/AnMtgsAbsts2009.54314 Maize (Zea-maize L.) Grain Yield Response to Nitrogen Applied at Different Distances Away From the Row.

Monday, November 2, 2009: 2:00 PM
Convention Center, Room 321, Third Floor

Jacob Vossenkemper1, Yumiko Kanke2, Daniel Edmonds3, Randy Taylor4, John Solie4 and William Raun5, (1)Plant and Soil Science, Oklahoma State Univ., Stillwater, OK
(2)Plant and Soil Sciences, Oklahoma State Univ., Stillwater, OK
(3)Oklahoma State Univ., Stillwater, OK
(4)Biosystems and Agricultural Engineering, Oklahoma State Univ., Stillwater, OK
(5)044 N. Ag Hall, Oklahoma State Univ., Stillwater, OK
Abstract:
Traditionally midseason fertilizer nitrogen (N) applications in corn are placed down the center of a 76 cm row, making the distance of application 38 cm from the plant.  This study was conducted to determine maize grain yield response to N placed at varying distances from the row.  Nitrogen rates were 0, 45, 90, and 134 kg N ha-1 placed at distances of 10, 20, and 30 cm from the row.  The effects of N placement (distance) from the row was investigated at the R.L. Westerman Irrigation Research Facility near Stillwater, Oklahoma on a Port-Oscar silt loam (fine-silty, mixed, super active, thermic Cumulic Haplustolls), and at Hennessey, Oklahoma on a Bethany silt loam (fine, mixed, thermic Pachic Paleustolls).  Maize yields were dependent upon N rate and the distance N was applied away from  the row.  Higher N rates (90 and 134 kg N ha-1) resulted in significantly higher yields the closer the N was placed to the row.