ARM 4.12.607. INVESTIGATIONAL ALLOWANCES AND OVERALL INDEX VALUE

(1) A commercial fertilizer shall be deemed deficient if the analysis of nutrient is below the guarantee by an amount exceeding the values in the following schedule, or if the overall index value of the fertilizer is below 98%*: Guarantee Percent Nitrogen Percent Available Phosphoric Acid Present Potash Percent 4 or less 0.49 0.67 0.41 5 0.51 0.67 0.43 6 0.52 0.67 0.47 7 0.54 0.68 0.53 8 0.55 0.68 0.60 9 0.57 0.68 0.65 10 0.58 0.69 0.70 12 0.61 0.69 0.79 14 0.63 0.70 0.87 16 0.67 0.70 0.94 18 0.70 0.71 1.01 20 0.73 0.72 1.08 22 0.75 0.72 1.15 24 0.78 0.73 1.21 26 0.81 0.73 1.27 28 0.83 0.74 1.33 30 0.86 0.75 1.39 32 or more 0.88 0.76 1.44 For guarantees not listed, calculate the appropriate value by interpolation. *Overall index value - Example of calculation for a 10 - 10 - 10 grade found to contain 10.1% Total Nitrogen (N) , 10.2% Available Phosphoric Acid (P 2 0 5 ) , and 10.1% Soluble Potash (K 2 0) . Nutrient unit values are assumed to be $3 per unit N, $2 per unit P 2 0 5, and $1 per unit K 2 0. 10.0 units N x 3 = 30.0 10.0 units P 2 0 5 x 2 = 20.0 10.0 units K 2 0 x 1 = 10.0 Commercial Value Guaranteed 60.0 10.1 units N x 3 = 30.3 10.2 units P 2 0 5 x 2 = 20.4 10.1 units K 2 0 x 1 = 10.1 Commercial Value Found 60.8 Overall Index Value - 60.8 x 100 = 101.3% 60.0 (2) Secondary and minor elements shall be deemed deficient if any element is below the guarantee by an amount exceeding the values in the following schedule: Element Allowable Deficiency Calcium 0.2 unit + 5% of guarantee Magnesium 0.2 unit + 5% of guarantee Sulfur 0.2 unit + 5% of guarantee Boron 0.003 unit + 15% of guarantee Cobalt 0.0001 unit + 30% of guarantee Molybydenum 0.0001 unit + 30% of guarantee Chlorine 0.005 unit + 10% of guarantee Copper 0.005 unit + 10% of guarantee Iron 0.005 unit + 10% of guarantee Manganese 0.005 unit + 10% of guarantee Sodium 0.005 unit + 10% of guarantee Zinc 0.005 unit + 10% of guarantee The maximum allowance when calculated in accordance with the above shall be one unit (1%) .