| No Image Available | Nutrient tests find bluegrass in quartz | 1932 | 10 |
| | Nutrient tests find bluegrass in quartz at University of Chicago | 1932 | 11 |
| | Nutrient tests find bluegrass in quartz at University - Chicago | 1932 | 12 |
| No Image Available | Nurtient tests find bluegrass in quartz | 1932 | 13 |
| | Nutrient tests find bluegrass in quartz | 1932 | 14 |
| | Nutrient test find bluegrass in quartz at University of Chicago | 1932 | 15 |
| No Image Available | Nutrient tests find bluegrass in quartz | 1932 | 16 |
| No Image Available | Nutrient tests find bluegrass in quartz | 1932 | 17 |
| No Image Available | Nutrient tests find bluegrass in quartz | 1932 | 18 |
| No Image Available | Buckhorn follows floodwater injury | 1932 | 19 |
| No Image Available | Buckhorn follows floodwater injury | 1932 | 20 |