DRY-FARMING CONGRESS, WICHITA, 1914 



217 



third period. It was planned to get a direct comparison of these two feeds 

 by comparing in each case the average of the first and third periods with 

 the second period. Cows gradually decline in milk flow, and the average 

 production of the first and third periods would naturally be about equal to 

 the production of the second period. These cows were fed a grain and a 

 hay ration in addition to the silage. The hay ration was kept constant, 

 and the amount fed was based on what the cows would consume. The 

 grain ration was fed in proportion to the amount of milk produced; this 

 remained practically, constant during experiment. The only change, then, 

 in the ration during the experiment was the change made from one kind of 

 silage to the other. The cows were weighed every morning at a stated 

 time in order that a check might be kept on the gain or loss in live weight 

 for each individual. > . ; 



The following table gives the results of the experiment: 



FIRST TRIAL, 1911-1912. 

 CORN SILAGE VS. CANE SILAGE. 



Lot I. Four Cows — Twenty-Day Periods. 



■ ■• .' • y:-; • . ■ ; ;;• . . Body. 



Period. 



Milk. 



Butterfat. Weight. 



1. Corn silage in ration ..; ... 



1337 



-55 . 



4108 



2. Cane silage in ration ..... 



1252 



51 



4131 



3. Corn silage in ration .... . ... 



1178 



49 



4106 



Av. — 1st and 3rd periods, corn silage 



1257 



52 



4108 



2nd period, cane silage 



1252 



. 51 



4132 



Difference 



5 



1 



24 



Lot II. Four Cows — Twenty-Day Periods. 





1. Cane silage in ration 



1192 



54 



4044 



2 Corn silage in ration 



1167 



51 



3953 



3. Cane silage in ration .... 



989 



46 



4020 



Av. — 1st and 3rd periods, cane silage 



1091 



51 



4032 



2nd period, corn silage 



1167 



51 



3953 



Difference 



76 





79 



In studying the table of results on lot I, we find that the cows declined 

 in milk and butterfat production on being changed from the corn to the 

 cane silage. At the same time there was an increase in live weight when 

 the change was made from corn back to cane silage. During the third 

 period, after the cows had been changed from the cane back to the corn 

 silage, they lost in live weight. This shows a direct influence that the 

 feeding of the cane silage had on the live weight. A study of the table 

 giving the average of the first and third periods at the time the cows were 

 fed on the corn silage, and a comparison of this with the second period, 

 when the cows were receiving cane silage, show that the cows gained five 



