Load curated soil profiles from the Embrapa Redape GeoTab dataset

Reads the structured JSON files (one profile per file) published by Vaz et al. 2023 at the Embrapa Redape repository (DOI 10.48432/PYKKA7) and converts each one to a soilKey PedonRecord.

Usage

load_redape_pedons(json_dir, max_n = NULL, verbose = TRUE)

Arguments

json_dir: Directory containing the GeoTab JSON files (or a character vector of file paths).
max_n: If non-NULL, take a random sample of this size.
verbose: Print progress (default TRUE).

Value

A list of PedonRecord objects.

Details

The dataset is unique in two ways:

Every profile was hand-reviewed by experienced pedologists (the curation note and author list are preserved on each pedon site record), so it is suitable as a gold-standard benchmark.
Unlike BDsolos, all profiles ship the full exchange complex (Ca, Mg, K, Na, Al and H), so cec_cmol (Valor T = S + H + Al) is computed directly without any fallback option.

Reference

Vaz, G. J., Silva Jr, A. F., & Silva Neto, L. de F. da (2023). Brazilian soil data for taxonomic classification. Redape, V1. doi:10.48432/PYKKA7 .