W. Va. Code R. § 61-6-9

Current through Register Vol. XLI, No. 50, December 13, 2024
Section 61-6-9 - Sampling, Analysis Investigational Allowances And Index Value
9.1. The commissioner shall use investigational allowances and overall index values as printed in the current publication of the Association of American Plant Food Control Officials in determining fertilizer deficiencies and overall index value. A commercial fertilizer shall be considered deficient if the analysis of any 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

(N)

Avail. Phosphate

(P2O5)

Sol. Potash

(K2O)

Investigational Allowance, percent

04 or less

0.49

0.67

0.41

05

0.51

0.67

0.43

06

0.52

0.67

0.47

07

0.54

0.68

0.53

08

0.55

0.68

0.60

09

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 DAP and MAP the investigational Allowance for Available Phosphate shall be: 0.70; For TSP the Investigational Allowance shall be: 1.53]

For guarantees not listed, calculate the appropriate value by interpolation.

The overall index value is calculated by comparing the commercial value guaranteed with the commercial value found. The values for commercial fertilizer nutrients are derived from the average retail value from a state-wide survey of bulk fertilizer blenders.

Secondary and minor elements shall be considered deficient if any element is below the guarantee by an amount exceeding the values in the following schedule:

Element Investigational Allowance

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

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

Molybdenum) 0.0001 unit + 30% of guarantee

Sodium) 0.005 unit + 10% of guarantee

Zinc) 0.005 unit + 10% of guarantee

The maximum allowance when calculated in accordance to the above shall be 1 unit (1%).

9.2. The methods of collecting samples and analysis shall be those methods recommended by the Association of American Plant Food Control Officials and the AOAC International respectively.

W. Va. Code R. § 61-6-9