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Lime Requirement Related to Physical and Chemical Properties of Nine Michigan Soils¹

ABSTRACT

Lime requirement of 9 Michigan soils was determined by incubating the soils for 13 weeks in the greenhouse after addition of varying rates of agricultural limestone. The initial pH of all soils was approximately 5.5. Lime requirement was correlated with cation-exchange capacity, organic matter content, exchangeable hydrogen per 100 g. soil, clay content, and lime requirement measured by the Shoemaker, McLean, and Pratt buffer method. Increase in soil pH after liming was significantly correlated with increase in percent base saturation within each soil type, but not between soil types. Liming did not appreciably affect the amount of exchangeable Mg and K or extractable P in the soils. At pH 5.5, liming increased yield of alfalfa on 6 soils, but not on the remaining 3 soils. Low yields were correlated with low calcium content in the plants.

¹ Authorized for publication by the Director as Journal Article No. 3161 of the Michigan Agr. Exp. Sta., E. Lansing. Presented before Div. IV, Soil Sci. Soc. Am., Aug. 23, 1962 at Ithaca, New York.

² Graduate Assistant, Professor, and Assistant Professor of Soil Science, respectively. The authors gratefully acknowledge the grant-in-aid in support of this research of the Michigan Agricultural Limestone Association.

Received for publication June 3, 1963.