uid=KBS,o=lter,dc=ecoinformatics,dc=orgalluid=sbohm,o=lter,dc=ecoinformatics,dc=orgallpublicreadhttps://lter.kbs.msu.edu/datasets/35.emlNicholasHaddadMichigan State University

3700 E Gull Lake DriveHickory Corners49060US

haddad@kbs.msu.edu0000-0002-1591-9322StaceyVanderWulpMichigan State University

3700 East Gull Lake DriveHickory CornersMI49060US

(269) 671-2339(269) 671-2333vanderws@msu.eduprincipal contactG.RobertsonMichigan State University

3700 East Gull Lake DriveHickory CornersMI49060US

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

3700 East Gull Lake DriveHickory CornersMI49060

(269) 671-2528(269)671-2104simmonsj@kbs.msu.eduprincipal contact2026-04-12

original data source http://lter.kbs.msu.edu/datasets/35

LTERKBSKellogg Biological StationHickory CornersMichiganGreat LakesbiomassprimaryproductionagronomyyieldyieldPrimary ProductionPopulationsDisturbanceLTER Core Research Areayield soil moisturefarmingbiotahttps://apps.usgs.gov/thesaurus/thesaurus-full.php?thcode=15Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director.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-85.404699-85.36685742.42026542.3910192000-05-032020-10-15Kellogg Biological StationData Managerlter.data.manager@kbs.msu.eduhttp://lter.kbs.msu.edu02vkce854KBS LTERSampling Frequency: minimum of once per year Harvestable biomass in each cropped plot is measured at the time of crop harvest. For grains, the agricultural grain harvester is fitted with a GPS-referenced yield monitoring system to provide yield maps for each 1 ha treatment plot. Additionally, grain is off-loaded into weigh wagons and weighed at the KBS dairy . Alfalfa and wheat straw is measured on a gravimetric basis per plot after it has been cut and baled. Gravimetric moisture content is measured and subtracted from the biomass and the harvestable biomass estimate presented as dry weight alfalfa or straw per area.Data Managerhttp://lter.kbs.msu.edu/protocols/29Agronomic yields are defined as the crop grain and non-grain biomass harvested in a given growing cycle and serve as the basic measurement for comparing production differences among treatments. For annual row-cropping systems of corn, soybean and wheat, yield is determined as the grain biomass collected during harvest; for annual sorghum, yield is determined as the non-grain biomass harvested. For perennial crops, including monoculture systems, such as switchgrass and miscanthus, and polyculture systems that are harvested annually, such as restored prairie, native grasses,and early successional (GLBRC only), yield is determined as the biomass harvested at the end of the growing season. For alfalfa, harvested several times per year, yield is the sum of biomass harvested over the growing season. For woody cropping systems of short-rotation poplar, annual yield is determined as the biomass collected at clear-cutting divided by the number of years of growth. Crops are harvested using commercial sized equipment; for the specific harvesters and equipment used see the Agronomic Activity Report (KBS004-012) or search the Ag-log at https://aglog.kbs.msu.edu/ for Harvest under the Observations tab. Data Managerhttp://lter.kbs.msu.edu/protocols/194programNational 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/75Kellogg Biological Station LTER: Agronomic Yields (KBS032-001)Agronomic grain yields of corn, soybean, and wheat, at standard moisture, over the duration of the Biodiversity Gradient Experiment (2000-2019) and dry matter (0% moisture) yields of sorghum planted in 2020 to examine the experimental residual effects on crop production. Yields are measured before the regular harvest by harvesting a section within each plot with a plot combine.Agronomic+Yields.csvNone291\ncolumn,no"\https://lter.kbs.msu.edu/datatables/75.csvDatedate of harvestYYYY-MM-DD11987-4-18Cropcrop harvestedcrop harvestedPlotplot IDplot IDTreatmenttreatment IDtreatment IDsystemSystem codeSystem codedescriptionrotation descriptionrotation descriptionYield_bu_Agrain yield in bushel per acre at standard moisture (13% for winter wheat and soybeans, and 15% for corn)bushelPerAcre0.5realYield_kg_hagrain yield in kilograms per hectare at standard moisture (13% for winter wheat and soybeans, and 15% for corn, 0% for sorghum)kilogramsPerHectare20.0realYearyear of the observationYYYY11987-4-18https://lter.kbs.msu.edu/datatables/295Kellogg Biological Station LTER: Narrative Agronomic Log (KBS032-002)A narrative of the agronomic activities on the Biodiversity Gradient ExperimentNarative+Agronomic+Log.csvNone221\ncolumn,no"\https://lter.kbs.msu.edu/datatables/295.csvObs_dateobservation dateYYYY-MM-DD11987-4-18Commentdescription of the agronomic eventdescription of the agronomic eventAuthorauthor of the observationauthor of the observationhttps://lter.kbs.msu.edu/datatables/296Kellogg Biological Station LTER: Expanded Agronomic Log (KBS032-003)An expanded log of agronomic activities on the Biodiversity Gradient Experiment.Expanded+Agronomic+Log.csvNone281\ncolumn,no"\https://lter.kbs.msu.edu/datatables/296.csvobs_dateobservation dateYYYY-MM-DD11987-4-18treatmenttreatment of which the observation pertains treatment of which the observation pertains commentdescription of agronomic eventdescription of agronomic eventnameplot nameplot namematerialmaterial usedmaterial usedraterate of applicationrate of applicationunitsunit of the rate of applicationunit of the rate of applicationequipmentequipment usedequipment usedobservationobservation id in the aglog (for further information on the record go to http://aglog.kbs.msu.edu/observations/#id)observation id in the aglog (for further information on the record go to http://aglog.kbs.msu.edu/observations/#id)