Abstract
Soil organic matter content and soil chemical properties were examined for the Crosby-Kokomo Association near Columbus, Ohio. The soils are classified as fine, mixed, mesic, Aeric Ochraqualf and fine, mixed, mesic, Typic Argiaquoll, respectively. Effects of four tillage methods were studied, with and without subsurface drainage. Tillage methods were: ridge till, beds, no-till and conventional till. The tillage treatments were laid out according to the Randomized Block Design with three replicates on each drainage site. Soil samples, obtained in August, 1987 to 50 cm depth in 10 cm increments, were analyzed for soil chemical properties. Tillage methods has significant effects on soil organic matter, Bray-1 P, CEC and exchangeable Ca and K. In general, no-till and beds had significantly higher concentrations of organic matter in the surface layer than the other tillage treatments. Soil pH was lowest in the 10–20 cm depth soil layer and increased with increasing depth. Organic matter and Bray-1 P decreased significantly with depth. Improved soil drainage significantly decreased soil pH by 0.5 units, and soil organic matter content by 33% in the top layers. Subsurface drainage also decreased the concentration of Bray-1 P.
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