872 



EXPEEIMENT STATION EECORD. 



' ' The increase in the rate of excretion of phosphates apparently began a little 

 later, but reached a maximum at the same time with that of nitrogen, after which it 

 fell rapidly, regaining the normal about 12 to 15 hours after the ingestion of the beef. 



" The increased heat of combustion of the urine was but little greater than would 

 correspond to an amount of urea equivalent to the extra nitrogen eliminated. This 

 would seem to indicate that the total amount of the less highly oxidized constituents 

 of the m'ine was but little affected. 



"The nature and extent of the changes in the urine seem to have been about the 

 same when the protein was simply added to the diet as when it was substituted for 

 an isodynamic amount of fat. 



' 'A moderate gain or loss of body nitrogen does not seem to affect the changes noted. ' ' 



Digestion trials, J. Fields and A. G. Ford {O'klahoma Sta. Bui. 

 Jf.G,2'P- '^)- — '^^^ digestibility of a number of grains was tested with 

 chickens and that of forage crops with sheep. 



Digestion trials with ddckens. — The digestibility of Kafir corn, 

 maize, and cowpeas, ground and unground, was tested with 3 cockerels. 

 The experiments in general consisted of a 5-day period preceded by 

 a preliminary period of 2 days. The chickens were supplied with 

 coarse sand and water, ad Uhitum. The amount of sand eaten was 

 recorded and was quite considerable, ranging from T2.6 to 296 gm. 

 per day. The average coefficients of digestibility obtained are shown 

 in the following table: 



Results of digestion experiments with chickens. 



Organic 

 matter. 



Protein. 



Ether 

 extract. 



Nitrogen- 

 free 

 extract. 



Crude 

 fiber. 



Kafir corn 



Kafir corn meal 



Maize 



Maize meal 



Cowpeas 



Cowpea meal . . 



Per cent. 

 87.7 

 87.2 

 86.4 

 85. 5 

 71.5 

 72.2 



Per cent. 

 52.9 

 42.6 



49.8 

 48.4 

 40.5 

 43.7 



Per cent. 

 20.1 

 35.5 



18.4 

 9.6 



Per cent. 

 96.3 

 96.5 

 92.5 

 91.5 

 87.1 

 87.8 



Per cent. 

 73.7 

 82.7 

 91.7 

 93.1 

 88.7 

 88.7 



"Chickens digested Kafir corn and corn more completely when the grain was fed 

 whole than when the meal was fed. The Kafir corn and Kafir meal fed in this trial 

 yielded but 2 per cent less total digestible matter than the corresponding corn prod- 

 ucts. Kafir corn was a more suitable ration, considering only the relative amounts 

 of growth-making and fat-forming materials, for chickens than Kafir meal, corn, or 

 corn meal. Cowpeas were digested reasonably well and are desirable feed for grow- 

 ing chickens and hens. But little gain in digestibility was secured by grinding the 

 cowpeas." 



Digestion trials xoith sheep. — The digestibility of a number of coarse 

 fodders was tested with sheep. The average results follow. 



Digestibility of a number uf forage crops by sheep. 



