LF_BRA
LF_BRA
Farm-scale soil spectral library from two local farms from Brazil (LF_BRA)
<300 samples
version 3
CC-BY
Database access
Data originally provided by:
- Contact: Tiago Rodrigues Tavares
- Email: tiagosrt@usp.br
- Original source: https://data.mendeley.com/datasets/88c5kvmgbf/1
Available files
| Type | Filename | Link |
|---|---|---|
| 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: none
- Sampling depth: top
- Geography: none
- Variables available (OSSL): 5 out of 5 — see Database description for full schema
- Populated columns:
id.layer_uuid_txt,id.layer_local_c,loc.field_src_txt,layer.upper.depth_usda_cm,layer.lower.depth_usda_cm
Soil laboratory information
- Total samples: 102
- Properties available (original): 9
- Properties standardized (OSSL): 8 — summarized in Table 1 below
- Categories: physical, chemical, carbon & nutrients, metal elements
- 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 |
|---|---|---|---|---|---|---|---|---|
clay.tot_usda.a334_w.pctClayMethod: usda.a334Unit: w.pct |
0 | 34.54 | 9.42 | 17.50 | 25.02 | 37.90 | 41.05 | 51.10 |
oc_iso.10694_w.pctOrganic Carbon, ISO 10694Method: iso.10694Unit: w.pct |
0 | 2.54 | 0.60 | 1.40 | 2.00 | 2.50 | 3.10 | 3.70 |
cec_usda.a723_cmolc.kgCEC, pH 7.0, NH4OAc, 2M KCl displacementMethod: usda.a723Unit: cmolc.kg |
0 | 8.00 | 2.59 | 3.75 | 5.85 | 7.99 | 9.78 | 14.89 |
ph.cacl2_iso.10390_indexpH, 1:5 Soil-CaCl2 Suspension, ISO 10390Method: iso.10390Unit: index |
0 | 5.33 | 0.44 | 4.60 | 5.00 | 5.20 | 5.60 | 6.30 |
p.ext_brazil.ier_mg.kgPhosphorus, Extractable, Ion Exchange Resin (IER)Method: brazil.ierUnit: mg.kg |
0 | 21.46 | 14.46 | 4.00 | 12.00 | 17.50 | 26.00 | 104.00 |
k.ext_brazil.ier_cmolc.kgPotassium, Extractable, Ion Exchange Resin (IER)Method: brazil.ierUnit: cmolc.kg |
0 | 0.34 | 0.24 | 0.09 | 0.10 | 0.28 | 0.55 | 1.03 |
ca.ext_brazil.ier_cmolc.kgCalcium, Extractable, Ion Exchange Resin (IER)Method: brazil.ierUnit: cmolc.kg |
0 | 3.49 | 1.92 | 0.80 | 1.52 | 3.30 | 5.00 | 7.80 |
mg.ext_brazil.ier_cmolc.kgMagnesium, Extractable, Ion Exchange Resin (IER)Method: brazil.ierUnit: cmolc.kg |
0 | 1.79 | 1.26 | 0.30 | 0.60 | 1.50 | 2.80 | 5.40 |
VNIR
- Acquisition mode: Not available
- Intensity: reflectance
- Original range: 431-2153
- Instrument: Veris MSP3 (USB4000 & C9914GB detectors)
- Manufacturer: Veris Technologies (Salina, KS, USA)
- Instrument co-scans: Not available
- Scan repeats: 3
- Scan accessory: Not available
- Original resolution: 5
- Sample preparation: Air-dried, Sieved < 2 mm
- Additional info: Not available
VNIR plot
