By Hernan Gonzalez Mejia, Parvej, Md Rasel
LSU AgCenter
Test the soil from each field regularly for every complete crop rotation or every two to three years before making any fertilization decisions.
Collect soil samples from 0 to 6 inches in depth and choose a lab that uses Mehlich-3 extractant.
Obtain fertilizer recommendations based on the soil test for specific crops from the respective state soil testing lab, as these recommendations vary by crop and state.