Field operation. Soil residues of picloram after application of 1% Tordon 101 with a hydraulic spray truck. Data in ppm are the means of two layers. Each composite sample consisted of 5 cores representing an area of 9 sq. ft. Targets A and B were 20 feet apart.
| Layer in | 7/26/83 | 8/2/83 | 8/10/83 | 8/17/83 | 8/24/83 | 9/29/83 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | A | B | A | B | A | B | A | B | A | B | |
| 00-10 | 0.04 | 0.04 | 0.11 | 0.15 | 0.11 | 0.13 | 0.03 | 0.09 | 0.03 | 0.16 | 0.08 | 0.08 |
| 10-20 | N.D. | N.D. | 0.02 | N.D. | 0.01 | 0.01 | 0.03 | 0.05 | ||||
| 20-30 | 0.01 | 0.05 | ||||||||||