l6 THE FORAGE AND FIBER CROPS IN AMERICA 



Table Showing True Nutritive Value of Different Feeding Stuffs 



ample, with red clover and alfalfa the origin of the seed may 

 be a matter of importance. 



Seed control stations determine the kinds and percentages 

 of impurities and the power of germination that is, the per- 

 centage of pure seeds which can germinate or grow. 1 The 

 percentage of viable pure seed is obtained by multiplying the 

 percentage of pure seed by the percentage of total germination 

 of the pure seed. This is sometimes spoken of as the actual 

 value of the sample. A sample, however, that contains 90 per 

 cent, of viable pure seed may be relatively more valuable than 

 a sample containing 80 per cent, than is indicated by 90 : 80, 

 because of the more vigorous growth of seeds of high ger- 



1 For example of pure seed law, see Maine Station Report, 1896, p. 181; 

 or, Bui. No. 36 (1897), p. 65. 



