142 BEEF PRODUCTION 



which is sufficiently large to accommodate the number 

 of cattle on hand. The area selected should be conveni- 

 ent to plenty of feed and water. Surround and divide 

 the lot with a double fence, leaving a space of eight to 

 ten feet. As the ticks can crawl only a short distance, 

 there is thus no danger of their getting from one side to 

 the other or outside of the inclosure. Feed the cattle 

 for twenty days on one side, then remove them to the 

 other side for fifteen or twenty days longer. By this 

 time every tick will have dropped and the cattle can 

 then be placed on tick-free pastures. After the animals 

 are removed the feed-lots should be immediately plowed 

 and thoroughly cultivated, and their edges completely 

 sprayed with crude petroleum, zenoleum solutions, or 

 other substances destructive to tick life. By this 

 method entire farms may be cleaned in a single summer 

 of not exceeding four months. 



