Yes, states have developed state-specific guidance for the Phosphorus (P) Index. You can check with your state or county Natural Resources Conservation (NRCS) office.
One source of information for states that have published their index online is State Specific Manure Nutrient Information which may list P-index information for your state.
If you are unfamiliar with a P-Index, introductory information can be found by clicking on the "Reference FAQ" number below.
Author: Joe Harrison, Washington State University
