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Soil Science Society of America Journal Abstract -

The Influence of Forest and Pasture on the Genesis of a Humid Temperate-Region Ultisol1


This article in SSSAJ

  1. Vol. 47 No. 3, p. 560-566
    Received: Jan 22, 1982
    Accepted: Jan 10, 1983

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  1. W. Lee Daniels,
  2. D. F. Amos and
  3. J. C. Baker2



The influence of pasture vs. forest vegetation on the properties of a Typic Hapludult from the Blue Ridge Province of Virginia was examined. Three study sites containing both forest and pasture cover were chosen from a group of 20 randomly selected initial sites by a typical pedon computer program which used A horizon thickness, Bt horizon clay content, Ca + Mg content at a depth of 145 cm, and slope as selection parameters. Detailed soil analyses were conducted under pasture and forest vegetation at each of the three final study sites. Pasture B horizons were deeper, higher in clay content, and weaker in structure grade than forest B horizons. The influence of liming was pronounced in the pasture soils and resulted in significant downward movement of Ca and Mg over time. Residual liming and P fertilization effects were apparent after 25 years of forest occupancy on a formerly cropped site. These data indicate that morphological and chemical changes occur in these soils following forest to pasture conversion. These changes, particularly in B horizon morphology, may occur much more rapidly than commonly assumed.

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