refs.bib

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@article{akpa2016total,
  title={Total soil organic carbon and carbon sequestration potential in Nigeria},
  author={Akpa, Stephen IC and Odeh, Inakwu OA and Bishop, Thomas FA and Hartemink, Alfred E and Amapu, Ishaku Y},
  journal={Geoderma},
  volume={271},
  pages={202--215},
  year={2016},
  doi={10.1016/j.geoderma.2016.02.021},
  publisher={Elsevier}
}

@book{TanSIS_2021,
author = {Meliyo, Joel and Weullow, Elvis and Dickens, Ateku and Karari, Valentine and Walsh G. Markus and McGrath, Steve P. and Acquah, Gifty E. and Haefele, Stephan M. and Gregory, Wendy and Durenkamp, Mark and Skilton, Ruth and Brookman, Melanie and Garwood, Chloe and Dobermann, Achim and Sila, Andrew and Shepherd, Keith},
publisher = {World Agroforestry - Research Data Repository},
title = "{Soil Spectra and Wet Chemistry Measurements from ICRAF Soil-Plant Spectral Diagnostics Laboratory and Rothamsted Research: Africa Soil Information Service (AfSIS) Phase 2 Project Data 2014-2018 - TanSIS}",
UNF = {UNF:6:om2PB2O/sXo6AfQqvUe6EQ==},
year = {2021},
version = {V1},
doi = {10.34725/DVN/XUDGJY},
url = {https://doi.org/10.34725/DVN/XUDGJY}
}

@Article{essd-13-1593-2021,
AUTHOR = {Gupta, S. and Hengl, T. and Lehmann, P. and Bonetti, S. and Or, D.},
TITLE = {SoilKsatDB: global database of soil saturated hydraulic conductivity measurements for geoscience applications},
JOURNAL = {Earth System Science Data},
VOLUME = {13},
YEAR = {2021},
NUMBER = {4},
PAGES = {1593--1612},
URL = {https://essd.copernicus.org/articles/13/1593/2021/},
DOI = {10.5194/essd-13-1593-2021}
}

@article{ramcharan2017soil,
  title={A soil bulk density pedotransfer function based on machine learning: A case study with the NCSS soil characterization database},
  author={Ramcharan, Amanda and Hengl, Tomislav and Beaudette, Dylan and Wills, Skye},
  journal={Soil Science Society of America Journal},
  volume={81},
  number={6},
  pages={1279--1287},
  doi={10.2136/sssaj2016.12.0421},
  year={2017},
  publisher={Wiley Online Library}
}

@book{hengl2019predictive,
  title={{Predictive soil mapping with R}},
  author={Hengl, Tomislav and MacMillan, Robert A},
  year={2019},
  url={https://soilmapper.org},
  publisher={Lulu. com},
  pages={370},
  isbn={978-0-359-30635-0}
}