Bulk-blended fertilizer fails in three recurring ways: segregation between straight materials of different size and density, hygroscopic caking in urea and ammonium nitrate under humidity cycling, and dust release during bagging. Each failure mode maps to a specific diagnostic test rather than a single generic powder check.
- Source: https://powdertechnology.info/fertilizer-powder-granule-handling-segregation-caking-dust-control/
