Ultisol (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ultisol" in Spanish language version.

Last modified: 04:59:35, 20 June 2026 (UTC)

Ref.Un. Ref.Website

Global rank Spanish rank

23^rd place

56^th place

428^th place

304^th place

fao.org (Global: 428^th place; Spanish: 304^th place)

IUSS Working Group WRB (2015). «World Reference Base for Soil Resources 2014, Update 2015». World Soil Resources Reports 106, FAO, Rome.

jstor.org (Global: 23^rd place; Spanish: 56^th place)

Vitousek, P. M., and Sanford Jr., R. L. (1985). Nutrient cycling in moist tropical forest. Annual Review of Ecology and Systematics, 17, 137-167. https://www.jstor.org/stable/2096992