RELEASE-2021

This data product contains the quality-controlled, native sampling resolution data from NEON's belowground biomass protocol. These data enable estimation of the amount of belowground plant biomass <= 10 mm diameter within the area surrounding the NEON eddy covariance tower. At many sites this will also be the dominant vegetation type(s). Samples are collected once every five years. Whenever possible, NEON uses a 3-inch outside diameter (6.65 cm inside diameter) soil corer for belowground biomass sampling, with samples cored to 30 cm depth in order to be consistent with the sampling depth used for soil biogeochemistry and microbe sampling. All roots are sorted into three size category bins: <1 mm, 1-2 mm, and 2-10 mm. After sorting, root material is dried, weighed, and analyzed, then any excess root material is archived in the NEON Biorepository and available upon request. For additional details, see the user guide, protocols, and science design listed in the Documentation section below. Products resulting from this sampling include root biomass by size class as well as root chemistry and stable isotope ratios. A summary table of analytical lab precision and accuracy is included in the expanded package. Latency: The expected time from data and/or sample collection in the field to data publication is as follows, for each of the data tables (in days) in the downloaded data package. See the Data Product User Guide for more information. bbc_chemistryPooling: 90 bbc_dilution: 90 bbc_percore: 28 bbc_rootmass: 90 bbc_rootChemistry: 270 bgc\_CNiso\_externalSummary: 30