| Oakes Irrigation Research Site | |||||||||||||||
| Carrington Research Extension Center * North Dakota State University | |||||||||||||||
| P.O. Box 531, Oakes, ND 58474-0531, Phone: (701) 742-2744, FAX: (701) 742-2700, E-mail: | Blaine.Schatz@ndsu.edu | ||||||||||||||
| Leonard.Besemann@ndsu.edu | |||||||||||||||
| Strip-Till, Corn on Soybean, Nitrogen Rate Study | |||||||||||||||
| L. Besemann and H. Eslinger | |||||||||||||||
| The objective of this study was to compare corn yields of a corn/soybean rotation to those in a companion corn/corn rotation and to find differences in N response and other agronomic measurements in no-till rotations, utilizing strip-till. | |||||||||||||||
| MATERIALS AND METHODS | |||||||||||||||
| Soil: | Embden sandy loam, Embden loam, Gardena loam and Maddock sandy loam. Soil N average 14 lbs/acre. | ||||||||||||||
| Previous crop: | 2012 – soybean. | ||||||||||||||
| Seedbed preparation: | Strip-till May 18 with an Orthman strip-till machine. | ||||||||||||||
| Hybrid: | Pioneer P0062AMX | ||||||||||||||
| Planting: | Planted May 18 @ 33,000 plants per acre in 30-inch rows. | ||||||||||||||
| Plots: | Plots were 37 ft long by 15 ft (6 rows) wide. There were four replications. | ||||||||||||||
| Fertilizer: | All plots received a broadcast application of 31 lbs N/acre, 103 lbs P2O5/acre, 95 lbs K2O/acre, 26 lbs S/acre, and 3 lbs Zn/acre as 7‑25-23-6-1 May 2. All plots received 12 lbs N/acre and 40 lbs P2O5/acre as 10-34-0 via strip-till May 18. Stream‑bar all plots with 10 lbs N/acre and 23 lbs S/acre as 12‑0-0-26 May 23. Stream-bar 79 lbs N/acre as 28-0-0 to the 100 lb treatment and 44 lbs N/acre as 28‑0-0 to the 100D, 150 and 200 lb treatments May 25. Sidedress N treatments as 28‑0-0 (three inches deep) June 18; 200 lb treatments received 135 lbs N/acre, the 150 lb treatment received 85 lbs N/acre and the 100D received 35 lbs N/acre. | ||||||||||||||
| Irrigation: | Overhead sprinkler irrigation as needed. | ||||||||||||||
| Pest control: | Outlook (18 oz/acre) May 23, Laudis (3 oz/acre) + Roundup Power Max (40 oz/acre) + AAtrex 9-O (0.5 lb ai/acre) + Destiny (0.05%v/v) + AMS (1½ lbs/acre) June 13. | ||||||||||||||
| Remote sensing: | Remote sensing was achieved with an Opti-Sciences CCM 200 Plus chlorophyll meter and a Holland Crop Circle ACS active canopy sensor (normalized difference red edge – NDRE). | ||||||||||||||
| Harvest: | Hand harvest October 16 - October 18. Harvest area was the two center rows from each plot (72 feet of total row). | ||||||||||||||
| RESULTS | |||||||||||||||
| Determining nitrogen sufficiency in time is important to achieve N efficiency. Remote sensing utilizing a Holland Crop Circle ACS 430 active canopy sensor (normalized difference red edge – NDRE) and a Opti-Science CCM 200 chlorophyll meter were tested to determine ability to measure N sufficiency. | |||||||||||||||
| Increasing nitrogen rates (N) increased grain yield, chlorophyll meter readings and normalized difference red edge (NDRE). Remote sensing by chlorophyll meter and the Crop Circle Sensor did well in predicting corn N status. | |||||||||||||||
| Table 1. Strip-till, corn on soybean nitrogen rate study at the Oakes Irrigation Research Site in 2013. | |||||||||||||||
| Grain | Chlorophyll | ||||||||||||||
| Fertilizer | Grain | Yield | Harvest | Test | Meter | Nitrate-N | Seed | Emerge | Silk4 | Mature | |||||
| N Rate | Yield1 | 2009-13 | Moisture | Weight | Reading2 | NDRE3 | Stalk | Fall Soil | Population | Oil | Protein | Starch | Date | Date | Date |
| lb/acre | bu/ac | bu/ac | % | lb/bu | 6-Aug | 5-Aug | ppm | lbs | plants/ac | ----------%----------- | |||||
| 22 | 158.8 | 129.4 | 24.4 | 46.6 | 18.4 | 0.3114 | 71 | 19 | 34848 | 1.7 | 6.9 | 76.5 | 31-May | 211.3 | 22-Sep |
| 100 | 200.7 | 185.0 | 24.3 | 47.2 | 27.3 | 0.3310 | 342 | 21 | 35613 | 2.0 | 7.5 | 75.6 | 31-May | 210.8 | 23-Sep |
| 100 D | 216.9 | 194.9 | 23.6 | 47.4 | 32.4 | 0.3170 | 137 | 21 | 36084 | 2.1 | 7.9 | 75.2 | 31-May | 211.8 | 23-Sep |
| 150 | 242.9 | 227.0 | 23.4 | 47.6 | 37.4 | 0.3270 | 1026 | 24 | 35849 | 2.0 | 8.3 | 74.8 | 31-May | 212.0 | 23-Sep |
| 200 | 245.3 | 236.1 | 23.2 | 48.2 | 40.8 | 0.3234 | 1903 | 28 | 35672 | 2.1 | 8.7 | 74.6 | 31-May | 211.0 | 23-Sep |
| Mean | 212.9 | 23.8 | 47.4 | 31.3 | 0.3220 | 696 | 22.6 | 2.0 | 7.9 | 75.3 | 211.4 | ||||
| C.V. (%) | 5.1 | 2.7 | 0.9 | 9.7 | 9.2 | 63.4 | 9.3 | 10.3 | 3.1 | 0.5 | 0.5 | ||||
| LSD 0.10 | 13.6 | 0.8 | 0.5 | 3.8 | NS | 556 | 2.6 | 0.3 | 0.3 | 0.5 | NS | ||||
| LSD 0.05 | 16.6 | NS | 0.6 | 4.7 | NS | 679 | 3.2 | NS | 0.4 | 0.6 | NS | ||||
| Planting Date = May 18; Harvest Date = October 17; Previous Crop = Soybean | |||||||||||||||
| 1 Yield adjusted to 15.5% moisture. | |||||||||||||||
| 2 Opti-Science CCM 200. | |||||||||||||||
| 3 Holland Crop Circle ACS active canopy sensor (normalized difference red edge) - NDRE. | |||||||||||||||
| 4 Jday of Silk: Julian day of year when hybrids reached 50% silk. Example: Jday 211 = July 30. | |||||||||||||||
| Oakes Irrigation Research Site | |||||||||||||||
| Variety trials | Crop index | Home page | Report 2013 | ||||||||||||
| Other corn Studies 2013 | |||||||||||||||
| Corn hybrid performance trial irrigated | |||||||||||||||
| Corn hybrid performance trial dryland | |||||||||||||||
| Fortix fungicide on field corn | |||||||||||||||
| KTS fertilizer-field corn | |||||||||||||||
| Mosaic fertilizer-field corn | |||||||||||||||
| Stoller corn | |||||||||||||||
| Strip-tilled corn N rate corn corn rotation | |||||||||||||||
| Stover removal corn/corn and corn/soybean rotation | |||||||||||||||