MILK PRODUCTION 243 



Carbohydrates and 

 Fats (pounds) 



4-34 

 5-06 

 5-78 

 6.50 

 7-23 



7-95 

 8.67 



The amount of feed added to that required for maintenance 

 will be used chiefly for the production of milk. The extra 

 feed should be sufficient to keep the cow at her fullest ca- 

 pacity of milk production. As a guide to the amount of 

 each nutrient needed in a productive ration is given the 

 following table of nutrients required to produce one pound 

 of the various grades of milk: 



Butter fat, Carbohydrates and 



per cent Protein (pounds) Fats (pounds) 



3 -4 .224 



3-5 -042 .246 



4 .046 .271 



4-5 -49 .305 



5 .052 .327 



5-5 -55 -340 



6 .057 .364 



By using the table it will be easy to calculate the amount 

 of nutrients required to keep up milk production and per- 

 centage of butter fat, when the percentage of butter fat and 

 the daily yield of milk are known. The entire ration will 

 include the nutrients required for both maintenance and 

 production. For example, if an Soo-pound cow produces 

 30 pounds of milk testing 5.5 per cent of butter fat, she would 



