OSU Green Seeker Update 2006 07 Ramp Program
- Slides: 12
OSU Green. Seeker Update 2006 -07 Ramp Program � 586 farmer’s fields 2007 -2008 (3000 -4000, N Rich or Ramps)
Lahoma, OK, Winter Wheat Exp. 502, 1971 -2007 N rate = (N uptake 100 lb/ac - N uptake 40 lb/ac)/0. 5 80 100 70 50 Optimum N rate, lb/ac 60 50 40 0 30 20 -50 2006 2004 2002 2000 1998 1996 1994 1992 1990 1988 1986 1984 1982 1980 1978 1976 1974 0 1971 10 -100 Net Loss and/or Gain, $/ac Optimum N Rate (assuming 40 lbs N/ac preplant) Average Yield Avg. 60 N/ac 42. 8 bu/ac +/- 12. 7 Avg. Loss = $27. 5/acre (N at $0. 70/lb)
SBNRC (YP 0*RI = YPN) 100 Pre (100 lbs N/ac applied preplant)
Mead, NE, 1969 - 1983
200 Mead, NE, 1969 -1983 180 Yield, bu/ac 160 140 120 100 80 0 90 60 180 270 40 1967 1969 1971 1973 1975 Year 1977 1979 1981 1983 1985
Mead NE, 1969 -1983 200 Maximum YIeld, bu/ac 180 160 140 120 100 R 2 = 0, 0033 80 60 40 20 0 50 100 150 200 Optimum N Rate 250 300
Data compiled by Dr. Robert Mullen, The Ohio State University 300 Ohio, 1998 -2007 Avg. RI: 1. 68 ± 81 Avg. Max Yield: 182 bu/ac ± 33 Maximum Yield, bu/ac 250 200 150 100 R 2 = 0, 0142 50 0 0 1 2 3 4 Response Index 5 6 7
Data compiled by Dr. Robert Mullen, The Ohio State University 300 Ohio, 1998 -2007 Avg. Opt N Rate: 154 lbs N/ac ± 51 Avg. RI: 1. 68 ±. 81 Optimum N Rate, lb/ac 250 200 150 100 R 2 = 0, 1433 50 0 0 1 2 3 4 Response Index 5 6 7
Data compiled by Dr. Robert Mullen, The Ohio State University Ohio, 1998 -2007 300 Avg. Opt N Rate: 154 lbs N/ac ± 51 Avg. Max Yield: 182 bu/ac ± 33 Maximum Yield, bu/ac 250 200 150 100 50 R 2 = 0, 0000 0 0 50 100 150 200 Optimum N Rate, lb/ac 250 300
SBNRC (YP 0*RI = YPN) Ohio, 1998 -2007 300 Avg. N Rate Pred: 88 lbs N/ac ± 50 Avg. N Rate Obs. 120 lbs N/ac ± 46 N Rate Observed 250 200 150 100 50 R 2 = 0, 4232 0 0 50 100 150 N Rate Predicted 200 250
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%
