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
Dryland cropping sequence at Ayr, ND  2008
Go to corn on soybean
Go to corn on wheat
Strip-Till, Corn on Corn, Nitrogen Rate Study (Dryland)
Fertilizer Grain Harvest Test Ears/ Fall Nitrate-N Chloropyll1
N Rate Yield Moisture Weight Plant 2007 2008 Reading Population
lb/ac bu/ac % lb/bu 0-24" 0-24" plants/ac
11 120.1 30.5 50.7 0.97 84 36 46 27552
50 96.9 31.6 49.4 0.97 36 14 52 28097
100 112.9 29.9 51.6 1.02 40 21 56 25591
150 139.3 29.9 52.0 1.00 41 37 57 27661
Mean 117.3 30.5 50.9 0.99 50 27 53 27225
LSD.05 17.4 NS NS 0.03 NS NS 3.5 1541
C.V.% 11.5 5.8 2.7 1.8 85.5 71.4 4.2 3.5
Fertilizer Grain Grain Grain Stalk
N Rate Oil Protein Starch Nitrate-N
lb/ac % % % ppm
11 3.4 7.5 72.5 806
50 3.6 7.2 72.5 568
100 3.4 7.4 71.3 444
150 3.2 7.9 72.0 747
Mean 3.4 7.5 72.1 642
LSD.05 0.3 NS NS 950
C.V.% 4.8 7.6 1.3 92
1 Chlorophyll reading taken on 8/14/2008
Planting Date = May 7; Harvest Date = November 5; Previous Crop = Corn
Fertilizer Rate lb/ac: P2O5 = 36;
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Strip-Till, Corn on Soybean, Nitrogen Rate Study (Dryland)
Fertilizer Grain Harvest Test Ears/ Fall Nitrate-N (0-24") Chlorophyll2
N Rate Yield Moisture Weight Plant 20071 2008 Reading Population
lb/ac bu/ac % lb/bu lb/ac lb/ac plants/ac
11 157.6 28.7 52.8 1.00 37 16 56.0 29512
50 174.6 27.9 53.5 0.99 37 13 59.0 29730
100 185.4 27.7 54.4 1.00 37 33 60.6 28968
150 189.6 27.8 53.9 1.00 37 38 61.2 30492
 Mean 176.8 28.0 53.7 1.00 -- 25 59.2 29675
LSD.05 9.6 NS 0.7 NS -- 15 3 NS
CV% 3.4 1.9 0.8 2.18 -- 37 3 3
Fertilizer Grain Grain Grain Stalk
N Rate Oil Protein Starch Nitrate-N
lb/ac % % % ppm
11 3.2 6.9 72.1 341
50 3.2 7.3 71.7 203
100 3.2 7.8 71.5 1026
150 3.3 8.1 71.1 1823
 Mean 3.2 7.5 71.6 848
LSD.05 NS 0.2 0.6 755
CV% 4.2 2.1 0.5 56
1 Composite soil sample from entire soybean plot.
2 Chlorophyll reading taken on 8/14/2008
Planting Date = May 7; Harvest Date = November 5; Previous Crop = Soybean
Fertilizer Rate lb/ac: P2O5 = 36;
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Strip-Till, Corn on Wheat, Nitrogen Rate Study (Dryland)
Fertilizer Grain Harvest Test Ears/ Fall Nitrate-N (0-24") Chlorophyll2
N Rate Yield Moisture Weight Plant 20071 2008.0 Reading Population
lb/ac bu/ac % lb/bu lb/ac lb/ac plants/ac
10 160.0 28.7 54.1 1.00 26 7.0 55.3 28205
50 171.1 26.7 54.6 1.01 26 9.0 58.6 26789
100 174.3 26.2 55.4 1.00 26 14.0 60.2 26136
150 182.6 26.3 55.6 1.00 26 21.0 60.6 27770
Mean 172.0 27.0 54.9 1.00 -- 12.8 58.7 27225
LSD.05 NS 1.8 0.8 NS -- 6.1 3.8 NS
CV% 6.6 4.3 0.9 1.59 -- 29.7 4.1 6.0
         
Fertilizer Grain Grain Grain Stalk
N Rate Oil Protein Starch Nitrate-N
lb/ac % % % ppm
10 3.3 7.0 71.1 271
50 3.3 7.2 70.8 394
100 3.2 7.7 70.9 966
150 3.1 7.9 70.7 2142
Mean 3.2 7.4 70.9 943
LSD.05 NS 0.6 NS 1175
CV% 6.0 5.1 0.6 78
1 Composite soil sample from entire wheat plot.
2 Chlorophyll reading taken on 8/14/2008
Planting Date = May 7; Harvest Date = November 5; Previous Crop = Wheat
Fertilizer Rate lb/ac: P2O5 = 36;
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Go to detailed material and methods
Go to Oakes Irrigation Research Site Variety Performance Trials
Go to Oakes Irrigation Research Site crop index
Go to Oakes Irrigation Reseach Site 2008 Annual Report
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