80 STOCK AND FEED PKOBLEMS 



5. If a cow averages daily 3 gal. of milk which is 4% 

 butter fat, how much butter does she produce per year ? 



6. A man can buy for $30 a scrub cow that gives 14 Ib. 

 of milk per day, or for $70 a Jersey that gives 25 Ib. of 

 milk per day. If the scrub cow's milk is 2% butter fat and 

 the Jersey's 4J<%, and the butter is worth 200 a pound the 

 year round, which cow will yield the greater per cent on 

 the investment for a year ? 



7. If a cow that gives daily 3 gal. of milk testing 4% 

 butter fat is fed dry feed for 1\ mo. at $5 per month, and 

 is pastured the rest of the year at $1.50 per month, what 

 is the money return in excess of the cost of her keep, when 

 butter is 250 per pound and skim milk 100 per gallon ? 



8. If by feeding a suitable ration to a milch cow she 

 will produce 10 cents' worth more milk and butter fat each 

 day, what will the knowledge of a proper ration yield a 

 farmer in the course of the 7J feed months on 3 milch cows ? 



9. If it costs $32 a year to keep a cow that produces 

 200 Ib. of butter fat, what is the average cost per pound of 

 the butter, assuming that the skim milk pays for all labor ? 



10. A cow whose milk contains 4.2% butter fat must 

 produce how many gallons of milk to yield 84 Ib. of butter ? 



11. Each student should be asked to keep a strict account 

 of the feed given the cows at home for 4 wk. and of the 

 amount of milk produced, and estimate at the local price of 

 feed the cost of producing 1 gal. of milk. 



12. A cow when fed 1 bu. of corn and 1 shock of fodder 

 every 5 da. gave 1 gal. 1 pt. of milk a day ; when fed each 

 day 8 Ib. of corn and 3 Ib. of oats crushed together, and 15 Ib. 

 of clover hay, gave 3 gal. a day. If the cow's milk weighed 

 8J Ib. to the gallon and tested 4% butter fat, how much but- 

 ter did she produce in 90 da. when fed on corn and fodder ? 

 How much when fed on good rations for a dairy cow ? 



