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Issue Date: April 14th 2019
Last modified: May 17th 2019
Dataset

Africa Soil Information Service (AfSIS) Soil Chemistry

This dataset contains soil infrared spectral data and paired soil property reference measurements for georeferenced soil samples that were collected through the Africa Soil Information Service (AfSIS) project, which lasted from 2009 through 2018.

Link: https://github.com/qedsoftware/afsis-soil-chem-tutorial

Tags: geospatial, GIS, infrared, spectral

This dataset contains soil infrared spectral data and paired soil property reference measurements for georeferenced soil samples that were collected through the Africa Soil Information Service (AfSIS) project, which lasted from 2009 through 2018. In this release, we include data collected during Phase I (2009-2013.) Georeferenced samples were collected from 19 countries in Sub-Saharan African using a statistically sound sampling scheme, and their soil properties were analyzed using both conventional soil testing methods and spectral methods (infrared diffuse reflectance spectroscopy).

The two types of data can be paired to form a training dataset for machine learning, such that certain soil properties can be well-predicted through less expensive spectral techniques.

Standards for Inclusion

To maximize the utility of this dataset for spectral inference and geospatial mapping, we are only including data satisfying the following constraints:

  • The soil sample corresponding to this measurement can be associated with a georeference inside Africa.
  • A dry chemistry measurement is included only if there exists some wet chemistry measurement of the same soil sample.
  • A wet chemistry measurement is included only if there exists some dry chemistry measurement of the same soil sample.

The chemical analyses of soils were performed by three different labs, all ISO/IEC 17025:2005 certified:

  • the World Agroforestry Centre (ICRAF),
  • Crop Nutrition Laboratory Services Ltd. (CROPNUTS),
  • and Rothamsted Research (RRES).

Careful documentation for all procedures used by the labs have also been included in this dataset.

Data Coverage
Data Coverage
Cost Implication: Free
Project Details
Project Details
Link: https://github.com/qedsoftware/afsis-soil-chem-tutorial
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