SORGHUMS 



283 



the leaves dry more or less after full bloom, it is probably 

 best cut at that time. In the following analyses, perhaps 

 the most important point shown is the close comparison 

 of the mature plant with that cut in bloom : 



342. Seed-production. Sudan-grass yields excellent 

 crops of seed, especially if planted in cultivated rows. 

 At Arlington Farm, Virginia, a yield of 12.8 bushels an 

 acre was obtained when planted in 18-inch rows, while 

 but 3.7 bushels were secured from broadcasted plats. At 

 Chillicothe, Texas, under farm conditions a yield of 356 

 pounds an acre was secured from 36-inch rows, and on 

 another farm 642 pounds from 42-inch rows. At the South 

 Dakota Experiment Station small plots have yielded at the 

 rate of 1000 to 1500 pounds an acre. The seed weighs 

 32 to 44 pounds a bushel. 



Seeol for commercial purposes should be grown on land 

 not infested with Johnson-grass, as the seeds of the two 

 are distinguishable only with difficulty. Where Johnson- 

 grass is abundant, Sudan-grass for seed should be grown 



