NEON

NEON

National Ecological Observatory Network (NEON) soil spectral library

VNIR NIR MIR
National — United States
<300 samples first release (v1) CC-BY

Database access

Data originally provided by:

Available files

Type Filename Link
MIR spectra — CSV (gzip) ossl_mir_v1.3.csv.gz Download
MIR spectra — Parquet ossl_mir_v1.3.parquet Download
Soil lab measurements — CSV (gzip) ossl_soillab_v1.3.csv.gz Download
Soil lab measurements — Parquet ossl_soillab_v1.3.parquet Download
Soil site metadata — CSV (gzip) ossl_soilsite_v1.3.csv.gz Download
Soil site metadata — Parquet ossl_soilsite_v1.3.parquet Download

Map

Soil site information

  • Coordinates precision: precise
  • Sampling depth: various
  • Geography: soil taxonomy, soil horizon
  • Variables available (OSSL): 11 out of 11 — see Database description for full schema
  • Populated columns: id.layer_uuid_txt, id.layer_local_c, id.biogeo_src_txt, site.domain_src_txt, site.id_src_txt, site.pit_src_txt, observation.date_src_yyyy.mm.dd, site.pit.name_src_txt, pedon.horizon_src_txt, layer.upper.depth_usda_cm, layer.lower.depth_usda_cm

Soil laboratory information

Hover over any OSSL code in the table below to see its full description.

Table 1: Summary statistics (mean, SD, percentiles) for OSSL-standardized soil properties.
skim_variable n_missing mean sd p0 p25 p50 p75 p100
c.tot_usda.a622_w.pctCarbon, Total NCSMethod: usda.a622Unit: w.pct 0 3.92 8.87 0.02 0.25 1.09 2.96 55.51
n.tot_usda.a623_w.pctNitrogen, Total NCS, usda.a623Method: usda.a623Unit: w.pct 25 0.20 0.32 0.01 0.04 0.07 0.20 1.82
s.tot_usda.a624_w.pctSulfur, Total NCSMethod: usda.a624Unit: w.pct 138 0.05 0.15 0.01 0.01 0.02 0.04 2.01
oc_usda.c729_w.pctOrganic Carbon, Total C without CaCO3, S prepMethod: usda.c729Unit: w.pct 0 3.49 8.93 0.00 0.10 0.50 2.00 55.50
ph.h2o_usda.a268_indexpH, 1:1 Soil-Water SuspensionMethod: usda.a268Unit: index 1 5.72 1.50 3.10 4.60 5.10 7.40 8.70
ph.cacl2_usda.a481_indexpH, 1:2 Soil-CaCl2 SuspensionMethod: usda.a481Unit: index 1 6.40 1.40 3.80 5.30 5.80 7.90 9.20
ec_usda.a364_ds.mElectrical Conductivity, (w/w)Method: usda.a364Unit: ds.m 2 0.40 1.06 0.01 0.03 0.09 0.24 7.70
caco3_usda.a54_w.pctCarbonate, <2mm FractionMethod: usda.a54Unit: w.pct 0 3.62 9.95 0.00 0.00 0.00 0.00 68.00
ca.ext_usda.a722_cmolc.kgCalcium, Extractable, NH4OAcMethod: usda.a722Unit: cmolc.kg 0 16.48 21.40 0.00 0.70 4.70 26.30 142.00
k.ext_usda.a725_cmolc.kgPotassium, Extractable, NH4OAc, 2M KCl displacementMethod: usda.a725Unit: cmolc.kg 0 0.46 0.67 0.00 0.10 0.20 0.50 4.30
mg.ext_usda.a724_cmolc.kgMagnesium, Extractable, NH4OAc, 2M KCl displacementMethod: usda.a724Unit: cmolc.kg 0 3.63 6.12 0.00 0.20 1.50 5.10 70.70
na.ext_usda.a726_cmolc.kgSodium, Extractable, NH4OAc, 2M KCl displacementMethod: usda.a726Unit: cmolc.kg 0 0.83 3.66 0.00 0.00 0.00 0.00 36.40
cec_usda.a723_cmolc.kgCEC, pH 7.0, NH4OAc, 2M KCl displacementMethod: usda.a723Unit: cmolc.kg 0 16.26 16.19 0.00 5.60 10.60 21.10 100.30
al.ext_usda.a69_cmolc.kgAluminum, Extractable, KClMethod: usda.a69Unit: cmolc.kg 161 2.12 2.50 0.00 0.30 1.00 2.92 11.80
cf_usda.c232_w.pct 0 5.33 6.78 0.00 0.00 2.50 8.60 36.80
cf_usda.c235_w.pct 0 6.18 10.54 0.00 0.00 1.00 8.60 72.80
sand.tot_usda.c60_w.pctSand, Total, S prepMethod: usda.c60Unit: w.pct 11 50.93 27.81 1.60 27.52 53.20 74.55 97.60
silt.tot_usda.c62_w.pctSilt, Total, S prepMethod: usda.c62Unit: w.pct 11 31.15 17.57 1.30 17.02 29.90 44.03 78.80
clay.tot_usda.a334_w.pctClayMethod: usda.a334Unit: w.pct 11 17.92 14.35 0.00 5.90 14.55 27.40 60.30
bd_usda.a4_g.cm3Bulk Density, <2mm fraction, ClodMethod: usda.a4Unit: g.cm3 6 1.23 0.42 0.03 1.04 1.30 1.52 2.27

MIR

  • Acquisition mode: Not available
  • Intensity: absorbance
  • Original range: 400-4000
  • Standardized range: 628-4000
  • Instrument: Vertex 70 FT-IR & Vertex 70 FT-IR
  • Manufacturer: Bruker Optics
  • Scan accessory: Not available
  • Sample preparation: Air-dried, finely ground < 80mesh
  • Additional info: MCT (mercury cadmium telluride) detector & KBr beamsplitter; Gold mirror; Mirror background

MIR plot

References

  1. Publication 1