9i36 



Feeding Stuffs for January. 



[Jan., 



mixture which siippHes the main essential elements, equal parts 

 by weight of air slaked-lime and salt, or of wood ashes and 

 salt will prove suitable. 



Mineral deficiency in pigs is generally shown by the pigs 

 developing a " staring " coat and a tendency to go down at 

 hindquarters. In severe cases the condition of complete 

 paralysis may occur. The effects produced are very similar 

 to those experiments when diets deficient in vitamines are fed. 



A Simple Method of obtaining the Nutritive Ratio of Mixed 

 'Bations. — Correspondence in the agricultural papers recently 

 suggests that feeders often have great difficulty in ascertaining 

 the nutritive ratio of a mixed ration. The nutritive ratio of a 

 ration shows the proportion existing between the digestible 

 protein of a ration and the digestible non-protein substances. 

 Thus, the nutritive ratio of 1 : 6 indicates one part of digestible 

 protein to 6 parts carbohydrate equivalent. 



From a table of composition of feeding stuffs giving the 

 digestible protein and the nutritive ratio of the separate sub- 

 stances, it is quite easy to calculate the nutritive ratio of any 

 mixed ration. The method is as foiiov;s : — Ascertain the amount 

 of digestible protein present in each ingredient in the ration and 

 multiply this by the nutritive ratio to get the carbohydrate 

 equivalent. Do this for each ingredient in turn, add the 

 digestible protein figures together and also the figures obtained 

 by multiplying by the nutritive ratio, divide this second figure 

 by the first and this will give the nutritive ratio of the ration. 

 a' concrete example will illustrate the method : — 



Bat'wn. Dig. Crude Proteva. Carlohydrnte Equiv. 



4 lb. Linseed Cake ... contains (4 x -253) = I'Ol and (1-01 x2) = 2-02 



50 lb. Mangolds ... „ (50x-007)= -35 „ (•35xl3) = 4-55 

 10 lb. Meadow Hay „ (10x-054)= -54 „ (•54x8^ = 4-32 



1-90 10-89 



10-89 , 



Nutritive* Ratio of Eation = = 1 : 5-6 

 Any other ration may be worked out in a similar manner. 



