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
The Response of Three Potato Cultivars to Nitrogen Rate - 2011
Table 1.  Russet Burbank        
                  Soil Nitrate N $ Return Over
Fertilizer Specific Hollow Brown  Chlorophyll Meter NDRE Value - Holland Sensor Petiole Sap Nitrate-N Dry Petiole Nitrate--N 6-Aug 6-Aug 120 lb/ac N rate3
N Rate 0-4 oz 4-6 oz 6-12 oz >12 oz Total 2's Culls Gravity Heart Center 13-Jul 21-Jul 10-Aug 22-Aug   7/14 7/22 8/8 8/18   18-Jul 3-Aug 24-Aug   18-Jul 3-Aug 24-Aug 0-12" 0-24" 2011 1 2010 2
lb/ac ----------------------------------cwt/ac------------------------------------ # # ------------------------------ppm----------------------------  
120 108 107 100 7 346 24 25 1.083 1.5 0.0 38 36 14 13   0.261 0.266 0.242 0.202   1028 738 1405   6895 2550 1938 13 7 0 0
180 81 99 112 11 338 36 34 1.091 1.8 0.0 37 37 20 17   0.259 0.286 0.296 0.275   1850 1525 1335   15202 9073 3281 8.5 7 -12 901
240 86 93 137 13 374 45 28 1.089 1.8 0.0 38 38 20 20   0.240 0.298 0.312 0.306   1825 1975 2075   16169 15927 7113 13.5 7 291 569
300 69 99 135 19 368 47 46 1.086 2.0 0.0 39 40 22 21   0.267 0.299 0.325 0.325   2050 2000 2150   23196 17782 8757 11.5 8.5 339 843
Mean 86 99 121 12 356 38 33 1.087 1.8 0.0 38 38 19 18   0.257 0.287 0.294 0.277   1688 1559 1741   15366 11333 5272 12 7 154  
CV% 13.1 11.2 16.1 11.5 8.0 39.4 30.6 0.5 91.4 0.0 2.2 3.1 6.7 12.6 6.5 5.6 5.5 7.5 10.7 16.9 23.4 35.15 24.02 190.1
LSD.05 18 NS NS NS NS NS NS NS NS NS 1 2 2 4   0.027 0.026 0.026 0.033   290 422 652         NS NS NS  
Table 2.  Bannock Russet    
  Soil Nitrate N $ Return Over
Fertilizer Specific Hollow Brown  Chlorophyll Meter NDRE Value - Holland Sensor Petiole Sap Nitrate-N Dry Petiole Nitrate--N 6-Aug 6-Aug 120 lb/ac N rate3
N Rate 0-4 oz 4-6 oz 6-12 oz >12 oz Total 2's Culls Gravity Heart Center 13-Jul 21-Jul 10-Aug 22-Aug   7/14 7/22 8/8 8/18   18-Jul 3-Aug 24-Aug   18-Jul 3-Aug 24-Aug 0-12" 0-24" 2011 1 2010 2
lb/ac ----------------------------------cwt/ac------------------------------------ # # ------------------------------ppm----------------------------  
120 54 105 171 13 356 13 11 1.099 1.3 0.0 37.0 36.3 15.6 14.0   0.269 0.244 0.265 0.245   985 670 948   6976 2473 348 7 4 0 0
180 52 91 194 32 383 15 13 1.095 1.8 0.0 38.3 37.5 19.5 16.8   0.269 0.274 0.322 0.323   1650 1550 1843   15121 9234 1411 6 6 349 -103
240 39 75 184 44 362 21 10 1.093 2.8 0.0 40.1 37.9 21.3 19.7   0.267 0.297 0.331 0.335   1700 1875 2225   17702 14637 3036 7 4 133 -141
300 35 70 185 50 362 23 15 1.083 3.5 0.0 39.0 38.7 22.3 21.2   0.273 0.312 0.354 0.355   1800 2000 2150   20260 17782 5717 9 5 130 -49
Mean 45 85 184 35 366 18 12 1.093 2.4 0.0 38.6 37.6 19.7 17.9   0.269 0.282 0.318 0.314   1534 1524 1791   15015 11032 2628 7 5 153  
CV% 20.8 15.4 14.1 63.8 7.5 36.0 49.5 0.4 62.1 0.0 3.1 2.3 8.8 5.0 5.2 2.1 3.1 5.7 11.8 22.6 40.9 46.9 249.5
LSD.05 15 21 NS NS NS NS NS 0.008 NS NS 1.9 1.4 2.1 2.5   NS 0.023 0.011 0.016   139 287 646         NS NS NS  
Table 3.  Dakota Trailblazer    
  Soil Nitrate N $ Return Over
Fertilizer Specific Hollow Brown  Chlorophyll Meter NDRE Value - Holland Sensor Petiole Sap Nitrate-N Dry Petiole Nitrate--N 6-Aug 6-Aug 120 lb/ac N rate3
N Rate 0-4 oz 4-6 oz 6-12 oz >12 oz Total 2's Culls Gravity Heart Center 13-Jul 21-Jul 10-Aug 22-Aug   7/14 7/22 8/8 8/18   18-Jul 3-Aug 24-Aug   18-Jul 3-Aug 24-Aug 0-12" 0-24" 2011 1 2010 2
lb/ac ----------------------------------cwt/ac------------------------------------ # # ------------------------------ppm----------------------------  
120 35 104 198 13 358 10 9 1.123 0.5 0.0 36 35 13 11   0.246 0.242 0.245 0.221   953 400 723   6331 1238 331 6 5 0 0
180 24 67 251 43 405 20 11 1.114 2.5 0.0 38 38 19 16   0.256 0.278 0.289 0.275   1875 1058 1283   21435 5174 2329 8 5 576 449
240 26 60 225 54 380 16 17 1.111 3.3 0.0 38 39 21 19   0.266 0.289 0.307 0.298   1825 1925 1525   20596 12218 1472 8 5 294 535
300 21 64 237 62 406 21 10 1.107 4.5 0.0 39 40 23 22   0.263 0.293 0.320 0.317   1875 2025 2100   23784 13024 3112 7 6 600 889
Mean 26 74 228 43 387 16 11 1.113 2.7 0.0 38 38 19 17   0.258 0.275 0.290 0.278   1632 1352 1408   18037 7914 1811 7 5 368 468
CV% 25.4 21.2 12.2 35.1 8.2 44.2 52.7 0.5 76.5 0.0 1.3 2.2 7.1 9.5 7.3 2.8 2.3 4.1 8.2 11.1 33.6 24.9 29.8 249.5
LSD.05 NS 25 NS 24 NS NS NS 0.010 NS NS 1 1 2 3   NS 0.012 0.011 0.018   214 240 756         NS NS NS  
1 Previous crop soybean.
2 Previous crop corn.
3 0-4 oz ($5.00/cwt); 4-6 oz ($14.50/cwt); 6-12 oz ($12.00/cwt); > 12 oz ($16.00/cwt).
Planting Date = May 6; Harvest Date = October 4; Previous Crop = Soybean.
Fertilizer Rate lb/acre =  N see table, 39 P2O5, 48 K2O, 19 S, 2 Zn; Irrigation = 10.3 inches.
Table 4.  Fungicide treatments Table 5. Nitrogen treatments
Detailed material and methods
Oakes Irrigation Research Site 
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