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Technical Service

Legislation

By Law any Liming product used for Agricultural purpose have to be registered as determined by Act no. 36 of 1947 of the Department of Agriculture, Forestry and Fisheries, under a group 2 Fertilizer, as stated by the registrar in section 3(1) of the law on Registrations. Agricultural liming material means substances of which the calcium and magnesium compounds have the ability to reduce soil acidity and contain no harmful elements;

mg/kg Liming material   Nickel 200
Cadmium 20   Lead 400
Cobalt     Zinc 2750**
Chromium 1750   Arsenic 20
Copper 750**   Selenium 15
Mercury 10   Boron  
Molybdenum     Fluorine  

**Except where they are applied as sources of micro-nutrient.

Calcite means calcium carbonate as it occurs in nature, with a maximum of 9 g/kg magnesium and a minimum of 380 g/kg calcium;

Calcium carbonate equivalent (CCE) means the acid neutralising ability of an agricultural liming material expressed as a percentage of the acid neutralising ability of pure calcium carbonate;

Calcium carbonate means the carbonate of calcium that contains 400 g/kg calcium;

Calcium hydroxide means the hydroxide of calcium that contains 530 g/kg calcium;

Calcium oxide means the oxide of calcium that contains 700 g/kg calcium;

Chelate means the product of a chemical reaction between a metal cation

Physical quality assurance means a test carried out to evaluate the fineness of a liming material and the pellet size of chemically compounded fertilisers or mixtures;

24 No. 35666 GOVERNMENT GAZETTE, 10 SEPTEMBER 2012

Liming materials

44. (1) A liming material may be registered as micro-fine if at least 95% thereof passes through a 250 micron sieve and at least 80% thereof passes through a 106 micron sieve.

(2) A liming material may only be sold if registered as a fertiliser and it meets the following requirements:

(a) the requirements set out in Table 15.

(b) the fineness thereof with the exception of shell lime is as follows:

(i) that at least 50% thereof passes through a 250 micron sieve (0,25 mm); and

(ii) that at least 100% thereof passes through a 1700 micron sieve (1, 7 mm); provided that a finer grade may be registered.

(c) the fineness of shell lime is as follows:

(i) that at least 60% thereof passes through a 500 micron sieve (0,5 mm); and

(ii) that at least 100% thereof passes through a 1700 micron sieve (1 ,7 mm); provided that a finer grade may be registered.

(d) The maximum moisture content thereof on an oven dry basis at 105°C is 150 g/kg and the maximum moisture content of a liming material referred to in subparagraph (2) does not exceed 200 g/kg.

(3) The details in columns 1 to 8 of Table 15 must be given in terms of Regulation 9 in respect of the liming materials, as well as the following information:

Custom mixes

(a) CCE values, according to the strong acid and Relative Resin Suspension methods;

(b) Moisture content; and

(c) Sieve test

Source: Government Gazette, 10 September 2012

Technical Service

Permissible deviations in components I nutrients I micro-element contents

46.

(1) Notwithstanding anything to the contrary contained in these regulations, a fertiliser shall not be deemed to deviate in its registered components/ nutrients or micro-elements contents as long as it:

(a) is within the limits set out in Table 16 and does not deviate more than 1.4% in absolute terms of its registered value for the total nutrients (fertiliser mixture);

(b) is within the limits set out in Table 17 (chemically compounded fertiliser);

(c) is within the limits set out in Table 18 (fertiliser mixture or chemically compounded fertiliser with micro elements); and

(d) does not deviate by more than 7% on a dry mass basis (liming material). Harmful elements

47.

(1) All fertilisers must meet the requirements as specified in Table 12. The levels of harmful elements may not exceed the limit indicted in Table 12.

(2) Each application must be accompanied by a certificate of analysis on the harmful elements contained in such fertiliser.

 

(3) The Registrar may request the applicant to conduct further analysis of harmful elements at any time after the registration of any such fertilisers.


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