Findings and scope
In Arkansas production fields, multiple aerations were associated with lower grain inorganic arsenic than conventional flooding; Results §3 reports a 31% lower median. Water management had no statistically significant cadmium effect. This contrasts with the cadmium increase in the Delaware experiment and supports checking both analytes under local conditions.
Methods and Evidence Fitness
The observational study sampled fields during 2018–2024. Polished grain was analyzed after drying to 11% moisture. Species analysis covered 2018–2021. Below-detection values were replaced with half the detection limit. The comparison supports a regional counterexample, with residual confounding and repeated sampling.
Assessment limits
Methods report 103 field-years; Table 1 reports 107 for total arsenic/cadmium. That denominator remains unresolved. Absolute treatment-arm medians, uncertainty, supplements and raw data require reconciliation before quantitative pooling. Nonsignificance does not establish equivalence. A comparison with the FDA infant-cereal action level does not make grain a tested infant cereal.
Related evidence
Update history
18 October 2026: Added the production-field counterexample and retained the unresolved denominator and product-scope limitations.