| Variety | Total | Total | Total | Total | Total | Relative Yield | % Stand |
| 2004 | 2003 | 2002 | 2001 | 2002-04 | 2002-04 | 9/30/04 | |
| WL 342 | 7.65 | 8.31 | 6.55 | 2.39 | 22.67 | 106 | 78 |
| Starbuck | 7.49 | 8.11 | 6.79 | 2.38 | 22.32 | 105 | 75 |
| A 30-06 | 7.26 | 7.87 | 6.41 | 2.48 | 21.68 | 102 | 74 |
| DKA 42-15 | 6.99 | 8.01 | 6.79 | 2.26 | 21.64 | 101 | 73 |
| Ameristand 403T | 7.20 | 7.90 | 6.45 | 2.48 | 21.64 | 101 | 77 |
| 6420 | 6.85 | 7.76 | 6.59 | 2.51 | 21.38 | 100 | 74 |
| 54V54 | 6.66 | 8.13 | 6.60 | 2.33 | 21.21 | 99 | 72 |
| Phirst | 6.98 | 7.81 | 6.42 | 2.35 | 21.18 | 99 | 75 |
| HybriForce-400 | 6.56 | 8.23 | 6.46 | 2.36 | 21.05 | 99 | 72 |
| 54H91 | 7.13 | 7.81 | 5.90 | 2.33 | 20.79 | 97 | 73 |
| FK 421 | 6.81 | 7.57 | 6.13 | 2.20 | 20.54 | 96 | 72 |
| Vernal | 6.59 | 7.01 | 6.22 | 2.32 | 19.90 | 93 | 68 |
| Mean | 7.01 | 7.88 | 6.44 | 2.37 | 21.33 | 74 | |
| LSD (0.05) | 0.53 | 0.36 | 0.42 | 0.12 | 0.78 | 4.60 | |
| CV % | 5.24 | 3.22 | 4.59 | 3.60 | 2.53 | 4.30 | |
| Data subjected to Nearest Neighbor AOV, adjusted means reported. | |||||||
| Establishment: | Seeded with a Hege 3-point hitch drill with presswheels at 16 lb/a. Eptam applied PPI at 2qt/a. 3 ton/a of lime applied fall 2000 prior to seeding. | ||||||
| Plot size: | 5' x 25', 25' alleys and borders. RCBD with four reps. | ||||||
| Soil type and analysis: | Hoytville silty clay, pH=6.9, P=61 lb/a, K=376 lb/a, CEC= 17, O.M.=3.3 (10/03). | ||||||
| 2004 Fertilization: | No fertilization was required. | ||||||
| 2004 Pest control: | Insecticide was apllied on 21-June, 24-July and 1-August for potato leafhopper control. | ||||||