Defective Grain
Means any grain which falls within one or other of the following categories:
a:: Discoloured grain
b:: Insect/pest damaged grain
c:: Diseased grain
d:: Immature or shrivelled grain
e:: Fungal damaged grain
f:: Germinated grain
g:: Pass thru 4.15mm sieve

Discoloured Grain
Means grain discoloured by heating, fermentation or weathering.

Insect/Pest Damaged Grain
Means maize which has been damaged by any insect or animal pest.

Diseased Grain
Means maize which is obviously rotted by fungi, bacteria or other organisms of decay.

Immature or Shrivelled Grain
Means immature maize which has indications of lack of maturity or full development and which may be thin and papery (almost see through) in appearance. Maize which is shrivelled over most of its surface.

Fungal Damaged Grain
Means maize with visible mycelial/mould growth on its surface.

Germinated Grain
Means maize grain which shows any signs of germination.

Pass thru 4.15mm sieve
A 4.5 mm grading sieve is a device, the bottom (baseplate) of which is perforated with round-holes 4.5 mm in diameter, and used for the separation of fine extraneous material from grain.

QUALITY PARAMETER	VALUE	QUANTITY IN GRADE A
Test Density	kg/hl	67.25 min
Moisture	%	12.5 max
Extraneous matters	%	1.0 m
Broken Grains	%	6.0 max
Other Coloured grains	%	3.0 max
Total other Defective grains of which:	%	11.0 max
a. Discoloured grains	%	3.0 max
b. Insect/pest damaged grains	%	3.0 max
c. Diseased grain	%	2.0 max
d. Immature or Shriveled grain	%	1.0 max
e. Fugal damaged grains	%	0.5 max
f. Germinated grains	%	NIL
g. Pass thru 4.15mm sieve.	%	1.5 max
Diplodia	%	NIL
Fusarium	%	0.5 max