230 



FARM AND SCHOOL PROBLEMS. 



A ration balanced for a cow giving a large amount of milk 

 would not be a balanced ration for a cow giving a small amount. 



A dry cow requires what is called a maintenance ration that 

 will supply the needs of the body when she is not working or 

 producing milk. Above maintenance a cow requires a feed that 

 is balanced according to the work she does in making milk. 



A maintenance ration to keep the body in good condition 

 when no work is performed requires enough feed to supply daily 

 .07 pounds of protein and .72 pounds of carbohydrates and fat 

 for each 100 pound's of animal weight. 



PROBLEMS. 



1. How many pounds of protein and how many pounds of carbo- 

 hydrates and fat will be required for a maintenance ration for a cow 

 weighing 1,000 pounds? 



2. How many pounds each of protein and carbohydrates and fat will 

 be required to furnish a maintenance ration for a 1,200 cow? 



The following table from the Wooster Experiment Station 

 in Ohio gives the amount and kind of feed required for cows 

 giving different amounts of milk. 



DIGESTIBLE NUTRIENTS REQUIRED PER DAY BY A TOOOPOUND COW 

 GIVING DIFFERENT AMOUNTS OF MILK. 



NOTE The amounts of nutrients for any amount of milk between 

 those given above can ibe estimated. 



