LTER: LTAR crop stand count data (LTAR002-002)Stand count data from the KBS Long-term Agroecosystem ExperimentLTAR+crop+stand+count+data.csvNone251\ncolumn,no"\https://lter.kbs.msu.edu/datatables/691.csvsample_datedate of samplingdatetimetreatmentLTAR treatmentLTAR treatmentreplicatereplicate of a treatmentintegercrop_speciesThe crop planted in the yearThe crop planted in the yearhttps://lter.kbs.msu.edu/datatables/756Kellogg Biological Station LTER: Forage Quality (LTAR002-003)Forage quality is an important measure of the value of a crop for livestock consumption. We measure a variety of quality indicators that are summarised in this table. Samples are collected when the biomass is removed from the field, For forages this might be a few days after the crop is cut. Forage+Quality.csvNone471\ncolumn,no"\https://lter.kbs.msu.edu/datatables/756.csvtreatmentField treatmentField treatmentreplicatefield replicatefield replicateharvest_datedate the material was harvested. YYYY-MM-DD11987-4-18collection_datethe date the biomass was removed from the field. Forages are often cut and then dried in the field before they are baled and removed from the field.YYYY-MM-DD11987-4-18fractioncrop fraction removedcrop fraction removeddry_matter_kg_hacrop yield as dry matterkilogramsPerHectarerealdmdry mattergramsPerHectogramrealcpCrude ProteingramsPerHectogramrealadfAcid detergent fibergramsPerHectogramrealandfneutral detergent fibergramsPerHectogramrealcainorganic calciumgramsPerHectogramrealpphosphorusgramsPerHectogramrealkpotassiumgramsPerHectogramrealmgMagnesiumgramsPerHectogramrealdndf48digestible neutral detergent fiber 48 hoursgramsPerHectogramrealivtdmd48in-vitro true dry matter digestibility 48 hoursgramsPerHectogramrealndfd48neutral detergent fiber digestibility 48 hours ?gramsPerHectogramrealashashgramsPerHectogramrealfatfatgramsPerHectogramrealligninLigningramsPerHectogramrealstarchstarchgramsPerHectogramrealescsugarsgramsPerHectogramrealfructanfructangramsPerHectogramrealwscwater soluble carbohydratesgramsPerHectogramrealadicpacid detergent insoluble crude proteingramsPerHectogramrealndicpneutral detergent insoluble crude proteinneutral detergent insoluble crude proteinandformneutral detergent fiber ash freegramsPerHectogramrealbarcodeinternal KBS-LTAR barcode to refer to this particular sampleinternal KBS-LTAR barcode to refer to this particular samplehttps://lter.kbs.msu.edu/datatables/760Kellogg Biological Station LTER: N15 content of selected plant biomass samples (LTAR002-004)Natural abundance N15 measurements were made to estimate the amount of N fixation in different cropping systems. N15+content+of+selected+plant+biomas+samples.csvNone251\ncolumn,no"\https://lter.kbs.msu.edu/datatables/760.csvsample_datethe date the plants were sampledYYYY-MM-DD11987-4-18treatmentthe field treatment sampledthe field treatment sampledreplicatethe replicate sampledthe replicate sampledspeciesthe species sampledthe species sampleddelta_n15the measured dleta N15 value in ppbrealgeometrythe plot polygon as well known textthe plot polygon as well known texthttps://lter.kbs.msu.edu/datatables/821Kellogg Biological Station LTER: LTAR crop mycotoxin data (LTAR002-005)This datatable includes mycotoxin concentrations measured at the time of crop harvest.LTAR+crop+mycotoxin+data.csvNone251\ncolumn,no"\https://lter.kbs.msu.edu/datatables/821.csvfractionsampled crop fractionsampled crop fractiondeoxynivalenoldeoxynivalenol concentrationmilligramsPerKilogramrealhttps://lter.kbs.msu.edu/datatables/846Kellogg Biological Station LTER: Plant CN content (LTAR002_006)Plant total carbon and nitrogen data from the LTAR fields and plots.Plant+CN+content.csvNone271\ncolumn,no"\https://lter.kbs.msu.edu/datatables/846.csvsample_datethe date the sample was removed from the fieldYYYY-MM-DD11987-4-18treatmentThe treatment sampledThe treatment sampledreplicatethe replicate sampledthe replicate sampledspeciesthe plant species sampledthe plant species sampledfractionthe fraction of the plant analyzedthe fraction of the plant analyzedc_amountthe percent of carbon in the samplegramsPerHectogramrealn_amountthe percent Nitrogen in the samplegramsPerHectogramrealsample_idinternal sample idinternal sample id