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Loess‐Derived Soils, Mississippi Valley Region: II. Soil‐Climate System
Author(s) -
Ruhe Robert V.
Publication year - 1984
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1984.03615995004800040033x
Subject(s) - loess , soil water , geology , precipitation , latitude , hydrology (agriculture) , environmental science , physical geography , soil science , geomorphology , geography , meteorology , geotechnical engineering , geodesy
In Typic Hapludalfs formed in Peoria loess along the Mississippi River Valley from Mississippi to Minnesota, the base status distinctly and abruptly differs at 37° to 38°N latitude. The Memphis soils to the south are more intensively and deeply leached of bases than Alford and Fayette soils to the north. This change coincides with an abrupt historic climatic difference in precipitation (normal and effective). Paleoclimatic reconstruction shows that the climatic boundary could have persisted throughout the Holocene and its changing environments. The constancy of climatic difference through time can account for the soil differences at the critical latitude.