BESB
BESB
Brazilian Soil Spectral Library (BESB)
15,000+ samples
version v.002
CC-BY
Database access
Data originally provided by:
- Contact: José A.M. Demattê
- Email: jamdemat@usp.br
- Original source: https://zenodo.org/records/8361419
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 |
| VisNIR spectra — CSV (gzip) | ossl_visnir_v1.3.csv.gz |
Download |
| VisNIR spectra — Parquet | ossl_visnir_v1.3.parquet |
Download |
Map
Soil site information
- Coordinates precision: precise, state/province, region
- Sampling depth: top
- Geography: soil taxonomy, landuse, vegetation
- Variables available (OSSL): 15 out of 15 — see Database description for full schema
- Populated columns:
id.layer_uuid_txt,id.layer_local_c,dataset.contributor_src_code,layer.upper.depth_usda_cm,layer.lower.depth_usda_cm,observation.type_src_txt,latitude.point_wgs84_dd,longitude.point_wgs84_dd,loc.region_src_txt,loc.state_src_txt,loc.municipality_src_txt,site.biome_src_txt,site.vegetation_src_txt,site.geology_src_txt,layer.sequence_usda_uint16
Soil laboratory information
- Total samples: 16,084
- Properties available (original): 8
- Properties standardized (OSSL): 8 — summarized in Table 1 below
- Categories: physical, chemical, carbon & nutrients
- Original source: see Database access
Hover over any OSSL code in the table below to see its full description.
| skim_variable | n_missing | mean | sd | p0 | p25 | p50 | p75 | p100 |
|---|---|---|---|---|---|---|---|---|
sand.tot_usda.c405_w.pctSand, Total, N prepMethod: usda.c405Unit: w.pct |
959 | 54.17 | 28.26 | 0.47 | 26.70 | 61.40 | 80.00 | 95.40 |
clay.tot_usda.a334_w.pctClayMethod: usda.a334Unit: w.pct |
977 | 31.15 | 21.58 | 0.70 | 13.00 | 24.00 | 48.00 | 96.10 |
oc_iso.10694_w.pctOrganic Carbon, ISO 10694Method: iso.10694Unit: w.pct |
2737 | 1.31 | 0.89 | 0.08 | 0.70 | 1.06 | 1.68 | 7.49 |
ph.h2o_usda.a268_indexpH, 1:1 Soil-Water SuspensionMethod: usda.a268Unit: index |
12601 | 4.64 | 0.61 | 3.10 | 4.10 | 4.60 | 5.10 | 7.00 |
ca.ext_usda.a722_cmolc.kgCalcium, Extractable, NH4OAcMethod: usda.a722Unit: cmolc.kg |
3588 | 1.95 | 2.27 | 0.00 | 0.60 | 1.30 | 2.43 | 25.20 |
mg.ext_usda.a724_cmolc.kgMagnesium, Extractable, NH4OAc, 2M KCl displacementMethod: usda.a724Unit: cmolc.kg |
3585 | 0.84 | 1.05 | 0.01 | 0.28 | 0.60 | 1.04 | 18.62 |
na.ext_usda.a726_cmolc.kgSodium, Extractable, NH4OAc, 2M KCl displacementMethod: usda.a726Unit: cmolc.kg |
15423 | 0.73 | 2.17 | 0.00 | 0.01 | 0.04 | 0.32 | 18.90 |
cec_usda.a723_cmolc.kgCEC, pH 7.0, NH4OAc, 2M KCl displacementMethod: usda.a723Unit: cmolc.kg |
3588 | 5.33 | 3.34 | 0.22 | 3.06 | 4.44 | 6.86 | 18.99 |
MIR
- Acquisition mode: Not available
- Intensity: absorbance
- Original range: 600-4000
- Standardized range: 600-4000
- Instrument: Alpha Sample Compartment RTDLaTGS ZnSe
- Manufacturer: Bruker Optik GmbH, Ettlingen, Germany
- Scan accessory: Not available
- Sample preparation: Sieved<2mm, ground
- Additional info: The sensor has a HeNe laser; A gold reference plate was used as standard
MIR plot
VNIR
- Acquisition mode: Not available
- Intensity: reflectance
- Original range: 350-2500
- Instrument: FieldSpec 3 Spectroradiometer
- Manufacturer: Analytical Spectral Devices (ASD, Boulder, CO)
- Instrument co-scans: 100
- Scan repeats: 2
- Scan accessory: Not available
- Original resolution: 1
- Sample preparation: Air-dried, Sieved < 2 mm
- Additional info: The sensor is calibrated using a white Spectralon plate (Lab-sphere, North Sutton, NH, USA) representing a 100% reflectance standard
VNIR plot
