uid=KBS,o=lter,dc=ecoinformatics,dc=orgalluid=sbohm,o=lter,dc=ecoinformatics,dc=orgallpublicreadhttps://lter.kbs.msu.edu/datasets/218.emlSwitchgrass Variety Experiment II at the Kellogg Biological Station, Hickory Corners, MI (2022 to 2025)KurtThelenMichigan State UniversityUS(517) 355-0271 x1232thelenk3@msu.edu0000-0003-3464-0826G.RobertsonMichigan State University3700 East Gull Lake DriveHickory CornersMI49060US(269) 760-8364(269)671-2351robert30@msu.edu0000-0001-9771-9895StaceyVanderWulpMichigan State University3700 East Gull Lake DriveHickory CornersMI49060US(269) 671-2339(269) 671-2333vanderws@msu.eduToddMartinMichigan State UniversityEast LansingMichiganUSmartint6@msu.eduprincipal contact2026-06-07Dataset Abstractoriginal data source http://lter.kbs.msu.edu/datasets/218LTERKBSKellogg Biological StationHickory CornersMichiganGreat LakesPrimary ProductionPopulationsDisturbanceLTER 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Areafarmingbiotahttps://apps.usgs.gov/thesaurus/thesaurus-full.php?thcode=15Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director.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-85.404699-85.36685742.42026542.3910192022-11-022025-10-27Kellogg Biological StationData Managerlter.data.manager@kbs.msu.eduhttp://lter.kbs.msu.edu02vkce854KBS LTERStand counts can be used to evaluate seedling emergence, density, and distribution. We use the Vogel-Masters stand count method (Vogel and Masters, 2001) in herbaceous perennial treatments to measure frequency of occurrence or stand percentages of a single target species (i.e., switchgrass, miscanthus) or of a given growth form (i.e., native grasses). Dividing the frequency of occurrence by the total area examined provides a conservative estimate of plant density (plants/m2).
This protocol should be completed annually during the establishment phase.Stand Counts – PerennialsData Managerhttp://lter.kbs.msu.edu/protocols/175Surface (0-25 cm) soil samples are typically collected in the fall, composited by plot, and sent to an analytical laboratory for analysis and for nutrient and liming recommendations for field crops. Analyses include pH, lime index, phosphorus, potassium, calcium, magnesium, and cation exchange capacity. Samples collected in the fall provide liming and fertilizer recommendations for the following year.
Deep cores (0-100 cm) are collected every 5-10 years and samples are analyzed separately by depth interval to monitor longer-term changes in composition with depth.
Sampling frequency: Depends on experiment and research objective.
Agronomic Soil Chemistry – Analytical Lab AnalysisData Managerhttp://lter.kbs.msu.edu/protocols/178https://lter.kbs.msu.edu/datatables/716Kellogg Biological Station LTER: Dry Matter Yield (GLBRC142-001)Dry matter yields from machine harvests of the Switchgrass Variety Experiment II.Dry+Mater+Yield.csvNone331\ncolumn,no"\https://data.sustainability.glbrc.org/datatables/716.csvexperimentthe name of the experimentthe name of the experimentharvest_yearthe year the harvest is allocated toYYYY11987-4-18harvest_datethe date the crop was harvestedYYYY-MM-DD11987-4-18planting_yearthe year the crop was plantedYYYY11987-4-18switchgrass_varietythe switchgrass variety plantedthe switchgrass variety plantedvariety_ecotypethe ecotype of the switchgrass variety plantedthe ecotype of the switchgrass variety plantedreplicatefield replicatefield replicateplot_codethe plotthe plotsplitthe cardinal direction of the split-plot the cardinal direction of the split-plot nitrogen_addedthe nitrogen treatment. no nitrogen added = 0N, nitrogen added according to the protocol = +Nthe nitrogen treatment. no nitrogen added = 0N, nitrogen added according to the protocol = +Narea_harvested_ft2the area that was harvestedsquareFootrealmoisture_at_harvest_percentthe moisture percentage at harvest in %gramsPerHectogramrealdry_matter_yield_kg_hadry matter yieldkilogramsPerHectarerealcommentscomments about the observationcomments about the observationhttps://lter.kbs.msu.edu/datatables/742Kellogg Biological Station LTER: Switchgrass Stand Counts (GLBRC142-002)Stand counts of switchgrass varieties are occasionally conducted to monitor population growth and recruitment. Null values in the count indicate that no count was taken.Switchgras+Stand+Counts.csvNone291\ncolumn,no"\https://data.sustainability.glbrc.org/datatables/742.csvsample_dateThe sample dateYYYY-MM-DD11987-4-18siteThe MLE siteThe MLE siteexperimentThe experiment nameThe experiment nametreatmentthe treatment sampledthe treatment sampledreplicatethe field replicatethe field replicatestationthe sample stationthe sample stationsubplotThe subplot that was sampledThe subplot that was sampledswitchgrass_varietythe switchgrass variety sampledthe switchgrass variety sampledswitchgrass_ecotypethe ecotype of the switchgrass grown in the plotthe ecotype of the switchgrass grown in the plotaverage_stand_countcounts per meter squarednumberPerMeterSquaredrealhttps://lter.kbs.msu.edu/datatables/766Kellogg Biological Station LTER: Agronomic Soil Chemistry (GLBRC142-003)Agronomic soil test results of the GLBRC Switchgrass Variety Experiment II. Surface soils (0-25 cm) are periodically sampled, air dried, and sent to an analytical laboratory for testing and fertilizer and liming recommendations.Agronomic+Soil+Chemistry.csvNone411\ncolumn,no"\https://data.sustainability.glbrc.org/datatables/766.csvsample_dateThe sample date.YYYY-MM-DD11987-4-18siteThe name of the siteThe name of the siteexperimentThe name of the experimentThe name of the experimenttreatmentnumerical treatment of the Switchgrass Variety Experiment IIintegervarietyswitchgrass variety treatmentswitchgrass variety treatmentecotypeswitchgrass variety ecotypeswitchgrass variety ecotypereplicateThe replicate sampledThe replicate sampledsubplotThe sub plot sampledThe sub plot sampledcampaignsoil sampling campaignsoil sampling campaigndepthsoil sampling depthsoil sampling depthp_ppmBray-P1 concentrationmilligramsPerKilogramrealk_ppmpotassium concentrationmilligramsPerKilogramrealca_ppmcalcium concentrationmilligramsPerKilogramrealmg_ppmmagnesium concentrationmilligramsPerKilogramrealest_cecCation exchange capacity in meq/100g soilmilliEquivalentsPerHundredGramrealmg_percentmagnesium percentagegramsPerHectogramrealca_percentcalcium percentagegramsPerHectogramrealh_percenthydrogen percentagegramsPerHectogramrealk_percentpotassium percentagegramsPerHectogramrealanalysis_labThe soil test lab nameThe soil test lab name