The type of chelating agent recommended depends mainly on the method of application, the crop, and the pH value of the soil or other growth media.
The active pH ranges of the products are shown in the table below.
Chelates | pH | |
---|---|---|
min | max | |
Cu-EDTA | 1,5 | 10,0 |
Fe-EDTA | 1,5 | 6,5 |
Fe-EDDHA* | 3,5 | 7,5 - 12,0 |
Fe-DTPA | 1,5 | 7,5 |
Mg-EDTA | 6,0 | 10,0 |
Mn-EDTA | 3,0 | 10,0 |
Zn-EDTA | 2,0 | 10,0 |
* pH depends on the percentage of ortho-ortho isomer.