64 



MASS. EXPERIMENT STATION BULLETIN 158. 



have been established that take the hulls from the cottonseed crushers 

 and remove the last trace of hiit. Only a small proportion of the hulls 

 produced, however, are entirelj'^ dehnted. 



Here follow the analyses of cottonseed hulls, cottonseed hull bran, and 

 cottonseed feed meal made at the experiment station: — • 



' This analysis was made in connection with some experimental work at the experiment sta- 

 tion prior to 1900. Owing to improved processes in the separation of meats and hulls, cotton- 

 seed hulls now contain less protein and fat than formerly. 



2 Analysis of sample u.sed in digestion experiment. 



Experiments have shown about 41 per cent, of the cottonseed hulls to 

 be digested and utiUzed by ruminants, as compared with 55 per cent, in 

 case of timothy hay. In other words, in 1 ton of material there would be 

 820 pounds of cottonseed hulls digested as compared with 1,100 pounds of 

 timothy hay. Data are not available for the cottonseed hull bran, but 

 it is not believed its digestibiUty is much gi-eater. The results of a 

 digestion trial with cottonseed feed meal made at this station follow : — 



Digestion Coeffi.cients for Cottonseed Feed Meal. 



' This figure simply show.s that all of the fat was digested, together with 2 per cent, more of the 

 fat in the hay fed than was digested when the hay was fed alone. 



The low fiber digestibiUty is due to the tough, woody character of the 

 hull. Tliis material contains only about three-fourths of the total digest- 

 ible dry matter of cottonseed meal of good quaUty. Furthermore, since 

 it contains much less digestible protein and two and one-half times as 

 much total fiber as genuine cottonseed meal, it is not worth more than one- 

 half as much for animal feeding. At the present time (October, 1914) it 

 is being offered at a price about three-fourths that of choice cottonseed 



