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Published online 1 September 1968
Published in Agron J 60:477-482 (1968)
© 1968 American Society of Agronomy
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Residual Nitrate Nitrogen in Fertilized Deep Loess-Derived Soils1

G. M. Herron, G. L. Terman, A. F. Dreier and R. A. Olson2

Asbtract: Distributions of NO3-N were studied in deep loess-derived profiles of Sharpsburg silty clay loam and Hastings-Crete silt loams cropped to irrigated corn (Zea mays L.) in eastern Nebraska. Only with soils very high in N and high applications of fertilizer N was there any indication of appreciable leaching of NO3-N below 180 cm in the profiles. Most of the water or KCI-extractable N was usually found in the surface 0-90 cm of soil. High correlations were found (r > 0.9) for a given soil site between amounts of NO3-N in the surface 30 cm and totals to 180 cm. However, the proportion found in the surface soil varied widely among years and sites. At a given site there was a high correlation between NO3-N in the profiles in the fall after harvest and corn yields without applied N the following year. Simple correlations of profile NO3-N with percentage yields for different years, soils and management levels, however, were usually too low to have predictive value.

Key Words: n leaching • availability of N, N fertilization of corn

1 Published with the approval of the Director as Paper No. 2280 of the Journal Series, Nebraska Agr. Exp. Sta., Lincoln. K. D. Frank made significant contributions to the field studies. The research was conducted in cooperation with the Division of Agricultural Development, TVA. The 1BN was provided under agreement by the U. S. Atomic Energy Commission through R. D. Hauck, TVA, who determined the 16N content of plant samples.

2 Former Research Assistant, now Assistant Professor, Garden City Branch Station, Garden City, Kan. 67846; Visiting Professor, Associate Professor, and Professor, Agronomy Department, University of Nebraska, Lincoln 68503 respectively.

Received for publication January 26, 1968.


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A. D. Halvorson, F. C. Schweissing, M. E. Bartolo, and C. A. Reule
Corn Response to Nitrogen Fertilization in a Soil with High Residual Nitrogen
Agron. J., July 13, 2005; 97(4): 1222 - 1229.
[Abstract] [Full Text] [PDF]


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Copyright © 1968 by the American Society of Agronomy.