Comparison of mean nutrient content of sugar maple leaves by response to micro-nutrient treatment. (Rogers City, Ml) August 3,1972.
| No Response (Chlorotic) | Response (Green) | |
|---|---|---|
| % | ||
| P | .39 | .31 |
| Cu | 1.99 | 2.34 |
| Mg | .24 | .23 |
| ppm | ||
| Na | 151.1 | 170.5 |
| Mn | 2.1 | 17.9 |
| Fe | 35.2 | 28.3 |
| Cu | 9.8 | 7.7 |
| B | 57.7 | 71.2 |
| Zn | 20.7 | 16.8 |
| Al | 54.2 | 49.2 |