🌐EnglishEnglishDeutschFrançaisItalianoРусский中文日本語EntityQ2151066· pop 7· linked from 29 articlesRichards equationAlso known as Richards' equationnon-linear partial differential equation that represents the movement of water in unsaturated soilsAvailable in 7 languagesFrançaisDeutsch日本語РусскийItalianoHebrewvia Wikidata sitelinks · CC0Connectionsdifferential equationEntitydigital object identifierEntityCategoriesHydrologyPartial differential equationsSoil physics