(Includes
Grain, Forage and Syrup Sorghum, Sudangrass and Broomcorn)
I.
Land Requirements
Certified
seed must be produced on land which did not produce any other variety of
sorghum or an uncertified crop of the same variety the previous year.
II.
Field Inspection
Two
field inspections shall be made on sorghums intended for foundation seed or
registered seed production, one at blooming time and the other at maturity.
One inspection is required on sorghum intended for certification after
the crop has attained a mature color. Certified
seed fields shall be inspected before harvest but after the seed begins to
assume mature color.
III.
Field Standards
A.
General
1.
Unit of Certification
The
unit of certification shall be a field, but a portion of a field may be
approved provided the discarded portion can be harvested separately and is
eliminated from certification.
2.
Isolation
a.
Minimum isolation distances from other common
sorghums shall be 1,320 and 990 feet for the
Foundation and Certified classes respectively.
b.
Minimum
isolation distance for sorghum or broomcorn
from sudangrass shall be 990 feet.
c.
|
Factor |
Maximum permitted in each class |
|
|
Foundation |
Certified |
|
|
Other varieties (definite) |
None |
1:20,000
heads |
|
Other
varieties (doubtful) |
None |
1:4,000
heads |
|
Inseparable noxious weeds ¹ |
None |
None |
|
Kernel
smut ² |
None |
1:2,500
heads |
|
Head smut ² |
None |
1:10,000
heads |
1Noxious weeds producing seed that
are so similar to sorghum seed in size and specific gravity that they cannot
be cleaned from the seed by the regular methods of cleaning.
2If
head or kernel smut is discovered in production field, the seed produced must
be treated with material as recommended by the Experiment Station before such
seed is finally approved to be sold as certified seed.
IV.
Referee Sample
A
representative 2-pound sample of the seed as it is to be sold shall be
submitted to the Association for laboratory analysis.
|
Factor |
Standards for each class |
|
|
Foundation |
Certified |
|
|
Pure seed (minimum) |
98.0% |
98.0% |
|
Inert
Matter (maximum) |
2.0% |
2.0% |
|
Weed seed (maximum) |
0.1% |
0.1% |
|
Prohibited
weed seed (maximum)¹ |
None |
None |
|
Other kinds, including other
varieties (maximum) ² |
0.03% |
0.07% |
|
Other
varieties (maximum) |
None |
2
seeds per lb. |
|
Germination (minimum) |
80.0% |
80.0% |
1See Section XLI P, also, hedge
bindweed (Convolvulus sepium),
dock (Rumex spp), and morningglory (Ipomoea spp.).
2Other
kinds shall not exceed 2 per lb. for Foundation; 10 per lb. for Certified.