ORCHARD-GRASS, OAT-GRASS, BROME-GRASSES 199 



July 9, gave respectively 5637, 6456 and 7632 pounds 

 to the acre green substance, or 2290, 2462 and 2802 pounds 

 dry substance. At the first date the grass was in bloom ; 

 at the second in the milk stage ; and at the third fully 

 mature. 



217. Hay. The yield of hay from brome-grass is 

 usually small the first year, good the second year and best 

 the third year. Thereafter it falls off rapidly unless given 

 special treatment. The average yield of hay is about 

 1J tons to the acre, the maximum about 3J tons. Yields to 

 the acre have been reported from many experiment sta- 

 tions, as follows : Ohio, 2900 pounds in 1905, 5960 pounds 

 in 1910 ; Wisconsin, 4200 pounds ; Michigan (Upper 

 Peninsula), 4295 and 3285 pounds ; Nebraska, 4640 pounds 

 in 1900, 2640 in 1903 ; Kansas, 6016 pounds, average for 

 4 years ; Colorado (San Luis Valley), 3713 pounds ; Idaho, 

 5600 pounds ; Wyoming, 4400 pounds ; South Dakota, 

 third, fourth and fifth seasons, 3720, 3632 and 7680 pounds 

 respectively ; North Dakota, Fargo, 2520 pounds, and 

 Dickinson, 2520 pounds, average for 2 years ; Indian 

 Head, Saskatchewan, average of 18 yields in 10 years, 

 2622 pounds ; Brandon, Manitoba, average of 6 yields 

 in 4 years, 4100 pounds. 



For yield under irrigation see Par. 41. 



218. Fertilizers. But few fertilizer experiments have 

 been made on brome-grass. Barnyard manure is nearly 

 always helpful, if available. Manured and unmanured 

 plots yielded respectively 2012 and 1242 pounds per acre 

 at Dickinson, N.D., and 5500 and 3920 pounds per acre 

 at Fargo, N.D. 



At the Nebraska Experiment Station a small plot fer- 

 tilized at the rate of about 6 tons of rotted horse manure 

 and 320 pounds nitrate of soda in spring yielded the fol- 



