references.bib

@article{
  almeida2015,
  title={Sombric horizon: five decades without evolution},
  volume={72},
  ISSN={0103-9016},
  url={https://doi/org/10.1590/0103-9016-2014-0111},
  DOI={10.1590/0103-9016-2014-0111},
  number={1},
  journal={Scientia Agricola},
  author={de Almeida, Jaime Antonio and Lunardi Neto, Antônio and Vidal-Torrado, Pablo},
  year={2015},
  month={Feb},
  pages={87–95} }

@phdthesis{
  asiamah2000,
  place={Kumasi, Ghana},
  title={Plinthite and conditions for its hardening in agricultural soils in Ghana},
  school={Kwame Nkrumah University of Science and Technology},
  author={Asiamah, R. D.},
  year={2000} }

@report{
  blakemore1987,
  place={Lower Hutt, New Zealand},
  series={New Zealand Soil Bureau Scientific Report},
  title={Methods for chemical analysis of soils},
  ISSN={0304-1735},
  note={Previous editions published as NZ Soil Bureau Scientific Report 10A DOI: 10.7931/DL1-SBSR-80 ISSN: 0304-1735},
  number={80},
  institution={New Zealand Department of Scientific and Industrial Research},
  author={Blakemore, L. C. and Searle, P. L. and Daly, B. K.},
  year={1987},
  pages={103},
  url={https://doi.org/10.7931/DL1-SBSR-80},
  collection={New Zealand Soil Bureau Scientific Report} }

@book{
  blum2018,
  place={Stuttgart},
  title={Essentials of soil science: soil formation, functions, use and classification (World reference Base, WRB)},
  ISBN={978-3-443-01090-4},
  pagetotal = {171},
  publisher={Borntraeger Science Publishers},
  author={Blum, Winfried E. H. and Schad, Peter and Nortcliff, Stephen},
  url={https://www.schweizerbart.de/publications/detail/isbn/9783443010904},
  year={2018} }

@book{
  blume2010,
  place={Heidelberg, Germany},
  edition={3},
  title={Bodenkundliches Praktikum: Eine Einführung in pedologisches Arbeiten für Ökologen, insbesondere Land- und Forstwirte, und für Geowissenschaftler},
  ISBN={978-3-8274-1553-0 978-3-8274-2733-5},
  url={https://doi.org/10.1007/978-3-8274-2733-5},
  DOI={10.1007/978-3-8274-2733-5},
  publisher={Springer},
  author={Blume, Hans-Peter and Stahr, Karl and Leinweber, Peter},
  year={2010} }

@article{
  broll2006,
  title={Topsoil characterization—recommendations for revision and expansion of the FAO-Draft (1998) with emphasis on humus forms and biological features},
  volume={169},
  ISSN={1436-8730},
  url={https://doi.org/10.1002/jpln.200521961},
  DOI={10.1002/jpln.200521961},
  number={3},
  journal={Journal of Plant Nutrition and Soil Science},
  author={Broll, Gabriele and Brauckmann, Hans-Jörg and Overesch, Mark and Junge, Birte and Erber, Claudia and Milbert, Gerhard and Baize, Denis and Nachtergaele, Freddy},
  year={2006},
  month={Jun},
  pages={453–461} }

@book{
  bodenkun1995,
  place={Bonn},
  series={DVWK-Regeln zur Wasserwirtschaft},
  title={Bodenkundliche Untersuchungen im Felde zur Ermittlung von Kennwerten zur Standortcharakterisierung: Teil I: Ansprache der Böden},
  ISBN={978-3-89554-024-0},
  note={DVWK = Deutscher Verband für Wasserwirtschaft und Kulturbau e. V.},
  publisher={Wirtschafts- und Verlagsgesellschaft Gas und Wasser},
  editor={DVWK,},
  year={1995},
  collection={DVWK-Regeln zur Wasserwirtschaft} }

@book{
  costassociation2004,
  title={Final Report - COST-622 Soil Resources of European Volcanic Systems (1998-2004)},
  url={https://www.cost.eu/actions/622/},
  author={COST Association,},
  year={2004},
  pages={16} }

