Mich. Admin. Code R. 285.623.207 - Birdsfoot trefoil

Rule 207.

(1) Birdsfoot trefoil seed shall be planted on land on which the same crop has not been previously grown for a minimum of 5 years for producing foundation seed and 2 years for producing certified seed. During the year immediately before seeding, the land shall have been in a cultivated crop or fallow and shall be free of volunteer birdsfoot trefoil plants as determined by field inspection. Manure or other contaminating amendments shall not be applied during the established and productive life of the stand.

(2) Any portion of a field that is not to be inspected shall be mowed before flowering.

(3) Limitations on the age of stand and pedigree classes of seed through which a variety may be multiplied shall be specified by the originator, but shall not exceed the limitations that are established by the certifying agency.

(4) Field standards for birdsfoot trefoil seed are as follows:

Classes of Seed Foundation
Certified	Less than or more		Less than or more
Factor	5 acres	5 acres	5 acres	5 acres
Other varieties or off-types (maximum)	0.1%	0.1%	0.2%	0.2%
Sweet clover (maximum) acre	none	none	1 plant	1 plant per acre per
Isolation from flowering plants of other varieties or uninspected plants (minimum)	900 feet	600 feet	330 feet	165 feet
Isolation between different seed classes of the same variety (minimum)	225 feet	150 feet	85 feet	45 feet

(5) Seed standards for birdsfoot trefoil seed are as follows:

Factor	Foundation	Classes of Seed Certified
Pure seed (minimum)	98.0%	98.0%
Inert matter (maximum)	2.0%	2.0%
Weeds (maximum)	0.1%	0.2%
Prohibited noxious (maximum)	none	none
Docks, sheep sorrel, and restricted
noxious (maximum)	30 per pound	45 per pound
Other crops (maximum)	0.2%	1.0%
Other varieties or off-types
(maximum)	0.1%	1.0%
Sweet clover (maximum)	15 per pound	45 per pound
Germination (minimum)		80.0%
Germination less hard seed (minim	um)	45.0%

Notes

Mich. Admin. Code R. 285.623.207

1994 AACS