Case history of a very chlorotic pin oak growing In a poorly drained heavy clay soil where part of the runoff water onto the site was from a limestone driveway. Tree treated with 96% granular sulfur, 10 pounds per 100 sq. ft. on 5-5-75 and 6 pounds per 100 sq. ft. on 6-17-76 and 6-12-78.
| Parts/million available | ||||
|---|---|---|---|---|
| Date and depth | pH | Iron | Manganese | Zinc |
| 10-10-74 | ||||
| 0-3” depth | 7.9 | 3.5 | 8.7 | 12 |
| 6-14-76 | ||||
| 0-3” depth | 7.7 | 21 | 9.1 | 10 |
| 6-7-79 | ||||
| 0-3” depth | 7.5 | 66 | 16 | 10 |
| 5-17-85 | ||||
| 0-1.5” depth | 5.6 | 332 | 20 | 11 |
| 1.5-3” depth | 7.2 | 226 | 58 | 21 |