12 KAR 4:130. Investigational allowances.

 

      RELATES TO: KRS 250.366(19), 250.391(3), 250.396(1), (2), 250.401

      STATUTORY AUTHORITY: KRS 250.421

      NECESSITY, FUNCTION, AND CONFORMITY: To prescribe scientifically sound and fair investigational allowances as a basis for declaring a fertilizer sample deficient in its guaranteed analyses and to detail the calculation of the index value of a fertilizer.

 

      Section 1. A fertilizer shall be deemed deficient if the analysis of an official sample for any primary nutrient is below the guarantee by an amount exceeding the values in the following schedule.

 

Guaranteed

percent

Total

Nitrogen (N)

percent*

Available

Phosphate

(P2O5) percent*

Soluble

Potash (K2O)

percent*

05 or less

0.37

0.65

0.39

06

0.47

0.71

0.47

07

0.59

0.77

0.56

08

0.72

0.82

0.63

09

0.81

0.86

0.70

10

0.89

0.89

0.76

12

1.03

0.95

0.87

14

1.18

1.02

0.96

16

1.29

1.12

1.05

18

1.43

1.19

1.12

20

1.57

1.32

1.18

22

1.62

1.39

1.22

24

1.65

1.46

1.26

26

1.66

1.53

1.29

28

1.58

1.59

1.33

30

1.28

1.67

1.36

32 or more

1.28

1.67

1.36

 

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

*For these investigational allowances to be applicable, the procedures recommended by AOAC International for obtaining samples, preparation and analysis shall be used. These are described in the 15th Edition (1990) of the Official Methods of Analysis of the AOAC International. In evaluating replicate data, Table 19, page 935, Journal of the Association of Official Analytical Chemists, Volume 49, No. 5, October, 1966, shall be followed. The above materials are hereby incorporated by reference and are available for inspection and copying at 103 Regulatory Services Building, University of Kentucky, Lexington, Kentucky, during regular business hours of 8 a.m. to 5 p.m., Monday through Friday.

 

      Section 2. A fertilizer shall be deemed deficient in the overall index value if the overall index value is less than ninety-seven (97) percent.

      (1) The overall index value is calculated by comparing the value guaranteed with the value found. Unit values of the nutrients used shall be those referred to in KRS 250.401.

      (2) Overall index value. Example of calculation for a 10-10-10 grade found to contain ten and one-tenth (10.1) percent Total Nitrogen (N), ten and two-tenths (10.2) percent Available Phosphate (P2O5) and ten and one-tenth (10.1) percent Soluble Potash (K2O). Nutrient unit values are assumed to be three (3) dollars per unit N, two (2) dollars per unit (P2O5), and one (1) dollar per unit K2O.

 

10.0 units N

x3=

10.0

10.0 units P2O5

x2=

20.0

10.0 units K2O

x1=

10.0

Commercial Value Guaranteed =

 

60.0

10.0 units of N

x3=

30.3

10.2 units of P2O5

x2=

20.4

10.1 units K2O

x1=

10.1

Commercial Value Found =

 

60.8

Overall Index Value = 100(60.8/60.00) = 101.3%

 

      Section 3. Secondary and minor elements shall be deemed deficient if the analysis of an official sample for any of these elements 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

Molybdenum

)

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 to the above shall be one (1) unit (1 percent). (11 Ky.R. 512; eff. 11-13-84; Am. 21 Ky.R. 457; 1027; eff. 9-28-94.)