Oakes Irrigation Research
Site
Carrington Research Extension Center * North Dakota State University
P.O. Box 531, Oakes, ND 58474-0531, Voice: (701) 742-2189, FAX: (701)
742-2700, email: rgreenla@ndsuext.nodak.edu
'SUPERSWEET' SWEET CORN HYBRID PERFORMANCE TRIAL, 1997
Richard Greenland, Leonard Besemann, and Heidi KerlinSweet corn grows very well in this area of North Dakota. The short summer is compensated for by long days and lots of sunshine. Sweet corn always matures before frost.
Table 14. Corn development, ear height and ear removal score.
Table 15. Number of ears per acre and yield of sweet corn.
Table 16. Ear characteristics of sh2 sweet corn.
Go to Oakes Irrigation Research Site Variety Performance Trials
MATERIALS AND METHODS
| Soil: | Maddock sandy loam; pH=7.5; 2.9% organic matter; soil-P was high; soil-K was very high; soil-S was very low. |
| Previous crops: | 1996 - onion; 1995 - soybean; 1994 - carrot. |
| Seedbed preparation: | Field was plowed May 7. Multiweeded (field cultivated) twice on June 9. |
| Planting: | Seeded on June 9 in 30-inch rows. Planting depth was about 3/4 inch. Plots were seeded at a rate of 50,000 seeds/acre, then later thinned to 28,000 plants/acre. |
| Plots: | Plots were 5 rows (12.5 ft) wide by 17 ft long. There were 4 reps. |
| Fertilizer: | On April 23, broadcast 14 lbs N/acre and 70 lbs P2O5/acre as 10-50-0, 16 lbs N/acre and 19 lbs S/acre as 21-0-0-24, and 94 lbs K20/acre as 0-0-60. Fertigated 52 lbs N/acre as 28-0-0 on July 11. Sprayed 50 lbs N/acre as 28-0-0 on July 22. |
| Irrigation: | Overhead sprinkler irrigation as needed. |
| Pest Control: | Dual and Bladex (1.5 pt/acre and 1 lb/acre applied on June 13) controlled weeds. Sprayed Dipel (1 lb/acre on July 15) to control European corn borer and corn earworm. |
| Harvest: | Hand harvested 23 to 25 days after half-silk date. Only the center row of each plot was harvested. Harvested from Aug 20 to Sept 2. |
Zenith, HMX5377S, HMX5375S, and SweetEar were the highest yielding hybrids and also looked good.
Return to top of sweet corn variety trial.
Table 14. Corn development, ear height and ear removal score for sweet corn in the Oakes Irrigation Research Station 1997 'supersweet' sweet corn performance trial.
| Hybrid | Seed source† | Early stand‡ | Early vigor | Days to half-silk | Days to harvest | Ear height§ | Ear removal¶ |
| 1000s/acre | 1 to 10 | inches | 1 to 10 | ||||
| Bi-Time | RG | 26.1 | 9.8 | 56.0 | 79.3 | 31.5 | 6.8 |
| Doblete | FM | 22.8 | 4.5 | 56.0 | 79.5 | 27.3 | 6.5 |
| Double Dots | FM | 23.8 | 8.0 | 55.8 | 78.5 | 28.3 | 6.5 |
| Fantasy | FM | 25.9 | 9.5 | 51.0 | 74.8 | 20.3 | 5.5 |
| HM 701 | HM | 22.0 | 9.0 | 52.8 | 74.0 | 23.3 | 4.8 |
| Impulse | RG | 27.5 | 9.0 | 51.8 | 74.0 | 26.5 | 6.4 |
| Prime Plus | RG | 24.6 | 9.5 | 55.8 | 80.3 | 31.3 | 5.8 |
| Primetime | RG | 20.0 | 9.0 | 56.0 | 79.0 | 30.0 | 6.0 |
| Punchline | AS | 24.3 | 9.0 | 56.3 | 79.8 | 29.8 | 6.5 |
| Quest | RG | 24.6 | 8.5 | 57.8 | 83.0 | 28.3 | 6.3 |
| Sheba | AS | 21.0 | 9.3 | 50.8 | 75.0 | 25.5 | 6.3 |
| Snowmass | RG | 25.4 | 8.0 | 57.8 | 81.0 | 25.0 | 7.0 |
| Colossal | ST | 21.0 | 6.5 | 49.0 | 72.0 | 22.0 | 5.3 |
| Sweetear | FM | 21.8 | 7.8 | 55.0 | 77.5 | 26.3 | 7.5 |
| Vail | RG | 25.4 | 8.8 | 57.0 | 81.0 | 33.0 | 7.3 |
| Victor | FM | 20.8 | 7.3 | 57.5 | 81.0 | 29.8 | 8.8 |
| Zenith | HM | 28.7 | 8.3 | 57.5 | 81.0 | 32.0 | 5.8 |
| HMX5377S | HM | 24.6 | 8.0 | 59.0 | 85.0 | 28.0 | 5.3 |
| HMX5375S | HM | 22.5 | 9.5 | 57.5 | 81.0 | 32.3 | 5.3 |
| FMX 355 | FM | 23.3 | 9.0 | 57.8 | 81.0 | 33.0 | 3.5 |
| LSD(0.05) | NS | 1.3 | 0.9 | 1.4 | 2.7 | 1.2 | |
| C.V.(%) | 20 | 11 | 1 | 1 | 7 | 14 | |
†See appendix A for seed source
codes.
