1. General standards.
The general standards as adopted in the front of this
publication are basic and applies to small grain.
2. Land requirements.
A crop of small grain will not be eligible for
certification if planted on land on which a small grain crop was grown the year
previous except a crop of the same variety grown from certified seed.
In fields double-cropped, neither of the two crops grown
in the previous calendar year shall have been the same kind as the crop being
inspected, unless they were grown from a class of certified seed of the same
3. Field standards.
a. Field Inspection - At least one field inspection shall be made after the
crop is fully headed when varietal or crop mixtures can best be determined.
(1) Wheat, Oats,
Barley, Triticale - A field shall be separated by a strip of ground adequate to
prevent mechanical mixtures. The strip may be either mowed, uncropped or planted
to some crop than the kind being certified.
(2) Rye - All
rye fields used for the production of certified seed must be isolated by at
least 220 yards from the fields of any other variety or varieties of rye or
fields of the same variety that do not meet the varietal purity requirements for
certification. Isolation between diploid and tetraploid rye shall be at least 15
Maximum Permitted in Each
Factor Foundation Registered Certified
None 1:5000 1:2000
Other Crops None None 10
plants per acre
Objectional Weeds None None None
except except except
of trace of trace of
onion onion onion & trace cockle
Diseases. 1:20,000 1:10.000 1:200
(.005%) (0.01%) (0.5%)
*Inseparable other crops shall include crop
plants, the seed of which cannot be thoroughly removed by the usual methods of
cleaning. No rye in other small grains permitted.
**No tolerance for stinking smut in wheat.
4. Seed standards.
Factor Standards for Each Class
Foundation Registered Certified
Pure Seed (minimum)
Wheat, Barley 99.0% 99.0% 99.0%
*Oats, Rye 98.0% 98.0% 98.0%
Inert Matter (maximum)
Wheat, Barley, Triticale 1.0% 1.0% 1.0%
*Oats, Rye 2.0% 2.0% 2.0%
Weed Seeds .01% .02% .05%
Weed Seeds 1/16 per
oz. 1/12 per oz. 1/8
***Other Crops None None .05%
Other Varieties None .01% .05%
Barley, Oats 90.0% 90.0% 90.0%
Rye 85.0% 85.0% 85.0%
Nematodes None None None
*The purity standard for oats may be 98%
provided not more than 1% of the impurities consist of impurities other than
**May include wild onion bulblets and wild
mustard at the rate of not more than 1/16 per ounce for foundation; 1/12 per
ounce for registered; 1/8 per ounce for certified. No corn cockle shall be
included in this percentage.
***Registered small grain may contain .01% of
the following other crop seed, red clover, lespedeza, orchardgrass, fescue,
timothy and rye grass.