Color response of five sugar maple trees 50 days after treatment with various Sequestrene* chelated micronutrients. (Rogers City, Ml) 1972
| Treatment | Rate tsp/gal | June Av Color | August Av Color | Average Improvement |
|---|---|---|---|---|
| Mn | ½ | 5.6 | 8.6 | 3.0 |
| Zn | 1½ | 4.6 | 4.6 | 0.0 |
| Cu | ¾ | 3.8 | 3.8 | 0.0 |
| GA5-111 | 4 oz. | 5.0 | 7.4 | 2.4 |
| Fe330 | 1½ | 4.0 | 4.6 | .6 |
| Control | — | 3.8 | 3.8 | 0.0 |
| Mn(liquid) | 1½ | 4.8 | 7.2 | 2.4 |
| Mg | ½ | 4.6 | 4.2 | -0.4 |
| Mn | 1½ | 5.2 | 8.0 | 2.8 |
| Zn | 3 | 5.0 | 5.2 | 0.2 |
| Fe138 | ½ | 5.0 | 5.4 | 0.4 |
↵* Sequestrene is a registered Ciba-Geigy Corporation trade mark. Rates tested as suggested by manufacturer.