@report{
  fao-unesco-isric1988,
  place={Rome, Italy},
  title={Soil map of the world, Revised legend},
  number={60},
  pages = {110},
  institution={FAO-UNESCO-ISRIC},
  author={FAO-UNESCO-ISRIC,},
  url = {https://www.isric.org/sites/default/files/isric_report_1988_01.pdf},
  year={1988},
  month={Feb} }

@book{
  fao-unesco1971,
  place={Rome, Italy},
  title={Soil map of the world 1:5 000 000},
  url={https://www.fao.org/soils-portal/data-hub/soil-maps-and-databases/faounesco-soil-map-of-the-world/en/},
  publisher={UNESCO},
  author={FAO-UNESCO,},
  year={1971–1981} }

@book{
  fao-unesco1974,
  place={Paris, France},
  title={Soil map of the world 1:5 000 000 - Legend},
  volume={1},
  ISBN={92-3-101125-1},
  url={https://www.fao.org/3/as360e/as360e.pdf},
  publisher={UNESCO},
  author={FAO-UNESCO,},
  year={1974} }

@article{
  fieldes1966,
  title={The Nature of Allophane in Soils, Part 3 - Rapid field and laboratory test for allophane},
  volume={9},
  url={https://www.google.com/books/edition/The_Nature_of_Allophane_in_Soils/3UD9cQAACAAJ?hl=en},
  note={NB this journal isn't properly online and has no DOIs},
  journal={New Zealand Journal of Science},
  author={Fieldes, Morice and Perrott, K. W.},
  year={1966},
  pages={623–629} }

@inproceedings{
  fox2010,
  place={Brisbane, Queensland, Australia},
  title={New A Horizon Protocols for Topsoil Characterization in Canada},
  url={https://www.old.iuss.org/19th%20WCSS/Symposium/pdf/0467.pdf},
  note={paper #467},
  booktitle={19th World Congress of Soil Science Proceedings, Symposium 1.4.2},
  author={Fox, Catherine A. and Tarnocai, Charles and Broll, Gabrielle},
  year={2010},
  month={Aug},
  pages={9–12} }

@inproceedings{
  graefe2012,
  place={Bari, Italy},
  title={Adapting humus form classification to WRB principles},
  booktitle={EUROSOIL 2012 Book of Abstracts},
  publisher={ECSSS},
  author={Graefe, Ulfert and Baritz, Rainer and Broll, Gabriele and Kolb, Eckart and Milbert, Gerhard and Wachendorf, Christine},
  year={2012},
  month={Jul},
  url={https://www.ifab-hamburg.de/documents/Graefe_et_al_poster_2012a.pdf},
  pages={954} }

@book{
  isss-isricfao1998,
  place={Rome},
  series={World Soil Resources Reports},
  title={World Reference Base for Soil Resources},
  volume={106},
  ISBN={92-5-104141-5},
  url={https://www.fao.org/3/w8594e/w8594e00.htm},
  note={No PDF version available - HTML only},
  publisher={FAO},
  author={ISSS-ISRIC_FAO,},
  year={1998},
  collection={World Soil Resources Reports} }

@book{
  hewitt1992,
  place={Lower Hutt, N.Z.},
  edition={1},
  series={DSIR Land Resources scientific report},
  title={New Zealand soil classification (v. 3.0)},
  ISBN={978-0-477-02649-9},
  ISSN={1170-5965},
  publisher={DSIR Land Resources},
  author={Hewitt, A. E.},
  year={1992},
  url={https://doi.org/10.7931/DL1-LRSS-1-2010},
  collection={DSIR Land Resources scientific report} }

@book{
  internationalorganizationforstandardization2015,
  edition={2},
  title={Soil quality — Determination of particle size distribution in mineral soil material — Method by sieving and sedimentation. ISO 11277:2009},
  url={https://www.iso.org/standard/54151.html},
  note={Revised by https://www.iso.org/standard/69496.html ISO 11277:2020},
  author={International Organization for Standardization,},
  year={2015} }

