ANNUAL MEETING OHIO STATE BOARD OF AGRICULTURE. 



83 



to the loss which manure suffers when exposed in the open barnyard. This ex- 

 periment is on the same farm as the one just described, and is conducted on the 

 same general plan. In this experiment only three crops are grown in rotation 

 corn, wheat and clover and the manure is all applied to the clover sod during 

 the winter and spring, and plowed under for corn, the manure being used uni- 

 formly at the rate of 8 tons per acre. Plots 14 and 17 in this test have been 

 continuously unmanured, while Plot 15 has received manure which has lain in the 

 barnyard during winter, exposed to the weather, and has been hauled out and 

 spread on the land in April, and Plot 16 has received manure which has been 

 taken directly from the barn to the field, and during later years spread early in 

 the winter and allowed to lie until spring when all is plowed under together. 



TABLE 2 FOURTEEN-YEAR AVERAGE YIELDS OF CROPS GROWN in S-YEAR ROTATION. 

 YIELDS AND VALUES PER ACRE. 



Table 2 gives some of the results of this test, and shows that in this test 

 the untreated yields have been practically the same as in the one previously 

 described. The total annual value on Plot 14 has amounted to $11.19, while that 

 on Plot 17, also unmanured, has amounted to $12.58, thus showing a slightly 

 greater irregularity between the untreated pbts than in the other experiment. 

 Compared with these values the crops grown on Plot 15 under yard manure have 

 given an average value of $18.54, and those on Plot 16 under fresh manure, of 

 $21.13, leaving an annual gain per acre for the yard manure of $7.35, and for the 

 fresh manure of '$9.55, or $2.75 for each ton of yard manure, and $3.20 for each 

 ton of fresh manure. On Plots 5 and 6 in this test the same quantities of the 

 same kinds of manure have been used, with the difference that this manure has 

 been dusted with acid phosphate before application to the land, using the phos- 

 phate at the rate of 40 pounds to the ton of manure, the phosphate being thor- 

 oughly mixed with the manure before the latter has been applied to the land. 



Plots 4 and 7, it will be observed, have yielded a value of $11.33, and $10.85, 

 or practically $11 per acre; while Plot 5 has given a total value of $23.17 and 



