URI: https://soilwise-he.github.io/soil-health#CropProduction
https://soilwise-he.github.io/soil-health#CropProduction
http://www.eionet.europa.eu/gemet/concept/13209
http://opendata.inrae.fr/thesaurusINRAE/c_4022
http://aims.fao.org/aos/agrovoc/c_5976
Holland2019
Walker2011
phosphorus availability
magnesium availability
calcium availability
potassium availability
