Pottawattamie County
| Trial ID | Trial Type | Trial Detail |
| ST2009227A | Population | Population on Corn |
| ST2009183A | Nitrogen | Expanded Manure |
| ST2009184A | Nitrogen | Expanded Manure |

| Trial ID | Trial Type | Trial Detail |
| ST2009227A | Population | Population on Corn |
| ST2009183A | Nitrogen | Expanded Manure |
| ST2009184A | Nitrogen | Expanded Manure |
