The study evaluated why crop growth is inhibited after removing poultry manure stacks by analyzing soil samples from the stacking site. Soil samples found high levels of soluble salts like ammonium, potassium, and manganese in the upper soil profile at the stack center, which can create toxic conditions for germinating seeds. Over time and precipitation events, these salts are flushed from the soil and productivity returns. The passage of time is the ultimate solution, but tilling soil or adding lime before stacking can help speed remediation. Poultry manure stacks pose little risk to groundwater if sited properly but can inhibit crop growth due to soluble salt release.