@article{
  ito1991,
  title={Differentiation of a Spodic Horizon from a Buried A Horizon},
  volume={55},
  ISSN={0361-5995},
  url={https://doi.org/10.2136/sssaj1991.03615995005500020024x},
  DOI={10.2136/sssaj1991.03615995005500020024x},
  number={2},
  journal={Soil Science Society of America Journal},
  author={Ito, Toyoaki and Shoji, Sadao and Shirato, Yasuhito and Ono, Eri},
  year={1991},
  month={Mar},
  pages={438–442} }

@book{
  iussworkinggroupwrb2015,
  place={Rome},
  series={World Soil Resources Reports},
  title={World Reference Base for Soil Resources 2014, update 2015},
  volume={106},
  ISBN={978-92-5-108370-3},
  url={https://www.fao.org/soils-portal/soil-survey/soil-classification/world-reference-base/en/},
  note={ISSN 0532-0488},
  publisher={FAO},
  author={IUSS Working Group WRB,},
  year={2015},
  collection={World Soil Resources Reports} }

@article{
  jabiol2013,
  title={A proposal for including humus forms in the World Reference Base for Soil Resources (WRB-FAO)},
  volume={192},
  ISSN={0016-7061},
  url={https://doi.org/10.1016/j.geoderma.2012.08.002},
  DOI={10.1016/j.geoderma.2012.08.002},
  journal={Geoderma},
  author={Jabiol, Bernard and Zanella, Augusto and Ponge, Jean-François and Sartori, Giacomo and Englisch, Michael and van Delft, Bas and de Waal, Rein and Le Bayon, Renée-Claire},
  year={2013},
  month={Jan},
  pages={286–294} }

@article{
  juilleret2016,
  title={Mind the gap: A classification system for integrating the subsolum into soil surveys},
  volume={264},
  ISSN={0016-7061},
  url={https://doi.org/10.1016/j.geoderma.2015.08.031},
  DOI={10.1016/j.geoderma.2015.08.031},
  journal={Soil mapping, classification, and modelling: history and future directions},
  author={Juilleret, Jérôme and Dondeyne, Stefaan and Vancampenhout, Karen and Deckers, Jozef and Hissler, Christophe},
  year={2016},
  month={Feb},
  pages={332–339} }

@article{
  juilleret2018,
  title={Where are we with whole regolith pedology? A comparative study from Brazil},
  volume={35},
  ISSN={0257-1862, 2167-034X},
  url={https://doi.org/10.1080/02571862.2017.1411537},
  DOI={10.1080/02571862.2017.1411537},
  number={4},
  journal={South African Journal of Plant and Soil},
  author={Juilleret, Jérôme and de Azevedo, Antonio C and Santos, Roseclenia A and dos Santos, Jean CB and Pedron, Fabricio de A and Dondeyne, Stefaan},
  year={2018},
  month={Aug},
  pages={251–261} }

@article{
  kabala2018,
  title={Towards more simple and coherent chemical criteria in a classification of anthropogenic soils: A comparison of phosphorus tests for diagnostic horizons and properties},
  volume={320},
  ISSN={0016-7061},
  url={https://doi.org/10.1016/j.geoderma.2018.01.024},
  DOI={10.1016/j.geoderma.2018.01.024},
  journal={Geoderma},
  author={Kabała, Cezary and Galka, Bernard and Labaz, Beata and Anjos, Lucia and de Souza Cavassani, Rafael},
  year={2018},
  month={Jun},
  pages={1–11} }

@book{
  kellogg2014,
  place={Lincoln, Nebraska, USA},
  edition={5.0},
  series={Soil Survey Investigations Report},
  title={Kellogg Soil Survey Laboratory Methods Manual},
  publisher={United States Department of Agriculture},
  editor={Burt, Rebecca},
  year={2014},
  url={https://digitalcommons.unl.edu/usdaarsfacpub/2115/},
  collection={Soil Survey Investigations Report} }

@book{
  köppen1936,
  place={Berlin, Germany},
  series={Handbuch der Klimatologie},
  title={Das geographische System der Klimat (The Geographical System of the Climate)},
  url={https://commons.wikimedia.org/wiki/File:Das_geographische_System_der_Klimate_(1936).pdf},
  publisher={Gebrüder Borntraeger},
  author={Köppen, Wladimir Peter},
  year={1936},
  collection={Handbuch der Klimatologie} }

