PH del sòl (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "PH del sòl" in Catalan language version.

refsWebsite

Global rank Catalan rank

438^th place

345^th place

usda.gov

soils.usda.gov

Soil Survey Division Staff. «Soil survey manual.1993. Chapter 3, selected chemical properties.». Soil Conservation Service. U.S. Department of Agriculture Handbook 18. [Consulta: 12 març 2011].