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Bulk Density of a Fragipan Soil in Natural and Disturbed Profiles¹

ABSTRACT

Bulk density of horizons and layers in soil profiles at two locations (for natural soil and soil above pipelines and a tileline) showed that modification of the Erie channery silt loam fragipan by mechanical disturbance alone results in re-establishing dense soil layers in less than 11 years. Buried topsoil, however, was much less dense after 12 years.

¹ Department of Agronomy, paper no. 903, supported by the New York State Agr. Exp. Sta. at Cornell Univ., Hatch Project 344 and by a Cornell Univ. Faculty Research Grant.

² Formerly Assistant Professor of Soil Physics, Cornell Univ. Ithaca, New York; present address: Department of Agronomy, Pennsylvania State Univ., University Park, Pa. 16802; and Associate Professor of Soil Sci. in Resource Development, Cornell Univ., Ithaca, N.Y., respectively.

Received for publication December 3, 1971. Accepted for publication April 24, 1972.