uid=KBS,o=lter,dc=ecoinformatics,dc=orgalluid=sbohm,o=lter,dc=ecoinformatics,dc=orgallpublicreadhttps://lter.kbs.msu.edu/datasets/246.emlG.RobertsonMichigan State University

3700 East Gull Lake DriveHickory CornersMI49060US

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

3700 East Gull Lake DriveHickory CornersMI49060

(269) 671-2528(269)671-2104simmonsj@kbs.msu.eduprincipal contact2026-07-11

original data source http://lter.kbs.msu.edu/datasets/246

LTERKBSKellogg Biological StationHickory CornersMichiganGreat LakesPrimary ProductionInorganic 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Areafarmingbiotahttps://apps.usgs.gov/thesaurus/thesaurus-full.php?thcode=15Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director.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-85.404699-85.36685742.42026542.3910192024-10-172025-10-30Kellogg Biological StationData Managerlter.data.manager@kbs.msu.eduhttp://lter.kbs.msu.edu02vkce854KBS LTERThe biofuel cropping systems of GLBRC Experiments range from annual crops to perennial monoculture grasses and mixed communities to poplar trees. Different sampling methods are needed to measure aboveground net primary productivity (ANPP) in these diverse plant communities. In general, plant biomass is sampled for all major community components before harvest at peak annual biomass. This typically means physiological maturity for annuals and pre-senescence for perennials. For the Biofuel Cropping System Experiment (BCSE; Treatments G1-G10), plant biomass is sampled at each of the 3 sampling stations within a treatment plot (see https://lter.kbs.msu.edu/maps/images/glbrc-station-flags.pdf). ANPP sampling in the Scale-Up Experiment (Fields L1-L3 and M1-M4) terminated after the 2016 growing season, but was sampled from 2009 to 2016 at each of the 10 sampling stations within a field (see https://lter.kbs.msu.edu/maps/images/current-glbrc-scaleup-fields.pdf). The location of the sampling quadrat around the sampling station varies annually and quadrat placement is determined by quadrat size and ease for field sampling. ANPP is measured in g/m2/yr and is the sum of the major plant community components of each treatment at their peak biomass. Note that ANPP is different from agronomic yield, which represents only the harvested portion of ANPP. Also note the BCSE in Arlington (ARL) was retired at the end of the 2017 growing season. The protocols listed below focus on methods used at KBS; if ARL used different methods, those differences are given at the end of each section.Data Managerhttp://lter.kbs.msu.edu/protocols/156https://lter.kbs.msu.edu/datatables/804Kellogg Biological Station LTER: Dry matter yields for the GLBRC Sorghum Nitrogen Rate Experiment (GLBRC246-001)This datatable contains dry matter yield data of the GLBRC Sorghum Nitrogen Rate Experiment. more details at https://lter.kbs.msu.edu/maps/images/current-sorghum-nitrogen-rate-experiment.pdfDry+mater+yields+for+the+GLBRC+Sorghum+Nitrogen+Rate+Experiment.csvNone281\ncolumn,no"\https://data.sustainability.glbrc.org/datatables/804.csvexperimentThe experiment nameThe experiment namesitethe site namethe site nametreatmentthe treatment namethe treatment namereplicatethe field replicate plotthe field replicate plotcrop_yearthe crop year. Sometimes the harvest date slips into the following year. This is the year the crop was grown.the crop year. Sometimes the harvest date slips into the following year. This is the year the crop was grown.harvest_datethe date of the harvestYYYY-MM-DD11987-4-18crop_speciesthe species harvestedthe species harvestedfractionharvested crop fractionharvested crop fractiondry_matter_yieldThe dry matter yield in kg/hakilogramsPerHectarerealhttps://lter.kbs.msu.edu/datatables/834Kellogg Biological Station LTER: Agronomic soil chemistry data for the GLBRC Sorghum Nitrogen Rate Experiment (GLBRC246-002)Agronomic soil chemistry data for the GLBRC Sorghum Nitrogen Rate ExperimentAgronomic+soil+chemistry+data+for+the+GLBRC+Sorghum+Nitrogen+Rate+Experiment.csvNone371\ncolumn,no"\https://data.sustainability.glbrc.org/datatables/834.csvmg_ppmmagnesiummilligramsPerKilogramrealp_M3_ppmphosphorus concentration by Mehlich 3 (M3) phosphorus test milligramsPerKilogramreal