Experiment #601 Long-term Top-Dress N Trial Stillwater, OK

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Presentation transcript:

Experiment #601 Long-term Top-Dress N Trial Stillwater, OK Established 2002 TRT Preplant N rate lb/ac† Top-dress N rate lb/ac‡ Total N February March 1.** - 2. 45 3. 90 4. 135 5.** 6. 7. 8. 45* 9.** 10. 11. 12. 180 13. 14. † - Pre-Plant N applied as urea (46-0-0) ‡ - Top-Dress N applied as UAN (28-0-0) * - UAN ** - YP Plot Location: LCB 36° 8'22.97"N, 97°16'56.53"W N E S W Plot size: 16’ x 30’ Alley: 10’ Total Trial Area: 150’ x 224’ OBJECTIVE: Evaluate top-dress nitrogen applications in winter wheat. Treatments 1, 2, 3, and 4 were moved to February application in Spring 2019 1, 2 – Harvest Sequence Number 1, 2 – Treatment Number 1 , 2 – Soil Sample Sequence Number 150 4 5 12 13 20 21 28 29 36 37 44 45 52 53 Rep 4 7 2 8 11 6 9 1 10 3 14 120 43 46 47 48 49 50 51 54 55 56 110 3 6 11 14 19 22 27 30 35 38 43 46 51 54 Rep 3 1 13 10 5 7 2 9 4 12 8 80 29 31 32 33 34 36 37 39 40 41 42 70 2 7 10 15 18 23 26 31 34 39 42 47 50 55 Rep 2 11 4 1 3 14 5 6 9 13 12 8 40 16 17 19 20 21 22 24 25 27 28 30 1 8 9 16 17 24 25 32 33 40 41 48 49 56 Rep 1 6 12 3 13 2 11 7 5 10 14 4 64 80 96 112 128 144 160 176 192 208 224