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HS1208: Understanding and Applying Chelated Fertilizers Effectively Based on Soil pH

Figure 4. Effects of pH and chelate species, including EDTA, OTPA, and EDDHA, on chelated iron stability (A) (Source: Havlin et al. 2005; Norvell 1972) and on crop yield (B) (Source: Havlin et al. 2005; Lindsay 1974).