18.5 Is There a Way to Predict IDC Risk?

We unpack why soybean leaves turn yellow in patches, thanks to soybean IDC (iron deficiency chlorosis) and how to predict IDC risk for management. We share the exact soil tests that matter, how to read the lab results, and where precision mapping saves money and yield thanks to IDC management.We also discuss...• defining iron chlorosis• why iron-rich soils still cause deficiency• limits of testing for DTPA iron alone• three key predictors: pH, EC (salts), and CCE (calcium carbonate equivalent)• why percent CCE beats a simple fizz rating• thresholds where CCE raises severe IDC risk• how residual nitrate can worsen chlorosis• grid versus zone sampling for better maps• using maps to place tolerant varieties and inputs• practical steps to keep beans greenTune in next time for a Tiny Byte of knowledge from GK Technology, where we have a map and an app for that!https://gktechinc.com/