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Effects of Good Management Following Soil Erosion¹

ABSTRACT

It has been reported previously that corn yields for a 2-year period on Bath flaggy silt loam, despite liberal fertilization, ranged from 17 to 88 bushels per acre depending upon past management and erosion during the preceding 11 years.

By the ninth year of continued good management, including fertilization and rotation and with a low rate of erosion, there were still significant residual effects of past treatments on productivity and on soil characteristics. Under a fertilizer treatment comparable to that followed during the initial 2-year period, corn yields ranged from 71 to 93 bushels per acre. This treatment provided nitrogen at the rate of 100 pounds per acre. Residual effects on yields were effectively masked when the rate was raised to 200 pounds per acre.

¹ Contribution from the Soil and Water Conservation Research Branch, A.R.S., U.S.D.A., in cooperation with the Cornell University Agr. Exp. Sta. Paper No. 417 in Cornell Agronomy Department Series. Presented before Div. VI, Soil Science Society of America, Cincinnati, Ohio, Nov. 15, 1956.

² Project Supervisor, Agricultural Research Service, and Associate Professor of Soil Technology, Agronomy Department, Ithaca, N. Y. Thanks are due John Lamb, who directed the early stages of the work; James McGuinness, for statistical analyses of data; and the Cornell University Agronomy Department Soil Test Laboratory for chemical tests.

Received for publication December 4, 1956. Accepted for publication March 12, 1957.