18 THE UNIVERSITY OF OKLAHOMA 



to know if such is also the case with the grain sorghums. In order 

 to bring out the limitations in the nutritional value of the grain 

 sorghums several groups of young animals were fed on these 

 grains. One pen of animals was fed yellow milo, another pen darso, 

 which is red in color, another pen was fed white kafir, a fourth 

 pen was used for control observations. Each pen received the 

 sam.e kind of grain sorghum throughout the entire experiment. At 

 the beginning of the experiment all animals were fed a diet con- 

 sisting of only the grain sorghum seed for a period of one month. 

 At the end of this time growth ceased in the animals, i. e.. their 

 weight became stationary, this is en account of the fact that as was 

 explained before the protein in the grain sorghums does not sup- 

 port growth. At the end of one month, purified protein from milk 

 was added to the diet of each pen, including the controls, the con- 

 trol pen received other foods such as fresh milk and raw vegetables. 

 The milk protein used v/as purified in order to eliminate the in- 

 troduction of any of the so-called vitamines to the diet excepting 

 those contained in the seed of the grain sorghum. 



As was explained before the protein of the milk supplements 

 the deficiency of the protein of the grain sorghum. 



The diet now consisted of grain sorghum seed 90 per cent milk 

 protein 7 per cent and salt 3 per cent. The animals were fed on this 

 diet for two months and the increase in weight of each pen care- 

 fully noted. The increase in weight of each pen is shown graphically 

 in the accompanying chart. It will be noted that the growth in 

 each pen including the control pen is nearly the same. From this 

 we M'ould conclude that the nutritional value of the three types of 

 grain sorghums are equal in value, and that they contain a sufficient 

 quantity of the so-called growth accessory substance. At the end 

 of the second month all the animals were again placed on a diet 

 composed exclusively of the grain sorghums, the same kind of 

 grain sorghum it had received before. A very slight increase in 

 weight, or even a decline was shown for the next fifteen days. 



From the results obtained from this experiment we conclude 

 that of the three types of grain sorghums examined, yellow milo, 

 darso, and white kafir, there is no difference in their nutritional 

 value. Darso seems, however, to be slightly distasteful to some 

 animals. The nutritional failure when the diet is composed of 

 grain sorghums only, is due to the protein, which from the stand- 

 point of nutrition is incomplete. 



