2 Miss. Code. R. 1-3-04-100.01
All agricultural liming materials, except marl, offered for sale, sold, or distributed in this state shall have clearly stated in the guarantee, the actual Relative Neutralizing Value (RNV). RNV is an expression of aglime effectiveness based on the combined effect of Calcium Carbonate Equivalent (CCE) and fineness of grind. The RNV is determined by multiplying CCE by a set of factors based on the particle size of the agricultural liming material. The minimum RNV allowed for sale in Mississippi shall be 63%.
| Particle Size | % Effectiveness of aglime material |
| Larger than 10 mesh | 0 |
| Between10 and 50 mesh | 50 |
| Less than 50 mesh | 100 |
Computation of Percent Relative Neutralizing Value.
% RNV = CCE x (% passing 10 mesh + % passing a 50 mesh)/2
The RNV of 63% is derived by the following formula. For example, an agricultural liming material with a CCE of 90% with 90% of the material passing a 10 mesh screen and 50% passing a 50 mesh screen would calculate as follows: % RNV = .90(90 + 50)/2 + .90(140)/2 = .90(70) = 63%
The actual RNV of the agricultural liming material must be shown prominently on the front face of the label, sales invoice, delivery ticket or bulk ticket.
2 Miss. Code. R. 1-3-04-100.01