‡Corn was over planted. After stand count, corn was thinned
to about 28,000 plants/acre (unless there were fewer than 28,000 plants that
emerged).
§Distance from ground to base of ear.
¶Indicates ease of ear removal. The higher the score, the
easier it was to remove the ear.
Return to top of sweet corn variety trial.
Table 15. Number of ears per acre and yield of sweet corn in the Oakes Irrigation Research Station 1997 'supersweet' sweet corn performance trial.
Hybrid |
Seed source† | Unhusked | Husked | ||||||
| marketable | total | marketable | total | ||||||
| ears | yield | ears | yield | ears | yield | ears | yield | ||
| 1000s/A | tons/A | 1000s/A | tons/A | 1000s/A | tons/A | 1000s/A | tons/A | ||
| Bi-Time | RG | 16.7 | 5.2 | 23.1 de | 6.2 ef | 14.6 b-e | 2.7 def | 22.3 de | 3.7 fg |
| Doblete | FM | 16.1 | 5.4 | 22.8 de | 6.5 def | 12.0 def | 2.7 def | 22.8 de | 4.0 efg |
| Double Dots | FM | 17.2 | 6.5 | 24.3 b-e | 7.7 b-e | 11.8 ef | 2.9 c-f | 24.3 b-e | 4.6 b-g |
| Fantasy | FM | 15.6 | 4.7 | 26.1 b-e | 6.7 def | 12.3 c-f | 2.5 ef | 26.1 b-e | 4.4 c-g |
| HM 701 | HM | 18.7 | 6.5 | 25.9 b-e | 7.8 b-e | 11.5 ef | 2.5 ef | 25.9 b-e | 4.4 c-g |
| Impulse | RG | 21.0 | 6.7 | 28.1 a-d | 8.1 b-e | 15.5 b-e | 3.3 a-e | 27.5 a-e | 4.8 a-f |
| Prime Plus | RG | 18.4 | 5.5 | 26.9 a-e | 6.9 def | 15.1 b-e | 2.9 c-f | 26.9 a-e | 4.0 efg |
| Primetime | RG | 17.7 | 5.7 | 27.4 a-d | 7.4 cde | 13.6 cde | 2.8 def | 27.4 a-d | 4.2 d-g |
| Punchline | AS | 18.7 | 6.2 | 25.1 b-e | 7.4 cde | 17.2 abc | 3.4 a-e | 25.1 b-e | 4.3 c-g |
| Quest | RG | 20.8 | 7.2 | 25.6 b-e | 8.1 b-e | 16.9 a-d | 4.2 ab | 25.6 b-e | 5.3 a-d |
| Sheba | AS | 17.4 | 5.7 | 29.5 abc | 7.9 b-e | 14.6 b-e | 3.2 b-e | 29.5 ab | 5.1 a-d |
| Snowmass | RG | 21.5 | 8.2 | 27.2 a-e | 9.2 abc | 15.9 b-e | 3.6 a-e | 27.2 a-d | 4.9 a-f |
| Colossal | ST | 13.6 | 4.0 | 21.3 e | 5.4 f | 8.5 f | 1.8 f | 21.3 e | 3.5 g |
| Sweetear | FM | 19.7 | 7.8 | 28.4 a-d | 9.5 ab | 13.8 cde | 3.8 a-d | 29.2 abc | 6.0 a |
| Vail | RG | 16.1 | 5.2 | 23.6 cde | 6.6 def | 12.6 c-f | 2.6 ef | 23.6 cde | 3.9 efg |
| Victor | FM | 19.2 | 7.4 | 23.3 de | 8.1 bcd | 13.8 cde | 4.0 abc | 23.3 de | 5.4 abc |
| Zenith | HM | 27.9 | 9.3 | 32.8 a | 10.2 a | 21.8 a | 4.4 a | 32.5 a | 5.8 a |
| HMX5377S | HM | 26.1 | 9.7 | 30.0 ab | 10.6 a | 19.0 ab | 4.3 ab | 30.0 ab | 5.8 a |
| HMX5375S | HM | 25.9 | 8.3 | 32.5 a | 9.5 ab | 21.5 a | 4.4 a | 32.5 a | 5.7 ab |
| FMX 355 | FM | 18.2 | 7.0 | 23.1 de | 8.0 b-e | 15.4 b-e | 4.0 abc | 22.8 de | 5.0 a-e |
| LSD(0.05) | 5.5 | 1.9 | ‡ | ‡ | ‡ | ‡ | ‡ | ‡ | |
| C.V.(%) | 20 | 20 | 16 | 17 | 24 | 24 | 16 | 17 | |
†See appendix A for seed source.
