1903.] PUBLIC DOCUMENT — No. 33. 141 



1. The corn crops under the two systems of manuring 

 have been practically equal in value. 



2. The hay crops have been slightly larger on the plots 

 receiving the more liberal application of manure ah)ne ; but 

 these increases have been produced at a cost, where manure 

 is estimated at $5 per cord in the field, which is greater than 

 their value. 



IX. — Special Cokn Fertilizer v. Fertilizer Kiciier 



IN Potash. 

 This field has been used continuously in experiments de- 

 signed to tlirow light upon the question of the proper use 

 of fertilizers for the corn crop since 1891. From that year 

 to 1896 inclusive the crop was corn ; in 1897 and 1898 the 

 crop was mixed grass and clover; in 1899 and 1900, it was 

 corn ; and for the past two years, it has been grass and 

 clover. A full account of results to date will be found in 

 preceding annual reports. The especial object in view is to 

 test the question as to whether the special corn fertilizers 

 ofiered in our markets arc of such composition as is best 

 suited for the production of corn in rotation with mixed 

 mowing. The field is divided into four quarter-acre plots, 

 and throughout the entire period during which the experi- 

 ment has continued two of these plots (1 and 3) have yearly 

 received an application of mixed fertilizers, furnishing the 

 same amounts of nitrogen, phos})horic acid and potash as 

 would be furnished by 1,800 pounds of fertilizer of the 

 composition of the average of the special corn fertilizers 

 analyzed at this station. This average in 1899, since 

 which date there has been no change in the kinds and 

 amounts of fertilizers U!?ed, was as follows : — 



Per Cent. 



Nitrogen, 2.37 



Phosphoric acid, . . . . . . . 10.00 



Potash, 4.30 



The fertilizers analyzed varied widely in composition, the 

 range for each of the elements being shown by the follow- 

 inor : — 



