iy03.] PUBLIC DOCUMENT — No. 33. 



143 



Average Yield per Acre {Pounds) 



It will be noticed that the yields both of hay and rowen 

 were considerably heavier on plots 2 and 4 {i.e., the plots 

 which received fertilizers richer in potash) than on the 

 other pair of plots. The proportion of clover was much 

 the larger on plots 2 and 4 ; and, as clover is superior in 

 nutritive value to grass, it is evident that the superiority 

 of the crop was even greater than the weight difference in 

 yield in itself indicates. The cost of the fertilizers applied 

 to plots 1 and 3 exceeds that of the fertilizers applied to 

 plots 2 and 4 at the rate of about $4 per acre. We have, 

 then, as a result of this experiment for this year, 6,772 

 pounds of hay of superior nutritive value, produced at a 

 cost of $4 less than the 5,252 pounds produced by the other 

 pair of plots. This result is in exact accordance with the 

 teachings of the soil test on the south acre. There can be 

 no doubt that potash should be more abundant in fertilizers 

 for corn than is usually the case. It is important to point 

 out the further fact that the difference between the two 

 pairs of plots, as indicated by the greater productivity of 

 the plots receiving the heavier application of potash, seems 

 to be increasing from year to year. The results of this 

 experiment to date may be briefly stated as follows : — 



1. The crops of corn thus far have been substantially 

 equal under the two systems of manuring. 



2 . The crops of hay have always been larger on the plots 

 where more potash has been used, and the nutritive value 

 pound for pound has been greater on account of the larger 

 proportion of clover. 



In conclusion, I may quote from my report for last year : — 



In view of the fact that the clover sod when turned is exceed- 

 ingly favorable for succeeding crops, it is confidently anticipated 



