54 MANUAL OF GENERAL AGRICULTURE. 



and not so plump as those of the two-rowed barleys, but 

 are higher in nitrogen. 



The varieties of barley are numerous, but only a com- 

 paratively few are grown in the United States. 



Carefully examine samples of each of the above types 

 of barley including samples of both black and white hull- 

 less barley. 



Make drawings from a spike of each type, showing 

 the imbricated view. 



Note that the berry of ordinary barley is tightly in- 

 closed by the flowering glume, called the "hull," while 

 in hulless barleys the flowering glume and palet do not 

 adhere closely and the berry is free. 



In this respect hulled barley is similar to oats, and 

 hulless to wheat. 



LABORATORY STUDY OF CHARACTERS. 



Typical samples in the spike and of the threshed 

 grain are provided. Carefully describe both the spike and 

 grain of one or more samples of the principal types of bar- 

 ley, as the two-, four-, and six-rowed barleys, and black 

 and white hulless barleys. 



The characteristics are obvious enough, so that with 

 a little careful comparison there should be no trouble in 

 finding the proper adjective in the descriptive list. 



Use the outline for describing barleys, filling it out 

 carefully. 



TERMS FOR DESCRIBING BARLEYS. 



Spike 



'Two-rowed (Fig. 1, A). } This refers to the number of rows 



Six-rowed (Fig. 1, B). / of grain on the spike. 



Awned (Fig. 1, A). 



Partly awned (Fig. 1, B). 



Awn less. 

 Length (inches). 



[ Open (Fig. 1, A). 1 Has reference to how close or far 



\ Compact (Fig. 1, B). apart the spikelets are on the 



I Crowded. rachis. 



