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Soil Science Society of America Journal Abstract -

Natric Horizons on Some Erosional Landscapes in Northwestern South Dakota1


This article in SSSAJ

  1. Vol. 49 No. 4, p. 947-952
    Received: July 13, 1984
    Accepted: Feb 12, 1985

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  1. W. F. Johnson,
  2. M. J. Mausbach,
  3. E. E. Gamble and
  4. R. E. Nelson2



Soils with natric horizons, associated slickspots, and soils with argillic horizons were sampled to study landscape relationships. These soils occur in microtopographic sequences that recur in spacings of 15 m or more. At two sites soils were sampled from trenches that transected the microtopographic sequence. At each site soils had a continuous argillic/natric horizon that was exposed at the surface in slickspots. Slickspots have an upslope scarp and appear to be dynamic erosion surfaces that migrate upslope. Salt content in and below the argillic horizon was highest in the slickspot and in pedons closest to the slickspot and decreased with distance outward from the slickspot. Content of soluble salt also appears to vary in the parent rock. It is suggested that lateral movement of salts and content of salt in the parent material are important in formation of the soils and that salts may be redistributed by the movement of the slickspots.

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