@article{
  krogh1999,
  title={Evaluation of World Reference Base for Soil Resources and FAO Soil Map of the World using nationwide grid soil data from Denmark},
  volume={15},
  ISSN={0266-0032},
  url={https://doi.org/10.1111/j.1475-2743.1999.tb00082.x},
  DOI={10.1111/j.1475-2743.1999.tb00082.x},
  number={3},
  journal={Soil Use and Management},
  author={Krogh, L. and Greve, M.H.},
  year={1999},
  month={Sep},
  pages={157–166} }

@article{
  mehlich1984,
  title={Mehlich 3 soil test extractant: A modification of Mehlich 2 extractant},
  volume={15},
  ISSN={0010-3624},
  url={https://doi.org/10.1080/00103628409367568},
  DOI={10.1080/00103628409367568},
  number={12},
  journal={Communications in Soil Science and Plant Analysis},
  author={Mehlich, A.},
  year={1984},
  month={Dec},
  pages={1409–1416} }

@article{
  miller2020,
  title={The colluvium and alluvium problem: Historical review and current state of definitions},
  volume={209},
  ISSN={0012-8252},
  url={https://doi.org/10.1016/j.earscirev.2020.103316},
  DOI={10.1016/j.earscirev.2020.103316},
  journal={Earth-Science Reviews},
  author={Miller, Bradley A. and Juilleret, Jérôme},
  year={2020},
  month={Oct},
  pages={103316} }

@article{
  nachtergaele2005,
  title={The “Soils” To Be Classified in the World Reference Base for Soil Resources},
  volume={38},
  issue={Suppl. 1},
  journal={Eurasian Soil Science},
  author={Nachtergaele, F.},
  year={2005},
  month={Jan},
  pages={13–19} }

@book{
  nationalcommitteeonsoilandterrain2009,
  place={Collingwood, Vic.},
  edition={3},
  series={Australian Soil and Land Survey Handbooks},
  title={Australian soil and land survey field handbook},
  ISBN={978-0-643-09395-9 0-643-09395-8},
  url={https://www.publish.csiro.au/book/5230/},
  publisher={CSIRO Publishing},
  author={National Committee On Soil And Terrain,},
  year={2009},
  collection={Australian Soil and Land Survey Handbooks} }

@book{
  naturalengland2008,
  title={Soil texture},
  url={https://publications.naturalengland.org.uk/publication/32016},
  number={TIN037},
  institution={Natural England},
  author={Natural England,},
  year={2008},
  month={Feb},
  pages={6} }

@book{
  piper1942,
  place={Adelaide, South Australia},
  title={Soil and plant analysis. A laboratory manual of methods for the examination of soils and the determination of the inorganic constituents of plants},
  ISBN={978-93-83784-20-2},
  publisher={Waite Agricultural Research Institute},
  url={https://archive.org/details/soilplantanalysi0000clar},
  note={Archive.org version is a 1950 reprint},
  author={Piper, C. S.},
  year={1942} }

@article{
  prietzel2019,
  title={A concept to optimize the accuracy of soil surface area and SOC stock quantification in mountainous landscapes},
  volume={356},
  ISSN={0016-7061},
  url={https://10.1016/j.geoderma.2019.113922},
  DOI={10.1016/j.geoderma.2019.113922},
  journal={Geoderma},
  author={Prietzel, Jörg and Wiesmeier, Martin},
  year={2019},
  month={Dec},
  pages={113922} }

@book{
  procedur2002,
  place={Wageningen, Netherlands},
  edition={6},
  title={Procedures for Soil Analysis},
  ISBN={90-6672-044-1},
  publisher={International Soil Reference and Information Centre},
  editor={van Reeuwijk, L. P.},
  url={https://www.isric.org/sites/default/files/ISRIC_TechPap09.pdf},
  year={2002} }

@article{
  rennert2019,
  title={Wet-chemical extractions to characterise pedogenic Al and Fe species – a critical review},
  volume={57},
  ISSN={1838-675X},
  url={https://doi.org/10.1071/SR18299},
  DOI={10.1071/SR18299},
  number={1},
  journal={Soil Research},
  author={Rennert, Thilo},
  year={2019},
  pages={1} }

