geodata (version 0.6-2)

soil_af_elements: Soil elements data for Africa

Description

Connect to or download chemical soil element concentration (for the 0-30 cm topsoil) data for Africa. The spatial resolution is 30 arc-seconds (about 1 km2), aggregated from the original 250 m spatial resolution.

The data have an Open Data Commons Open Database License (ODbL)

For more information, see https://www.isric.org/projects/soil-property-maps-africa-250-m-resolution

Usage

soil_af_elements(var, path, ...)

Value

SpatRaster

Arguments

var

character. Variables name. One of: "Al", "B", "Ca", "Cu", "Fe", "K", "Mg", "Mn", "N", "Na", "P", "Ptot", "Zn". See Details

path

character. Path for storing the downloaded data. See geodata_path

...

additional arguments passed to download.file

Details

	var	description	unit
	Al	Extractable aluminum	mg kg-1 (ppm)
	B	Extractable boron	mg kg-1 (ppm)
	Ca	Extractable calcium	mg kg-1 (ppm)
	Cu	Extractable copper	mg kg-1 (ppm)
	Fe	Extractable iron	mg kg-1 (ppm)
	K	Extractable potassium	mg kg-1 (ppm)
	Mg	Extractable magnesium	mg kg-1 (ppm)
	Mn	Extractable manganese	mg kg-1 (ppm)
	N	Organic nitrogen	mg kg-1 (ppm)
	Na	Extractable sodium	mg kg-1 (ppm)
	P	Extractable phosphorus	mg (100 kg-1)
	Ptot	Total phosphorus	mg (100 kg-1)
	Zn	Extractable zinc	mg kg-1 (ppm)

References

Hengl T, Heuvelink GBM, Kempen B, Leenaars JGB, Walsh MG, Shepherd KD, et al. (2015) Mapping Soil Properties of Africa at 250 m Resolution: Random Forests Significantly Improve Current Predictions. PLoS ONE 10(6): e0125814. doi:10.1371/journal.pone.0125814

See Also

soil_af, soil_af_isda, soil_world

Examples

# \donttest{
# downloads a large file
fe <- soil_af_elements("Fe", path=tempdir(), quiet=TRUE)
# }