| | CystX | ® | Seed Resources Per State |
| | Monday, July 12, 2004 |
| | Iowa |
| | STATE: | IA | STATE: | IA |
| | Advantage Brand Soybean Seed / Knewtson Seed Co. | Sand Seed Service Inc dba Sands of Iowa |
| | Ag Source Seeds, Inc. | Seed Enterprises, Inc. |
| | Ag+ Seeds | SIEBEN HYBRIDS, INC. |
| | Ahrenholtz Seeds Inc. | Sucrosco Seed |
| | Albert Lea Seed House | Trelay Seed Co. |
| | CPS Seed | Vigoro Seed Division of Royster-Clark |
| | CROPLAN GENETICS | Ziller Seed Co. |
| | Dairyland Seed Co., Inc. |
| | Farm Advantage |
| | Frontier Seeds, Inc. |
| | FS Seeds (FS HiSoy®) |
| | FTE Genetics, Inc. |
| | Gold Country Seed |
| | Golden Harvest |
| | Golden Harvest / JC Robinson Seeds |
| | Horizon Genetics LLC |
| | Hubner Seed Co., Inc. |
| | Jung Seed Genetics, Inc. |
| | Kaup Seed Co. |
| | Latham Seed Co. |
| | Legend Seeds |
| | Lewis Hybrids |
| | MIDLAND GENETICS GROUP |
| | NC+ Hybrids |
| | Prairie Brand Seed Co. |
| | ProfiSeed |
| | Quality Plus Seed Company |
| | Renze Hybrids |
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