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Trafficability of Four Loess Soils¹

ABSTRACT

Strength of the 15- to 30-cm layer of 65 modal sites on Loring, Grenada, Calloway, and Henry silt loams varied as much within series as between. Thus, little accuracy of strength prediction was lost by grouping the series for trafficability purposes. The group equation relating strength to moisture content accounted for 66% of the strength variation.

¹ Contribution from the Southern Forest Exp. Sta., Forest Service, USDA, and the Army Mobility Research Branch, US Army Eng. Waterways Exp. Sta., Corps of Eng.

² Soil Scientist, Timber Management Laboratory, Crossett, Ark., and Soil Scientist, Army Mobility Research Branch, Trafficability Section, US Army Eng. Waterways Exp. Sta. Vicksburg, Miss., respectively. The authors are indebted to C. J. Finger, Soil Scientist Specialist, SCS, Little Rock, Ark., for classifying soils.

Received for publication May 16, 1966. Accepted for publication August 2, 1966.