‡Values in the same column followed by the same letter are
not significantly different at the 0.05 level.
Return to top of sweet corn variety trial.
Table 16. Ear characteristics of sweet corn in the Oakes Irrigation Research Station 1997 'supersweet' sweet corn performance trial.
Hybrid |
Seed† source |
Color | Distance husk over tip‡ | Husk tight- ness§ | Husk overall score | Ear length | Ear dia. | Rows of kernels | Tip¶ unfilled |
Tip†† shape | Kernel‡‡ yellow intensity | Ear overall score |
| inches | 1 to 3 | 1 to 10 | -- inches -- | inches | 1 to 3 | 1 to10 | ||||||
| Bi-Time | RG | bi | 1.3 | 2.0 | 5.6 | 7.4 | 1.65 | 15 | 0.0 | 1.3 | 1.0 | 6.5 |
| Doblete | FM | bi | 2.7 | 2.4 | 6.5 | 7.4 | 1.79 | 18 | 0.2 | 1.0 | 1.3 | 7.0 |
| DoubleDots | FM | bi | 2.4 | 2.3 | 6.1 | 8.0 | 1.75 | 17 | 0.1 | 1.3 | 1.5 | 7.5 |
| Fantasy | FM | bi | 1.5 | 1.6 | 4.5 | 7.1 | 1.76 | 16 | 0.1 | 1.5 | 1.0 | 6.4 |
| HM 701 | HM | y | 1.2 | 2.1 | 5.6 | 7.6 | 1.65 | 16 | 0.1 | 1.0 | 1.3 | 5.9 |
| Impulse | RG | y | 1.6 | 1.5 | 5.0 | 7.0 | 1.68 | 14 | 0.2 | 1.0 | 1.3 | 6.4 |
| Prime Plus | RG | y | 1.5 | 2.0 | 5.3 | 7.1 | 1.65 | 17 | 0.0 | 1.3 | 2.0 | 6.5 |
| Primetime | RG | y | 1.4 | 2.0 | 5.8 | 7.4 | 1.65 | 16 | 0.0 | 1.0 | 2.0 | 6.3 |
| Punchline | AS | y | 1.5 | 2.3 | 5.8 | 7.2 | 1.74 | 17 | 0.0 | 1.0 | 2.0 | 6.9 |
| Quest | RG | bi | 0.9 | 1.4 | 4.5 | 7.2 | 1.91 | 16 | 0.5 | 1.4 | 1.5 | 6.8 |
| Sheba | AS | y | 1.5 | 2.1 | 6.3 | 7.9 | 1.74 | 14 | 1.0 | 1.0 | 2.0 | 6.8 |
| Snowmass | RG | w | 2.2 | 2.1 | 6.3 | 7.4 | 1.78 | 18 | 0.0 | 1.3 | - | 7.4 |
| Colossal | ST | bi | 2.7 | 1.8 | 5.8 | 5.9 | 1.78 | 16 | 0.6 | 1.6 | 1.0 | 5.5 |
| Sweetear | FM | y | 2.4 | 1.8 | 5.8 | 8.2 | 1.88 | 16 | 0.1 | 2.0 | 2.0 | 7.5 |
| Vail | RG | w | 0.8 | 1.9 | 4.8 | 7.2 | 1.81 | 18 | 0.0 | 1.3 | - | 7.5 |
| Victor | FM | y | 1.9 | 2.3 | 6.3 | 8.0 | 1.92 | 20 | 0.8 | 1.0 | 2.0 | 7.1 |
| Zenith | HM | y | 2.3 | 2.6 | 7.0 | 7.1 | 1.73 | 17 | 0.0 | 1.0 | 1.8 | 6.9 |
| HMX5377S | HM | y | 3.2 | 2.4 | 6.5 | 7.8 | 1.67 | 19 | 0.0 | 1.0 | 2.0 | 6.5 |
| HMX5375S | HM | y | 2.3 | 2.1 | 6.1 | 7.2 | 1.66 | 17 | 0.0 | 1.0 | 2.0 | 7.0 |
| FMX 355 | FM | bi | 1.4 | 1.9 | 5.3 | 7.8 | 1.94 | 18 | 0.0 | 1.3 | 1.3 | 7.6 |
| LSD (0.05) | 2 | 0.5 | 1.1 | 0.6 | 0.12 | 2 | 0.2 | 0.5 | 0.5 | 0.8 | ||
| C.V. (%) | 31 | 16 | 13 | 6 | 5 | 10 | 85 | 27 | 21 | 8 | ||
†See appendix A for seed source
codes.
‡The distance the husk extends beyond the end of the ear.
§How tight husk is around ear. 1 = loose; 3 = tight.
¶Length of unfilled ear tip.
††Tip shape: 1 is pointed; 2 is blunt; 3 is double or
flat.
‡‡Gives darkness of yellow kernels on ear. 1 = light
yellow; 2 = medium yellow; 3 = dark yellow.
Return to top of sweet corn variety trial.
Go to Oakes Irrigation Research Site Variety Performance Trials
Go to Oakes Irrigation Research Site 1997 annual report