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Clay Accumulation in Sola of Poorly Drained Soils of Western Ohio¹

ABSTRACT

Five pedons consisting of Hoytville (Ochraqualf), Toledo (Haplaquept), Montgomery (Haplaquoll), Brookston, and Pewamo (Argiaquolls) were investigated to establish the presence or absence of sufficient illuvial clay in the B horizons to meet the requirements for argillic horizons. Even though the B horizons of two pedons (Hoytville and Toledo) exhibited sufficient clay increase from the A to B horizon to qualify as argillic horizons, micromorphological analyses and reconstruction techniques indicate that none of the soils studied possess argillic horizons. Reconstruction techniques indicate that both carbonate leaching and shale disintegration contribute clay to the B2 horizons but that comminution of coarse clay and silt to fine clay is the dominant pedogenic process. Illuvial cutans account for < 1% of the cross-sectional area of thin sections, whereas stress cutans occur in up to 9% of the area of thin sections. It is our conclusion that reclassification of Brookston, Pewamo, Hoytville, and similar very poorly drained soils should be considered.

¹ Contribution from the Dep. of Agronomy, The Ohio State Univ., Ohio Agric. Research & Development Center, Journal Paper no. 78-80, and the Division of Lands & Soil, Ohio Dep. of Natural Resources, Columbus, OH 43210. Presented before Div. S-5, Soil Science Society of America, Houston, Tex., 30 Nov. 1976.

² Associate Professor, Ohio Agric. Research & Development Center and the Ohio State Univ.; Soil Survey Coordinator. Division of Lands & Soil, Ohio Dep. of Natural Resources; and Professor and Research Associate, Texas A & M Univ. The latter two were formerly members of the Agronomy Dep. at The Ohio State Univ.

Received for publication April 14, 1980. Accepted for publication October 7, 1980.