uid=KBS,o=lter,dc=ecoinformatics,dc=orgalluid=sbohm,o=lter,dc=ecoinformatics,dc=orgallpublicreadhttps://lter.kbs.msu.edu/datasets/236.emlSwitchgrass Nitrogen Fixation Experiment at the Kellogg Biological Station, Hickory Corners, MI (2018 to 2022)NicholasHaddadMichigan State University3700 E Gull Lake DriveHickory Corners49060UShaddad@kbs.msu.edu0000-0002-1591-9322JosephSimmonsMichigan State University3700 East Gull Lake DriveHickory CornersMI49060(269) 671-2528(269)671-2104simmonsj@kbs.msu.eduprincipal contactCarolinaCordovaMichigan State UniversityUScordov13@msu.edu0000-0002-4716-127Xprincipal contact2026-07-19Dataset Abstractoriginal data source http://lter.kbs.msu.edu/datasets/236LTERKBSKellogg Biological StationHickory CornersMichiganGreat LakessoiltestPrimary ProductionInorganic NutrientsDisturbancePopulationsLTER Core Research Areaswitchgrassfarmingbiotahttps://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in the KBS LTER core database may not be published without written permission of the lead investigator or project director.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-85.404699-85.36685742.42026542.3910192018-10-152022-12-02Kellogg 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/175https://lter.kbs.msu.edu/datatables/701Kellogg Biological Station LTER: Switchgrass Yields (KBS127-006)Dry matter switchgrass yields from machine harvests of the Switchgrass Nitrogen Fixation Experiment (plots 1-16). Plots were converted from the corn-soybean-wheat rotation of the LTER Main Cropping System Experiment (MCSE) to switchgrass in 2016, with the first harvest in 2018. See the Interactions Experiment for agronomic grain yields before conversion.
This experiment was retired in 2022 and herbicided in 2023. There is no harvest from these plots in 2023Switchgras+Yields.csvNone251\ncolumn,no"\https://lter.kbs.msu.edu/datatables/701.csvsample_dateharvest dateYYYY-MM-DD11987-4-18plotplot nameplot namelegacy_tillage_treatmentlegacy tillage treatment in Interaction Experimentlegacy tillage treatment in Interaction Experimentspeciesspecies planted and harvestedspecies planted and harvestedyield_metric_tons_hadry matter yield in metric tons/hatonnePerHectarerealhttps://lter.kbs.msu.edu/datatables/570Kellogg Biological Station LTER: Agronomic Soil Chemistry (KBS128-001)Agronomic chemistry of surface (0-25 cm) soils of the Switchgrass Nitrogen Fixation Experiment (plots 1-16) planted to switchgrass in 2016. Soils are occasionally collected in the fall (usually after harvest) for fertilizer and liming recommendations and analyzed for pH, lime index, phosphorus, potassium, calcium, magnesium, and cation exchange capacity by an analytical service laboratory.Agronomic+Soil+Chemistry.csvNone341\ncolumn,no"\https://lter.kbs.msu.edu/datatables/570.csvsample_datesample dateYYYY-MM-DD11987-4-18legacy_tillage_treatmentCT = Conventional tillage, NT = No-till, F = fertilized, N = unfertilizedCT = Conventional tillage, NT = No-till, F = fertilized, N = unfertilizedreplicatereplicate blockreplicate blockplotwhole plots (1-16), and plot id+MO (2, 6, 9, 13) stands for plots that have monoliths installed within. whole plots (1-16), and plot id+MO (2, 6, 9, 13) stands for plots that have monoliths installed within. depthdepth of soil sampleddepth of soil sampledpHpHdimensionlessrealceccation exchange capacity (meq/100g)milliEquivalentsPerHundredGramrealphosphorusBray P1 phosphorus (ppm)microgramsPerKilogramtextpotassiumPotassium (ppm)microgramsPerKilogramrealcalciumCalcium (ppm)microgramsPerKilogramrealmagnesiumMagnesium (ppm)microgramsPerKilogramreallime_indexLime IndexLime IndexyearSample yearSample yearhttps://lter.kbs.msu.edu/datatables/669Kellogg Biological Station LTER: Soil Moisture under Rainout Shelters (KBS128-003)Soil moisture measured at two depths (10 and 25 cm) in surface soils under the rainfall exclusion shelters of the Switchgrass Nitrogen Fixation Experiment. Soils under shelters manually received rainfall on differing schedules.Soil+Moisture+under+Rainout+Shelters.csvNone301\ncolumn,no"\https://lter.kbs.msu.edu/datatables/669.csvsitethe experiment stationthe experiment stationexperimentthe name of the experimentthe name of the experimentsample_datetime_utcthe time of sampling in UTCYYYY-MM-DD hh:mm:ss11987-4-18plotthe plot sampledthe plot sampleddepththe sample depth cmcentimeterrealvwcfractional volumetric water content cubicMeterPerCubicMeterrealtemperaturesoil temperaturecelsiusrealsample_idsample idsample idhttps://lter.kbs.msu.edu/datatables/683Kellogg Biological Station LTER: Switchgrass Stand Counts (KBS128-004)Stand counts of switchgrass populations of the Switchgrass Nitrogen Fixation Experiment periodically conducted in the spring to assess growth and recruitment. Switchgras+Stand+Counts.csvNone281\ncolumn,no"\https://lter.kbs.msu.edu/datatables/683.csvyearsample yearsample yearstationthe station with the plot that was sampled, This indicates the location within the plotthe station with the plot that was sampled, This indicates the location within the plotaverage_stand_count_m2stand count estimated by the Vogel and Masters 2001grid methodnumberPerMeterSquaredreal