@book{
  schoeneberger2012,
  place={Lincoln, NE, USA},
  title={Field book for describing and sampling soils, Version 3.0},
  publisher={Natural Resources Conservation Service, National Soil Survey Center},
  author={Schoeneberger, P. J. and Wysocki, D. A. and Benham, E. C. and Soil Survey Staff},
  url={https://www.nrcs.usda.gov/sites/default/files/2022-09/field-book.pdf},
  year={2012},
  month={Sep} }

@book{
  schultz2005,
  place={Berlin},
  edition={2},
  title={The ecozones of the world: the ecological divisions of the geosphere},
  ISBN={978-3-540-20014-7},
  url={https://doi.org/10.1007/3-540-28527-X},
  DOI={10.1007/3-540-28527-X},
  publisher={Springer},
  author={Schultz, Jürgen},
  year={2005} }

@article{
  shoji1996,
  title={Evaluation and proposed revisions of criteria for Andosols in the world reference base for soil resources},
  volume={161},
  ISSN={0038-075X},
  url={https://doi.org/10.1097/00010694-199609000-00005},
  DOI={10.1097/00010694-199609000-00005},
  number={9},
  journal={Soil Science},
  author={Shoji, Sadao and Nanzyo, Masami and Dahlgren, Randy A. and Quantin, Paul},
  year={1996} }

@book{
  soilsciencedivisionstaff2017,
  place={USA},
  edition={3},
  series={Agriculture Handbook},
  title={Soil Survey Manual},
  url={https://www.nrcs.usda.gov/resources/guides-and-instructions/soil-survey-manual},
  publisher={United States Department of Agriculture},
  author={Soil Science Division Staff,},
  year={2017},
  month={Mar},
  collection={Agriculture Handbook} }

@book{
  soilsurveystaff1999,
  place={Washington D.C., USA},
  edition={2},
  series={Agriculture Handbook},
  title={Soil Taxonomy: A basic system of Soil Classification for Making and Interpreting Soil Surveys},
  url={https://www.nrcs.usda.gov/resources/guides-and-instructions/soil-taxonomy},
  publisher={United States Department of Agriculture},
  author={Soil Survey Staff,},
  year={1999},
  collection={Agriculture Handbook} }

@book{
  sokolov1997,
  place={Moskva},
  title={Pochvoobrazovanie i ėkzogenez (Soil formation and exogenesis)},
  ISBN={978-5-86921-024-1},
  url={https://www.rfbr.ru/library/books/1487/},
  note={Full text available at URL},
  publisher={Rossiĭskai︠a︡ akademii︠a︡ s.-kh. nauk, Pochvennyĭ in-t im. V.V. Dokuchaeva},
  author={Sokolov, I. A.},
  year={1997} }

@article{
  sullivan2000,
  title={A modified chromium-reducible sulfur method for reduced inorganic sulfur: optimum reaction time for acid sulfate soil},
  volume={38},
  url={https://doi.org/10.1071/SR99088},
  DOI={10.1071/SR99088},
  number={3},
  journal={Australian Journal of Soil Research},
  publisher={CSIRO Publishing},
  author={Sullivan, Leigh A. and Bush, Richard T. and McConchie, D. M.},
  year={2000},
  pages={729–734} }

@article{
  takahashi2004,
  title={Proposed revisions to the diagnostic criteria for andic and vitric horizons and qualifiers of andosols in the world reference base for soil resources},
  volume={50},
  ISSN={0038-0768},
  url={https://doi.org/10.1080/00380768.2004.10408497},
  DOI={10.1080/00380768.2004.10408497},
  number={3},
  journal={Soil Science and Plant Nutrition},
  author={Takahashi, Tadashi and Nanzyo, Masami and Shoji, Sadao},
  year={2004},
  month={Feb},
  pages={431–437} }

