182 FORAGE PLANTS AND THEIR CULTURE 



growth often makes a fair crop of hay by the end oi 

 August or early September. 



186. Yields of hay. While orchard-grass is best 

 suited for sowing in mixture, it will when seeded alone 

 usually yield about as well as timothy. 



The yield of dry matter at the Illinois Experiment 

 Station was found to be 2642 pounds an acre when in full 

 bloom and 3232 when the seeds were in the milk. 



Yields in pounds per acre have been reported by Ameri- 

 can experiment stations as follows : Ohio, 2197 ; Kansas, 

 2809; Illinois, 2800; Michigan, 2080; Idaho, 5280; 

 Arlington Farm, Virginia, 2880; North Carolina, 1554; 

 Arkansas, 3188. 



In Europe yields have been reported as follows : Sinclair 

 in England, 11,685 pounds; Pinckert in Germany, 3520 

 pounds ; Vianne in France, 15,570 pounds. 



Orchard-grass was grown continuously on two plots at 

 the Michigan Experiment Station from 1897 to 1905. The 

 yield by acre in pounds on the two plots was as follows : 



After plowing up the sod in 1906, the plots were cropped 

 to corn in 1906, oats in 1907 and wheat in 1908. Heavier 

 yields were secured on these plots than on plots that had 

 been in fallow continuously or on others which had been 

 planted to regular rotations mostly including clover. 

 The yield of the orchard-grass for the last seven years was 

 quite uniform. 



For yields under irrigation see Par. 41. 



