FARM ANIMALS. 131 



428. How many pounds increase of live weight for 

 each 100 pounds of grain consumed by Lot 1 ? By Lot 2 ? 



429. At the same college some steers were fed in two 

 lots; one a ."balanced ration." the other ear corn. The 

 lot fed the balanced ration made an average gain of 406 

 pounds each, for the period, having consumed 3.05.3 

 pounds of grain and 973 pounds of fodder each ; the lot 

 receiving ear corn made an average gain of 230 pounds 

 each, having consumed 3,223 pounds of grain and 535 

 pounds of fodder each. How many pounds of grain were 

 required to make 100 pounds gain for the balanced ration 

 lot? For the ear corn lot? 



430. What percentage more grain was necessary to 

 make 100 pounds gain with the ear corn ration than with 

 the balanced ration ? 



431. When fodder is worth $5.00 per ton, ear corn 

 40 cents per bushel and grain (composing the balanced 

 ration) $16.00 per ton, what is the cost of producing 100 

 pounds of grain when the balanced ration is fed ? When 

 the ear corn ration is fed? 



Gain in Weight at Different Ages. 



432. Experiments show that a steer of good breeding 

 will gain live weight as follows : 



First period, birth to 297th day, 2.63 pounds daily 

 Second period. 297th to 612th day, 2.18 pounds daily 

 Third period. 612th to 9-43d day. 1.74 pounds daily 

 Fourth period, 943d to 1,283d day, 1.51 pounds daily 



What is the total gain in weight of a steer when 1.283 



days (3>4 years) old? How much more than at birth 



should its weight be, at the end of the first period? 



Second? Third? 



433. During the first period (1-297 days) the aver- 



