表土 (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "表土" in Japanese language version.

refsWebsite

Global rank Japanese rank

438^th place

1,103^rd place

low place

low place

1,564^th place

3,249^th place

3,042^nd place

low place

cmu.edu

M. Ray Tucker, J. Kent Messick and Catherine Stokes (1995) Soil Fertility Note 14 : Topsoil. North Carolina Department of Agriculture. [2] (PDF)

U.S. Department of Agriculture (USDA), Soil Survey Division Staff (1993). "Soil Survey Manual." USDA Handbook 18. Chapter 3.

http://www.nrcs.usda.gov/technical/nri, "Summary Report, 2007 Natural Resources Inventory," Natural Resources Conservation Services, U. S. Department of Agriculture, December 2009, p. 97