74 FARM GRASSES OF THE UNITED STATES 



is safe to assume that it will grow well if sown, but if 

 it does not germinate well, the seed should not be con- 

 demned, as the conditions for germination may not 

 have been right, and a sample should be sent for an 

 official test, either to one of the State agricultural 

 experiment stations, or to the United States Depart- 

 ment of Agriculture, Washington, D. C. The follow- 

 ing table * gives the temperature at which germination 

 tests should be made, and the length of time required 

 to make tests : 



* circular No. 34 (revised), Office of Experiment Stations, United States 

 Department of Agriculture, " Rules and Regulations for Seed Testing." 



f Seeds should be kept at the higher temperature for six hours, and at 

 the lower temperature for eighteen hours each day. 



