Guarantee Percentage | Total Nitrogen | Available Phosphate | Soluble Potash Percentage |
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 |
Provided that when the found relative value of a sample is equal to or exceeds the guaranteed relative value, an overage in primary nutrients may compensate for a deficiency in another primary nutrient up to 10% of the guarantee of the deficient nutrient, not to exceed two units. No compensation shall be allowed toward a deficiency if the overage does not compensate for the entire amount of the deficiency or if the deficiency exceeds 10% of the guarantee or the deficiency exceeds two units. If more than one primary nutrient is in penalty status, no compensation shall be allowed.
N.C. Gen. Stat. § 106-665