S.C. Code Ann. Regs. 27-175
A. Nitrogen, phosphorus, potassium. A fertilizer guaranteed to contain one or more of the elements, nitrogen, phosphorus, potassium shall be deemed deficient if the analysis of nutrient is below the guarantee by an amount exceeding the values in the following schedule. The schedule is the investigational allowances shown in the Association of American Plant Food Control Officials Uniform State Fertilizer Bill (official 1982) plus three (3) percent of the guarantee. The fertilizer is also deemed deficient if the overall index value of the fertilizer is below 98 percent.
| Guarantee | Nitrogen | Available Phosphoric | Potash | |
| percent | percent | Acid, percent | percent | |
| 4 or less | 0.50 | 0.79 | 0.53 | |
| 5 | 0.66 | 0.82 | 0.58 | |
| 6 | 0.70 | 0.85 | 0.65 | |
| 7 | 0.75 | 0.89 | 0.74 | |
| 8 | 0.79 | 0.92 | 0.84 | |
| 9 | 0.84 | 0.95 | 0.92 | |
| 10 | 0.88 | 0.99 | 1.00 | |
| 12 | 0.97 | 1.05 | 1.15 | |
| 14 | 1.05 | 1.12 | 1.29 | |
| 16 | 1.15 | 1.18 | 1.42 | |
| 18 | 1.24 | 1.25 | 1.55 | |
| 20 | 1.33 | 1.32 | 1.68 | |
| 22 | 1.41 | 1.62 | 1.81 | |
| 24 | 1.50 | 1.45 | 1.93 | |
| 26 | 1.59 | 1.51 | 2.05 | |
| 28 | 1.67 | 1.58 | 2.17 | |
| 30 | 1.76 | 1.65 | 2.29 | |
| 32 or more | 1.84 | 1.72 | 2.40 |
A fertilizer shall not be deemed deficient when the overall index value equals or exceeds 100 percent and no more than one primary nutrient is below the guarantee and if the deficiency does not exceed two units or 10 percent of the guarantee.
B. Additional Plant Nutrients.
(3) Boron (B) When Found Excessive. The following penalties will be assessed when the analysis found exceeds the guarantee by more than .1% boron (B).
1976 Code Sections 46-25-710
Although the effective date of this regulation is shown as February 1, 1979 in paragraph C, under the Administrative Procedures Act, regulations become effective on the date of publication in the State Register in final form. This regulation was so published on April 27, 1979.
HISTORY: Amended by State Register Volume 10, Issue No. 4, eff April 25, 1986.