Element | Iron (Fe) | Manganese (Mn) | Zinc (Zn) | Copper (Cu) |
Extraction Method | DTPA | DTPA | DTPA | DTPA |
Low | <2.5 | <0.6 | <1.0 | <0.6 |
Adequate | 2.5 - 5.0 | 0.6 - 2.0 | 1 - 1.5 | 0.60 - 2.0 |
High | >5.0 | >2.0 | >1.5 | >2.0 |