|  | 400 pounds of ammonium sulfide fertilizer resulted in no clover; 400 pounds of potassium fertilizer leaves clover (University of Wisconsin - Madison) | 1924 | 1 |
| No Image Available | Seed establisment with 1500 pounds of Milorganite and 500 pounds superphosphatei versus no fertilizer | 1924 | 2 |
|  | Seed establishment with 1500 pounds of Milorganite and 500 pounds of superphosphate vs none | 1924 | 3 |
