| Mat. | Mat. | |||||||
| Site No. | Location Names | State | Crop | Crop | Crop | <RM | <RM | Geographical Area |
| 2 | Mitchell | SD | Soys | 2.0 | South Eastern S. Dakota | |||
| 3 | Beresford | SD | Soys | 2.0 | South Eastern S. Dakota | |||
| 4 | Brookings | SD | Corn | Soys | 100 | 2.0 | South Eastern S. Dakota | |
| 5 | Jackson | MN | Soys | 2.5 | South West Minnesota | |||
| 7 | Mankato | MN | Corn | Soys | 2.0 | Mid Central Minnesota | ||
| 9 | Olivia | MN | Soys | 1.5 | North Central Minnesota | |||
| 10 | Reese | MI | Corn | Soys | 105 | 2.0 | North Central Michigan | |
| 11 | Fowler | MI | Corn | Soys | 105 | 2.0 | Mid Central Michigan | |
| 14 | Blissfield | MI | Corn | Soys | 110 | 2.5 | South Eastern Michigan | |
| 20 | Findlay | OH | Corn | Soys | 110 | 2.5 | North Western Ohio | |
| 21 | Greenville | OH | Corn | Soys | Wheat | 115 | 3.5 | West Central Ohio |
| 22 | St. Marys | OH | Soys | Wheat | West Central Ohio | |||
| 23 | Brookville | OH | Soys | Wheat | 4.0 | South Western Ohio | ||
| 25 | Tiffin | OH | Soys | Wheat | 3.0 | North Central Ohio | ||
| 27 | Archbold | OH | Corn | Soys | 110 | 2.5 | North Western Ohio | |
| 30 | Frankfort | IN | Corn | Soys | 115 | 3.5 | West Central Indiana | |
| 31 | Poneto | IN | Corn | Soys | 115 | 3.5 | North Eastern Indiana | |
| 32 | Windfall | IN | Corn | Soys | 115 | 3.5 | Mid Central Indiana | |
| 33 | Bluffton | IN | Corn | Soys | 115 | 3.5 | North Eastern Indiana | |
| 34 | Evansville | IN | Corn | Soys | 120 | 4.5 | South Western Indiana | |
| 35 | Wabash | IN | Corn | Soys | Wheat | 3.5 | North Central Indiana | |
| 36 | Marshall | IN | Corn | 115 | Mid Western Indiana | |||
| 37 | Remington | IN | Corn | Soys | 115 | 2.5 | North Western Indiana | |
| 38 | Greensburg | IN | Corn | Soys | Wheat | 115 | 4.0 | South Eastern Indiana |
| 39 | Atlanta | IN | Wheat | Mid Central Indiana | ||||
| 40 | Poseyville | IN | Wheat | South Western Indiana | ||||
| 41 | De Forest | WI | Soys | 2.5 | Mid Central Wisconsin | |||
| 42 | Janesville | WI | Corn | Soys | 110 | 2.5 | South Central Wisconsin | |
| 43 | Paris | IL | Corn | Soys | 115 | 4.0 | South Eastern Illinois | |
| 46 | Normal | IL | Corn | Soys | 115 | 3.5 | North Central Illinois | |
| 47 | Geneseo | IL | Corn | Soys | 115 | 3.0 | North Western Illinois | |
| 49 | Bloomington | IL | Corn | Soys | 115 | 3.5 | North Central Illinois | |
| 50 | Gilman | IL | Corn | Soys | 110 | 3.0 | Northern Eastern Illinois | |
| 51 | Rochelle | IL | Corn | 110 | Northern Central Illinois | |||
| 52 | Champaign | IL | Corn | Soys | 115 | 3.5 | East Central Illinois | |
| 53 | Springfield | IL | Corn | Soys | 115 | 3.5 | South Western Illinois | |
| 54 | Macomb | IL | Corn | Soys | 115 | 3.5 | West Central Illinois | |
| 55 | Mendota | IL | Corn | Soys | 110 | 3.0 | Northern Central Illinois | |
| 56 | Harrisburg | IL | Corn | Soys | Wheat | 115 | 4.0 | South Eastern Illinois |
| 57 | Mascoutah | IL | Corn | Soys | Wheat | 115 | 4.0 | South Western Illinois |
| 58 | Ridgway | IL | Corn | Soys | 120 | 4.0 | South Eastern Illinois | |
| 60 | Salem | IL | Corn | Soys | Wheat | 115 | 4.0 | South Central Illinois |
| 61 | Charleston | MO | Corn | Soys | Wheat | 120 | 4.0 | South Eastern Missouri |
| 62 | Maryville | MO | Soys | 4.0 | North Western Missouri | |||
| 63 | Columbia | MO | Soys | 4.0 | Mid Central Missouri | |||
| 64 | Carrollton | MO | Soys | 115 | 4.0 | Mid Central Missouri | ||
| 65 | Mexico | MO | Soys | Wheat | 4.0 | Mid Central Missouri | ||
| 67 | Hopkinsville | KY | Wheat | 115 | South Western Kentucky | |||
| 68 | Council Bluffs | IA | Corn | Soys | 115 | 3.5 | South Western Iowa | |
| 69 | Creston | IA | Corn | Soys | 115 | 3.5 | South Western Iowa | |
| 72 | Carroll | IA | Corn | Soys | 110 | 3.0 | Western Central Iowa | |
| 73 | Ames | IA | Corn | Soys | 110 | 3.0 | Mid Central Iowa | |
| 74 | Fort Dodge | IA | Corn | Soys | 110 | 3.0 | Mid Central Iowa | |
| 75 | Cedar Rapids | IA | Corn | Soys | 110 | 3.0 | Mid Central Iowa | |
| 78 | Eldora | IA | Corn | Soys | 110 | 3.0 | North Central Iowa | |
| 79 | Lake View | IA | Corn | Soys | 110 | 2.5 | North West Iowa | |
| 80 | Cash | AR | Wheat | East Central Arkansas | ||||
| 81 | Pine Bluff | AR | Wheat | East Central Arkansas | ||||
| 82 | Wynne | AR | Wheat | Eastern Arkansas | ||||
| 83 | Clarksdale | MS | Wheat | North Western Mississippi | ||||
| 91 | Beatrice | NE | Soys | 3.5 | South Eastern Nebraska | |||
| 92 | Stromsburg | NE | Soys | 3.5 | East Central Nebraska | |||
| 94 | Norfolk | NE | Soys | 3.5 | North Eastern Nebraska |