Available Phosphoric Acid (P2O5) .................... ____________________ percent
Soluble Potash (K2O) .................... ____________________ percent
Total Nitrogen (N) .................... ____________________ percent
Available Phosphorus (P) .................... ____________________ percent
Soluble potassium (K) .................... ____________________ percent
Provided, however, that the effective date of said regulation shall be not less than six (6) months following the issuance thereof, and provided, further, that for a period two (2) years following the effective date of said regulation the equivalent of phosphorus and potassium may also be shown in the form of phosphoric acid and potash; provided, however, that after the effective date of a regulation issued under the provisions of this section, requiring that phosphorus and potassium be shown in the elemental form, the guaranteed analysis for nitrogen, phosphorus, and potassium shall constitute the grade.
Miss. Code § 75-47-5