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Some Effects of Kudzu versus Continuous Corn on Soil Properties and Crop Yields¹

ABSTRACT

In a continuing study of means of improving a soil with genetic pan, kudzu, a deep-rooted perennial legume, was introduced in rotation with corn. Following 4 years of kudzu, the nitrogen, organic carbon, and exchangeable potassium in the 0 to 12-inch soil were higher than in continuous corn plots. The bulk density was lower, and the porosity, aggregation, and intrinsic permeability were higher on the kudzu plots. Evidence, both from soil moisture studies and from uptake of deeply-placed radioactive phosphorus, indicated deeper rooting of corn following the kudzu. Corn yields were increased as a result of growing the legume, and, particularly in the absence of the legume, by supplemental nitrogen. Some data on the persistence of these effects are reported.

¹ Contribution from the Eastern Soil and Water Management Section, Soil and Water Conservation Branch, A.R.S., U.S.D.A., in cooperation with the Mississippi Agr. Exp. Sta., State College, Miss.

² Soil Scientist, S.W.C., U.S.D.A.; Superintendent, North Mississippi Branch Exp. Sta.; and Soil Scientist, S.W.C., A.R.S., respectively.

Received for publication October 20, 1954.