@article{
  thien1979,
  title={A flow diagram for teaching texture-by-feel analysis},
  volume={8},
  ISSN={0094-2391},
  url={https://doi.org/10.2134/jae.1979.0054},
  DOI={10.2134/jae.1979.0054},
  number={1},
  journal={Journal of Agronomic Education},
  author={Thien, Steve J.},
  year={1979},
  month={Jan},
  pages={54–55} }

@book{
  un-fao2006,
  place={Rome, Italy},
  edition={4},
  title={Guidelines for soil description},
  ISBN={92-5-105521-1},
  url={https://www.fao.org/4/a0541e/a0541e.pdf},
  note={Prepared by Jahn, R., Blume, H.-P., Asio, V.B., Spaargaren, O., Schad, P.},
  publisher={UN-FAO},
  author={UN-FAO,},
  year={2006} }

@article{
  uzarowicz2017,
  title={Technogenic soils (Technosols) developed from fly ash and bottom ash from thermal power stations combusting bituminous coal and lignite. Part I. Properties, classification, and indicators of early pedogenesis},
  volume={157},
  ISSN={0341-8162},
  url={https://doi.org/10.1016/j.catena.2017.05.010},
  DOI={10.1016/j.catena.2017.05.010},
  journal={CATENA},
  author={Uzarowicz, Łukasz and Zagórski, Zbigniew and Mendak, Emilia and Bartmiński, Piotr and Szara, Ewa and Kondras, Marek and Oktaba, Lidia and Turek, Agnieszka and Rogoziński, Radosław},
  year={2017},
  month={Oct},
  pages={75–89} }

@book{
  varghese1993laterite,
  series={Technical monograph},
  title={Laterite soils: Their distribution, characteristics, classification and management},
  url={https://books.google.com/books?id=_eBKHAAACAAJ},
  publisher={Government of Kerala, State Committee on Science, Tech & Environment},
  author={Varghese, T.M. and Byju, G.},
  year={1993},
  collection={Technical monograph} }

@book{
  worldre2006,
  place={Rome, Italy},
  edition={2},
  series={World soil resources reports},
  title={World reference base for soil resources 2006},
  ISBN={978-92-5-105511-3},
  publisher={Food and Agriculture Organization of the United Nations},
  editor={IUSS Working Group WRB,},
  year={2006},
  pages={128},
  url={https://www.fao.org/fileadmin/templates/nr/images/resources/pdf_documents/wrb2007_red.pdf},
  collection={World soil resources reports} }

@article{
  zanella2018,
  title={Humusica 1, article 5: Terrestrial humus systems and forms — Keys of classification of humus systems and forms},
  volume={122},
  ISSN={0929-1393},
  url={https://doi.org/10.1016/j.apsoil.2017.06.012},
  DOI={10.1016/j.apsoil.2017.06.012},
  journal={HUMUSICA 1 - Terrestrial Natural Humipedons},
  author={Zanella, Augusto and Ponge, Jean-François and Jabiol, Bernard and Sartori, Giacomo and Kolb, Ekart and Le Bayon, Renée-Claire and Gobat, Jean-Michel and Aubert, Michaël and De Waal, Rein and Van Delft, Bas and et al.},
  year={2018},
  month={Jan},
  pages={75–86} }

@article{mehra1960,
	title = {Iron oxide removal from soils and clays by a dithionite-citrate system buffered with sodium bicarbonate},
	author = {Mehra, O. P. and Jackson, M. L.},
	year = {1960},
	date = {1960},
	journal = {Clays and Clay Minerals},
	pages = {317--327},
	volume = {7},
	doi={10.1016/B978-0-08-009235-5.50026-7},
	url={https://doi.org/10.1016/B978-0-08-009235-5.50026-7},
	note = {Place: Department of Soils, University of Wisconsin, Madison, WI}
}

@article{holmgren1967,
	title = {A Rapid Citrate-Dithionite Extractable Iron Procedure},
	author = {Holmgren, George G. S.},
	year = {1967},
	month = {03},
	date = {1967-03-01},
	journal = {Soil Science Society of America Journal},
	pages = {210--211},
	volume = {31},
	number = {2},
	doi = {10.2136/sssaj1967.03615995003100020020x},
	url = {https://doi.org/10.2136/sssaj1967.03615995003100020020x},
}