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Published online 1 March 1959
Published in Agron J 51:152-156 (1959)
© 1959 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Multi-variable Equations Describing Fertility-Corn Yield Response Surfaces and Their Agronomic and Economic Interpretation1

Bruce L. Baird and D. D. Mason2

Synopsis: Representative polynomial equations and contour lines describing yield response surfaces obtained in corn fertility studies are presented for Norfolk and Portsmouth soils. Methods of interpretation are discussed. Increases in yield were attributed to nitrogen at each of the 23 locations on the former and at 10 of the 17 on the latter soils. P or K increased yields at seven locations on the Portsmouth soils but at none on Norfolk soil.

1 Joint contribution from Department of Soils and Department of Statistics, North Carolina Agr. Exp. Sta., Raleigh, in cooperation with the Division of Agricultural Relations, TVA. Approved as Paper No. 935 of the Journal Series of the North Carolina Agr. Exp. Sta. Presented before Div. IVb, Soil Science Society of America, Atlanta, Georgia. November 20, 1957.

2 Research Instructor of Soils and Professor of Experimental Statistics.






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Copyright © 1959 by the American Society of Agronomy.