Africa SoilGrids - Exchangeable sodium (Na+)

Exchangeable sodium (Na+ measured in 1M NH4OAc buffered at pH 7 with part of the data converted from data measured according to Mehlich 3) in cmolc/kg (fine earth) at 2 depth intervals (0-20 cm and 20-50 cm) predicted using two Africa soil profiles datasets. For details see published paper here below (Hengl T., G.B.M. Heuvelink, B. Kempen, J.G.B. Leenaars, M.G. Walsh, K.D. Shepherd, A. Sila, R.A. MacMillan, J. Mendes de Jesus, L.T. Desta, J.E. Tondoh, 2015. Mapping Soil Properties of Africa at 250 m Resolution: Random Forests Significantly Improve Current Predictions. PLoS ONE 10(6)

Data and Resources

Additional Info

Field	Value
Last Updated	October 25, 2023, 14:07 (UTC)
Created	October 25, 2023, 14:07 (UTC)
access_constraints	["Attribution-NonCommercial 3.0 International (CC BY-NC 3.0), https://creativecommons.org/licenses/by-nc/3.0/"]
bbox-east-long	51.0
bbox-north-lat	37.0
bbox-south-lat	-35.0
bbox-west-long	-18.0
contact-email	johan.leenaars@wur.nl
coupled-resource	[]
dataset-reference-date	[{"type": "publication", "value": "2015-02-10"}]
frequency-of-update
graphic-preview-file	https://files.isric.org/public/thumbnails/afsis250m/enax.png
guid	df2c4602-03c4-4130-b7e5-2439e68bf415
harvest_object_id	2a023dcb-1cca-45b7-b9ca-5e9fc2677a01
harvest_source_id	0ac93d1f-9648-4157-af46-766b49f28e1c
harvest_source_title	ISRIC Soil Data
licence	[]
lineage	Project webpages: http://africasoils.net/ http://isric.org/projects/africa-soil-information-service-afsis Soil data (1): http://isric.org/projects/africa-soil-profiles-database-afsp Not included: Soil data (2): http://africasoils.net/services/data/soil-databases/
metadata-date	2021-07-14T11:51:58
metadata-language	eng
progress	Completed
resource-type	dataset
responsible-party	[{"name": "ISRIC - World Soil Information", "roles": ["Author"]}]
spatial	{"type": "Polygon", "coordinates": [[[-18.0, -35.0], [51.0, -35.0], [51.0, 37.0], [-18.0, 37.0], [-18.0, -35.0]]]}
spatial-data-service-type
spatial-reference-system	+proj=laea +lat_0=5 +lon_0=20 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs
spatial_harvester	true
temporal-extent-begin	1960-01-01
temporal-extent-end	2015-12-31