| Rabid | Dark Northern Spring Wheat. |
| Rabboni | Northern Spring Wheat. |
| Raccoon | Red Spring Wheat. |
| Racket | Red Spring Humpback Wheat. |
| Radiator | Amber Durum Wheat. |
| Radium | Durum Wheat. |
| Rafter | Red Durum Wheat. |
| Rafting | Dark Hard Winter Wheat. |
| Raftsman | Hard Winter Wheat. |
| Rally | Yellow Hard Winter Wheat. |
| Ramify | Red Winter Wheat. |
| Rampage | Red Walla Wheat. |
| Ramrod | Soft Red Wheat. |
| Ramus | Hard White Wheat. |
| Rascality | Soft White Wheat. |
| Rattler | White Club Wheat. |
| Raven | Sample Wheat. |
| Ravenous | Mixed Wheat. |
| Readiness | Smutty Wheat. |
| Realism | Treated Wheat. |
| Reality | Percentage of Moisture. |
| Reap | Number 1. |
| Reaped | Number 2. |
| Reaping | Number 3. |
| Reasoning | Number 4. |
| Rebuttal | Number 5. |
| Recant | Number 2 or better. |
| Reception | Number 3 or better. |
| Recess | Number 4 or better. |
| Recital | As good as number 2. |
| Recite | As good as number 3. |
| Reckoning | As good as number 4. |
| Reclaim | . . . . . . |
| Recluse | . . . . . . |
| Recollect | . . . . . . |