220 FORAGE PLANTS AND THEIR CULTURE 



The grass is somewhat subject to a rust (Puccinia 

 rubigo-vera), but otherwise is free from diseases. 



At Indian Head (Saskatchewan) Experimental Farm, 



yields of hay in large 

 plots have been re- 

 ported since 1901. 

 The yields have va- 

 ried from 2000 to 

 9000 pounds an acre, 

 the average of 14 

 fields during 9 years 

 being 4800 pounds. 

 The best yields were 

 nearly always secured 

 the second season 

 after seeding, unless 

 the field was reno- 

 vated by manuring. 



At Brandon, Man- 

 itoba, the average 

 yields for 7 years have 

 been 4694 pounds an 

 acre. 



A plot of one-fourth 

 acre at the South 

 Dakota Experiment 

 Station was not cut 

 during the first two 

 years. The hay 

 yields during the 

 three following years were respectively 980, 908 and 1920 

 pounds an acre. 



At Guelph, Ontario, it has yielded the most heavily 



FIG. 23. Slender wheat-grass (Agropy- 

 ron teherum). a, glumes; b, spikelet with 

 glumes removed. 



