342 ELEMENTS OF AGRICULTURE 



These spend a part of their life on the ground. By rotating 

 pastures, they may be eliminated. To make this method 

 effective, it must be taken up by states or counties, and 

 these sections would have to establish a quarantine against 

 the surrounding infected area. Details of this subject 

 are given in Farmers' Bulletin No. 258. 



QUESTIONS 



1. What are the leading breeds of dairy cattle in your county? 

 What breeds are gaining in numbers? Why are they preferred? 



2. What effect does better feed have on the per cent of fat in the 

 milk? Farmers' Bulletin No. 225, p. 18. 



3. Do thunderstorms make milk sour? Why does milk sour? 



4. If there are creameries or milk stations in the county, on what 

 basis do they pay their patrons ? What effect does this have on the 

 breed of cows kept and on the quality of the milk? 



5. About how much is the average yield in pounds or quarts per 

 year of the cows of the region? (Obtain opinions of farmers.) How 

 much do some of the best cows produce? How much profit is there on 

 an average cow? On a poor cow? On a superior cow? 



6. If beef cattle are raised, what are the leading breeds? Why are 

 they preferred? 



7. Are the beef cattle of the section raised in the region or shipped 

 into it for fattening? Why? 



8. At what age are the beef cattle usually marketed? Are they 

 marketed at the same age as formerly? If not, why? 



9. What are the chief feeds of beef and dairy cattle of the 

 section? 



10. Who in your county are raising pure-bred animals of any kind? 



LABORATORY EXERCISES 



72. Score Card for Dairy Cows. 



Materials. One or more cows. Each student to fill out the score 

 card. The form here given is a slight modification of that used at 

 Cornell University. 



