WoSIS - July 2016 snapshot

 
Location of soil profiles in WoSIS (July 2016, some 96,000 profiles)

WoSIS - July 2016 snapshot

 

DOI landing page

 

WoSIS - July 2016 snapshot

This dataset (snapshot) should be cited as:
Batjes NH., Ribeiro E, van Oostrum A, Leenaars J, and Mendes de Jesus J (2016). Standardised soil profile data for the world (WoSIS, July 2016 snapshot), doi:10.17027/isric-wdcsoils.20160003.   Supplement to: Batjes NH, Ribeiro E, van Oostrum A, Leenaars J, Hengl T, and Mendes de Jesus J (2017). WoSIS: Providing standardised soil profile data for the world, Earth System Science Data 9, 1-14, doi:10.5194/essd-9-1-2017 (PDF).

>>>> Download: WoSIS_July_2016 snapshot (TXT format, zipped 68 Mb; includes 'Readme First' file) <<<<

General file naming conventions and descriptions are listed in the table below. Specifics for WoSIS snapshots may be found in the above ESSD paper (App. B) and 'Readme First' file that comes in the zipped snapshot.

Property# Description
bulk_density_fine_earth  Bulk density of the fine earth fraction < 2 mm (kg/dm3)
bulk_density_whole_soil  Bulk density of the whole soil including coarse fragments (kg/dm3)
calcium_carbonate_equivalent_total  The content of carbonate in a liming material or calcareous soil calculated as if all of the carbonate is in the form of CaCO3 (g/kg in the fine earth fraction < 2 mm); also known as inorganic carbon
organic_carbon Gravimetric content of organic carbon in the fine earth fraction <2 mm (g/kg)
total_carbon  Gravimetric content of organic carbon and inorganic carbon in the fine earth fraction < 2 mm (g/kg)

cation_exchange_capacity_pH7

Capacity of the fine earth fraction < 2 mm to hold exchangeable cations, estimated by buffering the soil at pH7 (CEC, cmolc/kg)

cation_exchange_capacity_pH8

Capacity of the fine earth fraction < 2 mm to hold exchangeable cations, estimated by buffering the soil at pH8.2 (CEC, cmolc/kg)

effective_cation_exchange_capacity

Capacity of the fine earth fraction < 2 mm to hold exchangeable cations at the pH of the soil (ECEC, cmolc/kg). Conventionally approximated by summation of exchangeable bases (Ca2+, Mg2+, K+, and Na+) plus 1 N KCl exchangeable acidity (Al3+ and H+) in acidic soils 

electrical_conductivity 

Ability of a 1:x soil water extract to conduct electrical current (ECx, mS/m);  ECe  refers to values measured in a saturated soil extract
coarse_fragments_gravimetric_total  Gravimetric content of coarse fragments > 2 mm in the whole soil (g/100g)
coarse_fragments_volumetric_total  Volumetric content of the coarse fragments > 2 mm in the whole soil (cm3/100cm3)
clay_total  Gravimetric content of < 0.002 mm soil material in the fine earth fraction < 2 mm (g/100g) 
silt_total  0.002 mm to Y mm fraction of the <  2 mm soil material (g/100g); esd (equivalent spherical diameter), X resp. Y as specified in the analytical method descriptions
sand_total Larger than Y mm fraction of the < 2 mm soil material (g/100g); esd (equivalent spherical diameter), Y as specified in the analytical method descriptions
water_retention_gravimetric  Soil moisture content by weight, at the tension specified in the analytical method descriptions (g/100g)
water_retention_volumetric  Soil moisture content by volume, at the tension specified in the analytical method descriptions (cm3/100cm3)
ph_cacl2  A measure of the acidity or alkalinity in soils, defined as the negative logarithm (base 10) of the activity of hydronium ions (H+) in a CaCl2 solution, as specified in the analytical method descriptions
ph_h2o  A measure of the acidity or alkalinity in soils, defined as the negative logarithm (base 10) of the activity of hydronium ions (H+) in water
ph_kcl*  A measure of the acidity or alkalinity in soils, defined as the negative logarithm (base 10) of the activity of hydronium ions (H+) in a KCl solution, as specified in the analytical method descriptions
ph_naf  A measure of the acidity or alkalinity in soils, defined as the negative logarithm (base 10) of the activity of hydronium ions (H+) in a NaF solution, as specified in the analytical method descriptions
soil_classification_WRB Classification of the soil profile according to specified edition (year) of the World Reference Base for Soil Resources (WRB), up to qualifier level when available
soil_classification_FAO Classification of the soil profile according to specified edition (year) of the FAO-Unesco Legend, up to soil unit level when available
soil_classification_Soil_Taxonomy Classification of the soil profile according to specified edition (year) of USDA Soil Taxonomy, up to subgroup level when available

 

 

Feedback and questions

We are constantly adding new dat sets to WoSIS and improving the associated web services; your feedback would be highly appreciated!

If you are interested in sharing soil profile data for consideration in WoSIS please contact us with some details of the dataset (metadata).

Feel free to  contact us if questions arise in the use of our analysis products; please indicate in your e-mail which product/release you are using.

 

Technical documentation

Ribeiro E, Batjes NH, Leenaars JGB, Van Oostrum AJM and Mendes de Jesus J 2015.Towards the standardization and harmonization of world soil data: Procedures Manual ISRIC World Soil Information Service (WoSIS version 2.0). ISRIC - World Soil Information, Wageningen, 110 p. (available at:  http://www.isric.org/sites/default/files/isric_report_2015_03.pdf)

 

Acknowledgements

The development of WoSIS (World Soil Information Service) has been made possible thanks to the contributions and shared knowledge of a steadily growing number of data providers, including soil survey organisations, research institutes and individual experts, see here for details.