| Total | Total | Relative Yield | |||||
| Variety | 7-Jun | 2-Jun | 2-Aug | 6-Sep | 2002 | 2001 | 2002 |
| Commercial Seed: | --------------------- Tons Dry Matter/Acre ------------------------ | % mean | |||||
| DKA 42-15 | 3.29 | 1.79 | 0.90 | 0.89 | 6.79 | 2.26 | 105 |
| Starbuck | 3.29 | 1.73 | 0.84 | 0.83 | 6.78 | 2.39 | 105 |
| 54V54 | 3.11 | 1.68 | 0.85 | 0.96 | 6.60 | 2.33 | 102 |
| 6420 | 3.31 | 1.52 | 0.85 | 0.92 | 6.59 | 2.50 | 102 |
| WL 342 | 3.20 | 1.64 | 0.84 | 0.87 | 6.55 | 2.39 | 102 |
| HybriForce-400 | 3.15 | 1.52 | 0.74 | 0.97 | 6.45 | 2.36 | 100 |
| Ameristand 403T | 3.32 | 1.62 | 0.74 | 0.76 | 6.45 | 2.48 | 100 |
| Phirst | 3.11 | 1.64 | 0.82 | 0.95 | 6.42 | 2.35 | 100 |
| A 30-06 | 3.15 | 1.64 | 0.80 | 0.85 | 6.41 | 2.48 | 99 |
| Vernal | 3.23 | 1.46 | 0.70 | 0.82 | 6.22 | 2.32 | 97 |
| FK 421 | 3.11 | 1.42 | 0.75 | 0.84 | 6.13 | 2.20 | 95 |
| 54H91 | 3.13 | 1.48 | 0.62 | 0.63 | 5.90 | 2.33 | 92 |
| Mean | 3.20 | 1.60 | 0.79 | 0.86 | 6.44 | 2.36 | -- |
| LSD 0.05 | ns | 0.14 | 0.10 | 0.10 | 0.42 | 0.12 | -- |
| CV % | 10.00 | 5.90 | 8.70 | 8.00 | 4.60 | 3.60 | -- |
| MCV | 14.37 | 8.51 | 12.47 | 11.59 | 6.59 | 5.17 | -- |
| LSR | 223.04 | 36.60 | 35.03 | 29.04 | 47.91 | 39.84 | -- |
| no. of harvest | -- | -- | -- | 4.00 | 2.00 | 6.00 | -- |
| Data subjected to Nearest Neighbor AOV, adjusted means reported. | |||||||
| Note: Stand was 95% for all varieties on 16-April-2002. | |||||||
| 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 = 6.7, P = 56 lb/a, K = 392 lb/a, CEC = 20, O.M. = 3.6 (10/02). | ||||||
| 2002 Fertilization: | No fertilization required. | ||||||
| 2002 Pest control: | Insecticide applied 21-June, 24-July and 16-August for potato leafhopper control. | ||||||