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Evaluation of Soil Moisture Measurements in Oklahoma as Soil Characteristics for Classification
Author(s) -
Nichols J. D.,
Stone J. F.
Publication year - 1970
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/sssaj1970.03615995003400040028x
Subject(s) - water content , environmental science , moisture , precipitation , linear regression , soil science , neutron probe , soil water , range (aeronautics) , regression analysis , hydrology (agriculture) , neutron , mathematics , geology , meteorology , materials science , neutron temperature , geotechnical engineering , geography , statistics , neutron cross section , physics , quantum mechanics , composite material
Soil moisture measurements were evaluated as soil moisture characteristics specified in the new soil classification system. Soil moisture measurements were made with a neutron probe at about weekly intervals and were available for 3 to 6‐year periods at four sites with a range in mean annual precipitation of 45 cm to 80 cm. The cumulative days were counted when the soil moisture was below −15 atm pressure in either or both of the 0 to 23‐cm increment and the 23 to 38‐cm increment. The count was also made for the control section of the 23 to 38‐cm increment and the 38 to 53‐cm increment. The data yielded close fitting linear regression lines for cumulative days dry in each year against the measured precipitation for that year. The regression lines for the two tested control sections were nearly alike. The neutron probe method seems to be a satisfactory method for determining days dry. Some adjustment of the data will likely be necessary in translating the data for use in the classification system.