{{For|the community|Menfro, Missouri}} thumb|right|Menfro strata '''Menfro soil''' is a series of deep, well drained, moderately permeable soils formed in {{convert|6|to|20|ft|m|sp=us|adj=on}} thick loess deposits. It is found in central and eastern Missouri and west-central and southwestern Illinois on upland ridgetops, backslopes, and benches adjacent to the Missouri and Mississippi rivers and their major tributaries. Menfro soils are prime farmland where the slope is less than 6 percent.
Menfro soil strata consist of: {| class="wikitable" style="margin: auto auto auto 3em" |- | Surface layer || dark brown silt loam |- | Subsurface layer || brown silt loam |- | Subsoil - upper || brown silt loam |- | Subsoil - lower || dark brown silty clay loam |- | Substratum || brown silt loam |}
Menfro is the state soil of Missouri.<ref>{{cite web | url = http://www.house.mo.gov/billtracking/bills041/bills/HCR10.htm | title = HCR10 - Menfro Soil | publisher = Missouri House of Representatives | date = 2004-05-07 | accessdate = 2010-07-24 }}</ref><ref>{{cite web | url = http://www.house.mo.gov/content.aspx?info=/bills041/action/aHCR10.htm | title = Activity History for HCR10 | date = 2004-11-04 | accessdate = 2010-07-24 | publisher = Missouri House of Representatives }}</ref><ref>{{cite web | url = http://www.senate.mo.gov/04INFO/journals/DAY67.htm | title = Journal of the Senate | date = 2004-05-07 | publisher = Missouri Senate | accessdate = 2010-07-24 }}</ref> It was the first soil to go on display when Scientists from the Natural Resources Conservation Service of the USDA, the Soil Science Society of America and others worked with exhibit designers from the Smithsonian Institution on a display of soil monoliths from every state.<ref>{{cite web | url = http://www.usda.gov/wps/portal/!ut/p/_s.7_0_A/7_0_1OB/.cmd/ad/.ar/sa.retrievecontent/.c/6_2_1UH/.ce/7_2_5JM/.p/5_2_4TQ/.d/1/_th/J_2_9D/_s.7_0_A/7_0_1OB?PC_7_2_5JM_contentid=2005/02/0054.xml&PC_7_2_5JM_navtype=RT&PC_7_2_5JM_parentnav=LATEST_RELEASES&PC | archive-url = https://web.archive.org/web/20050915020513/http://www.usda.gov/wps/portal/!ut/p/_s.7_0_A/7_0_1OB/.cmd/ad/.ar/sa.retrievecontent/.c/6_2_1UH/.ce/7_2_5JM/.p/5_2_4TQ/.d/1/_th/J_2_9D/_s.7_0_A/7_0_1OB?PC_7_2_5JM_contentid=2005/02/0054.xml&PC_7_2_5JM_navtype=RT&PC_7_2_5JM_parentnav=LATEST_RELEASES&PC | url-status = dead | archive-date = September 15, 2005 | publisher = USDA Natural Resources Conservation Service | date = 2005-02-16 | title = USDA and Smithsonian Institution Present Soils Display }}</ref>
==Notes== <references />
==References== *{{cite web |url = http://www2.ftw.nrcs.usda.gov/osd/dat/M/MENFRO.html |title = Menfro Series |work = National Cooperative Soil Survey |publisher = United States Department of Agriculture |date = August 2004 |accessdate = 2008-12-10 |url-status = dead |archiveurl = https://web.archive.org/web/20090322100025/http://www2.ftw.nrcs.usda.gov/osd/dat/M/MENFRO.html |archivedate = 2009-03-22 }} *{{Cite FTP |url = ftp://ftp-fc.sc.egov.usda.gov/NSSC/StateSoil_Profiles/mo_soil.pdf |server = United States Department of Agriculture Natural Resource Conservation Service |url-status = dead |title = Menfro -- Missouri State Soil |accessdate = 2008-12-10 }}
Category:Pedology Category:Soil in the United States Category:Geology of Missouri Category:Geology of Illinois Category:Types of soil Category:Symbols of Missouri