RELEASE-2022

This data product contains the quality-controlled, native sampling resolution data from NEON's periodic soil sampling, as well as measurements of pH, moisture, chemistry, and stable isotopes. Samples collected as part of this product are also used for microbial measurements; those data can be found in associated data products. Soil is defined as the upper layer of the earth's surface where plants grow and consists of decomposing organic material and inorganic particles such as clay and rock. Soils are sampled by horizon type (organic or mineral) to a maximum depth of 30cm. Following field collection, all soils are measured for moisture and pH, and a subset are also measured for microbial abundance and composition, inorganic nitrogen (N) pools and total soil organic carbon (C) and nitrogen (N) by external laboratories. Frozen soil for the microbial archive is also collected for many samples, and during peak greenness chemistry bouts, excess air-dried soil is archived as well in the NEON Biorepository and available upon request. For additional details, see the user guides, protocols, and science designs listed in the Documentation section below. Queries for this data product will return field collection metadata as well as physical and chemical measurements for the specified sites within the specified date range. Summary tables of external lab precision and accuracy for chemistry and stable isotope analyses are included in the expanded package. This data product also provides field and laboratory metadata that can be associated with soil microbial data products; refer to the documentation for the respective soil microbe data products for more details. 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 Guides for more information. sls_bgcSubsampling: 90 sls_metagenomicsPooling: 90 sls_soilCoreCollection: 90 sls_soilMoisture: 90 sls_soilpH: 90 sls_soilChemistry: 270 bgc\_CNiso\_externalSummary: 30 ntr_internalLab: 90 ntr_internalLabBlanks: 90 ntr_externalLab: 180 ntr_externalSummary: 30