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:															Walter.Albus@ndsu.edu


Strip-Till, Corn on Corn Nitrogen Rate Study - 2011																				5 yrs corn/corn
				Population	Soil Nitrate-N																Return to⁴
Fertilizer³	Grain	Harvest	Test	After	Fall	Fall		Chlorophyll Meter			NDRE Reading			Stalk	Grain			Emerge	Silk	Mature	N Above
N Rate	Yield¹	Moisture	Weight	Green Snap	2011	2010		9-Aug	24-Aug		15-Jul	28-Jul	4-Aug	Nitrate-N	Oil	Protein	Starch	Date	Date	Date	Low N Rate
lb/ac	bu/ac	%	lb/bu		lb/ac	lb/ac								ppm	-----------%---------						$

25	99.8	16.4	55.2	31391	13	12		13.8	11.1		0.262	0.195	0.169	32	3.5	7.6	74.0	5/31	7/29	9/26	0
150d²	219.2	18.4	53.8	31200	18	19		45.3	44.4		0.350	0.307	0.301	453	3.4	8.4	73.4	6/1	7/26	10/2	535
200d²	227.2	18.4	54.0	30179	39	24		46.8	45.8		0.356	0.323	0.318	2592	3.6	8.7	73.0	6/1	7/26	9/30	550
150	214.6	18.6	54.3	34957	18	18		42.9	42.5		0.350	0.318	0.308	149	3.4	8.1	73.8	6/1	7/26	10/1	512
200	226.0	19.0	53.7	33501	38	22		45.5	45.9		0.355	0.328	0.318	2568	3.5	8.5	73.4	6/1	7/27	10/1	543

Mean	197.4	18.1	54.2	32245	25	19		38.8	37.9		0.335	0.294	0.283	1159	3.5	8.2	73.5	5/31	7/27	9/30
CV%	2.5	2.3	1.0	4.5	41	26		4.5	2.8		3.2	4.1	3.1	48	2.8	1.9	0.4	0.0	0.0	0.0
LSD.05	7.6	0.6	0.8	2220	16	8		2.7	1.7		0.016	0.018	0.013	861	NS	0.2	0.4	0.3	1	3

¹Yield adjusted to 15.5% moisture.
²45 lb N /ac of planting N applied as dribble treatment to the side of the row.
³65 lb N/ac with pre-planting strip-till and or at planting. The remainder N sidedressed on June 24, except for the 25 lb N/ac rate which was all applied pre planting strip-till and planting.
⁴Corn @$5.00/bu, N @ $.50/lb.
Planting Date = May 17; Harvest Date = October 6; Previous Crop = Corn.
Fertilizer Rate lbs/acre = N see table, 40 P₂O₅, 157 K₂O; 21 S; Irrigation = 8.9 inches.

Detailed material and methods					Other corn Studies 2011
					Corn hybrid performance trial dry land
Oakes Irrigation Research Site					Corn hybrid performance trial irrigated
Home page		Report 2011			Corn late planting date and relative maturity study
					Corn row width and hybrid study
					Stover removal corn corn rotation
					Stover removal corn soybean rotation
					Strip-tilled corn N rate soybean rotation