SEED INSPECTION 



"Tolerance" is applied to both purity and germination, except for vegetable 

 seed found below the minimum germination standards adopted, in which instance 

 no tolerance is allowed. "Germination Tolerance" has been applied between 

 a given germination and the result of the germination test as follows: 



GIVEN GERMINATION (PERCENT) TOLERANCE (PERCENT) 



96 or over 5 



90 or over, but less than 96 6 



80 or over, but less than 90 7 



70 or over, but less than 80 8 



60 or over, but less than 70 9 



Less than 60 10 



In the determination of the tolerance for the percentage of the distinguishable 

 kind, type, or variety (pure seed), weed seeds, other crop seeds, and inert matter, 

 the sample shall be first considered as made up of two parts: (a) The percentage 

 of the component (pure seed, weed seed, crop seed or inert matter as the case 

 may be) being considered, and (b) the difference between that percentage and 

 100. The number represented by (a) is then multiplied by the number rep>- 

 resented by (b) and the product is divided by 100. The resulting number is then 

 multiplied by 0.2 (2/10) and the resulting product added to 0.2 or 0.6 as indicated 

 in the following formulae : 



f a X b ) 



Pure seed tolerance = 0.6 + j 0-2 X > 



Weed seeds, other crop seeds, and v h ~» 



inert matter tolerance = 0.2 + i 0.2 X ?■ 



\ 100 f 



For Poa spp., Agrostis spp., Festuca spp., bromegrass, crested wheatgrass, or- 

 chard grass, velvet grass, tall oatgrass, meadow foxtail, sweet vernalgrass, 

 Rhodes grass, Dallis grass, carpet grass, and Bermuda grass, and mixtures con- 

 taining these seeds singly or combined in excess of 50 percent, an additional 

 tolerance shall be allowed. This is to be obtained by adding to the regiilar 

 tolerance mentioned above the product obtained by multiplying the regular tol- 

 erance by the lesser of "a" and "b" divided by 100. 



