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OSU GreenSeeker Update

This report presents findings from the Ohio State University's 2006-2007 GreenSeeker program that evaluates nitrogen (N) management in winter wheat fields. Analyzing data from 586 farmers' fields in Lahoma, OK, and Mead, NE, from 1969-2007, we determined the optimal nitrogen rates for enhancing yields and minimizing losses. An average nitrogen uptake of 100 lb/ac indicated that the optimum rate is around 60 lb/ac, yielding approximately 42.8 bushels per acre. The analysis also highlights the financial implications of nitrogen management strategies.

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OSU GreenSeeker Update

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  1. OSU GreenSeeker Update 2006-07 Ramp Program • 586 farmer’s fields 2007-2008 (3000-4000, N Rich or Ramps)

  2. Lahoma, OK, Winter Wheat Exp. 502, 1971-2007N rate = (N uptake 100 lb/ac - N uptake 40 lb/ac)/0.5 Optimum N Rate (assuming 40 lbs N/ac preplant) Average YieldAvg. 60 N/ac 42.8 bu/ac +/- 12.7Avg. Loss = $27.5/acre (N at $0.70/lb)

  3. SBNRC (YP0*RI = YPN)100 Pre (100 lbs N/ac applied preplant)

  4. Mead, NE, 1969 - 1983

  5. Data compiled by Dr. Robert Mullen, The Ohio State University

  6. Data compiled by Dr. Robert Mullen, The Ohio State University

  7. Data compiled by Dr. Robert Mullen, The Ohio State University

  8. SBNRC (YP0*RI = YPN)

  9. Home Run 4% In field double-triple 12% Pop fly-out 25% In-field single 25%In-field out 15% Pop-up out 10%In-field grounder 9%

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