488 



IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



A comparison of Sudan grass hay with timothy and millet hay 

 shows that these feeds are very similar in composition. The di- 

 gestible nutrients in 100 pounds of dry matter of the various 

 tfeeds have been calculated from Henry & ^Morrison's tables* 

 while the digestible true protein and net energy value of 100 

 pounds of dry matter have been obtained from Armsby 's work.* 



TABLE XV. 

 DIGESTIBLE NUTRIENTS IN 100 LBS. OF DRY MATTER. 



This shows that Sudan grass hay provides considerably more 

 nutrients than does timothy hay and though it contains rather 

 less digestible protein than does millet hay it appears to furnish 

 about the same amount of total nutrients. These comparisons 

 are made on the drv matter basis so as to eliminate variations 

 due to changes in the moisture contents of the feeds. 



TABLE XVI. 



DIGESTIBLE TRUE: PROTEIN AND NET ENERGY. 

 VALUES PER 100 POUNDS OF DRY MATTER. 



The net energy value of the Sudan grass hay has been calcu- 

 lated according to Armsby 's method. While the digestible true 

 protein is taken as 75 per cent of the digestible crude protein. 

 These figures show that Sudan grass hay, thouuli deficient in pro- 

 tein, provides more net energy, per 100 pounds of dry matter, 

 than does hay from timothy or millet. 



''Feeds and Feeding. 

 "Bui. 142 ; Pa. Sta. 



