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 - 2012
Table 1.  Bannock Russet
                                        $ Return Over
Fertilizer Specific Hollow Brown  Chlorophyll Meter NDRE Value - Holland Sensor Dry Petiole NO_3-N Petiole Sap NO_3-N 120 lb/ac N rate
N Rate 0-4 oz 4-6 oz 6-12 oz >12 oz Total 2's Culls Gravity Heart Center 3-Aug 23-Aug   20-Jul 21-Aug   18-Jul 3-Aug 24-Aug 18-Jul 3-Aug  
lb/ac -------------------------------------------cwt/ac------------------------------------------- # # ----------------ppm-------------- ----------ppm---------- $
120 41 80 202 57 380 14 7       12 11   0.2936 0.1532   6976 2473 348   690 1053  
180 28 43 204 149 424 14 30       15 15   0.3271 0.2476   15121 9234 1411   1500 1745 $902
240 41 44 228 131 444 12 20       15 14   0.3157 0.2122   17702 14637 3036   895 1518 $964
300 31 41 179 132 383 23 18       19 18   0.3553 0.3015   20260 17782 5717   2100 2175 $315
Mean 35 52 203 117 408 16 19       15 14   0.3229 0.2286   15015 11032 2628   1296 1623 $727
CV% 32.4 23.6 17.4 370.0 9.1 33.0 79.1 9.0 9.3 4.8 28.8 17.1 26.1 10.36
LSD.05 NS 19.7 NS NS NS NS NS       2.2 2.1   NS NS           355 677 NS
Table 2.  Russet Burbank
                                        $ Return Over
Fertilizer Specific Hollow Brown  Chlorophyll Meter NDRE Value - Holland Sensor Dry Petiole NO_3-N Petiole Sap NO_3-N 120 lb/ac N rate
N Rate 0-4 oz 4-6 oz 6-12 oz >12 oz Total 2's Culls Gravity Heart Center 3-Aug 23-Aug   20-Jul 21-Aug   18-Jul 3-Aug 24-Aug   18-Jul 3-Aug  
lb/ac -------------------------------------------cwt/ac------------------------------------------- # # ----------------ppm-------------- ----------ppm---------- $
120 69 89 148 87 392 22 17       9.9 7.4   0.2644 0.1744   6895 2550 1938   918 808  
180 53 64 183 151 451 26 26       15.1 12.4   0.3171 0.2714   15202 9073 3281   775 1505 $1,009
240 47 67 207 137 457 26 28       13.1 12.5   0.3034 0.2509   16169 15927 7113   905 1158 $1,079
300 47 50 222 140 459 37 24       18.8 17.5   0.3393 0.3089   23196 17782 8757   1725 2350 $1,077
Mean 54 67 190 129 440 28 24       14 12   0.3060 0.2514   15366 11333 5272   1081 1455 $1,055
CV% 30.8 41.5 24.3 31.7 9.8 78.1 48.4 13.6 19.8 7.0 15.6 27.9 30.7 10.65
LSD.05 NS NS NS NS NS NS NS       3.1 3.9   0.03438 0.0626           482.0 714.0 NS
Table 3.  Dakota Trailblazer
                                        $ Return Over
Fertilizer Specific Hollow Brown  Chlorophyll Meter NDRE Value - Holland Sensor Dry Petiole NO_3-N Petiole Sap NO_3-N 120 lb/ac N rate
N Rate 0-4 oz 4-6 oz 6-12 oz >12 oz Total 2's Culls Gravity Heart Center 3-Aug 23-Aug   20-Jul 21-Aug   18-Jul 3-Aug 24-Aug   18-Jul 3-Aug  
lb/ac -------------------------------------------cwt/ac------------------------------------------- # # ----------------ppm-------------- ----------ppm---------- $
120 27 57 226 102 412 6 6       10.0 7.7   0.2651 0.1238   6331 1238 331   1125 1345  
180 24 42 218 203 488 6 12       14.4 13.9   0.3023 0.2990   21435 5174 2329   1600 1620 $1,294
240 25 31 183 221 459 12 12       12.9 13.4   0.2885 0.2229   20596 12218 1472   1700 1510 $993
300 28 28 219 198 472 18 10       20.2 18.9   0.3277 0.3167   23784 13024 3112   2000 2225 $1,029
Mean 26 39 212 181 458 10 10       14 14   0.2959 0.2406   18037 7914 1811   1606 1675 $1,105
CV% 26.0 32.1 106.0 26.3 8.5 96.7 83.3 11.1 14.9 4.4 15.2 23.0 30.2 9.9
LSD.05 NS 20.2 NS 76.1 NS NS NS       2.6 3.2   0.021 0.0600           590 NS NS
Table 4.   Fungicide treatments Table 5.  Nitrogen treatments
Detailed material and methods
Oakes Irrigation Research Site
Variety trials Crop index Home page Report 2012