§1430.8. Standards
A. All solid agricultural liming materials other than marl or chalk shall have a neutralizing value of at least ninety percent. All marl and chalk shall have a neutralizing value of at least fifty percent. The commission by rule shall establish minimum neutralizing values for industrial byproducts which are to be used as agricultural liming materials. Such rules shall be based upon the recommendations of the Louisiana Cooperative Extension Service.
B. Liquid or suspension materials shall have a neutralizing value of at least fifty percent.
C. The neutralizing value of a material shall be expressed as a percentage of the calcium carbonate equivalent.
D. The commission by rule shall classify substances which are harmful to plant growth and by rule shall establish the maximum amounts of these materials which may be present in agricultural liming materials which are sold, offered for sale, or distributed in this state.
E. Solid dolomitic liming materials shall contain at least six percent elemental magnesium derived from magnesium carbonate. Liquid or suspension dolomitic liming materials shall contain at least three percent elemental magnesium derived from magnesium carbonate.
F. Calcite liming materials shall contain less than six percent elemental magnesium.
G. Solid liming materials shall contain less than fifteen percent moisture.
H. The following materials shall meet the following screen standards:
(1) Aragonite: Ninety percent shall pass through a ten-mesh sieve and five percent shall pass through a one-hundred-mesh sieve.
(2) Burnt lime, finely ground limestone, and marl: Ninety-eight percent shall pass through a ten-mesh sieve and seventy percent shall pass through a one-hundred-mesh sieve.
(3) Ground limestone: Ninety percent shall pass through a ten-mesh sieve, fifty percent shall pass through a sixty-mesh sieve, and twenty-five percent shall pass through a one-hundred-mesh sieve.
(4) Ground shells: Fifty percent shall pass through a one-hundred-mesh sieve.
(5) Suspension materials: One hundred percent shall pass through a twenty-mesh sieve and sixty percent shall pass through a two-hundred-mesh sieve.
I. The state chemist shall determine the neutralizing value, the particle size, and the moisture content of all samples submitted for analysis. The commission in consultation with the state chemist by rule shall establish the method of analysis and the tolerance for all analyses.
Acts 2010, No. 579, §1.
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