IDHA-Fe Chemical name: Iron iminodisuccinate sodium salt Not popular yet, the effect is yet to be determined.
The chemical name of EDDHA-Fe: Iron ethylenediamine o-diglycolic acid. Plants can absorb it well within the soil pH range of 3-12. (The higher the pH value, the more obvious the advantages of EDDHA chelated iron over EDTA chelated iron and ferrous sulfate.) The color is generally dark brown, with different ortho values (currently 1.8, 2.4, 3.0, 3.6, 4.8 ).
The chemical name of DTPA-Fe: ferric diethylene triamine pentaacetate, is suitable for soil with a pH value of less than 8 and is not easily degraded.
The chemical name of EDTA-Fe: sodium iron ethylenediaminetetraacetate, is suitable for soil with a pH value less than 7 and is not easily degraded.
FeSO4 is a traditional iron fertilizer that is basically not absorbed by plants when the soil pH value is greater than 7. It is inorganic, unstable, and easily oxidized into trivalent iron.
EDDHA-Fe, DTPA-Fe, EDTA-Fe, and FeSO4 are all commonly used iron fertilizers today. The absorption efficiency of chelated iron fertilizers is much greater than that of non-chelated iron fertilizers. EDDHA-Fe has higher biological activity than the other two kinds of chelated iron, DTPA-Fe and EDTA-Fe. It has a wide pH range and is much better than other iron fertilizers.
