1908.] PUBLIC DOCUMENT — No. 33. 49 



differences are comparatively insignificant. The yield of rowen 

 this year was exceptionally small, and for the same reasons as 

 those which have been mentioned in discussing the results on 

 Field A, viz. : late cutting of the first crop, and protracted 

 drought during the latter part of the summer. 



VII. — Soil Tests. 

 Soil test work has been continued upon the two acres which 

 have been used so long in work of this description. The plan 

 is the co-operative method adopted in convention in Washing- 

 ton in 1889. The crops of this year have been, on one acre, 

 corn ; on the other, mixed grass and clover. The latter was 

 sown this spring, and the crop, which was considerably mixed 

 with weeds, was not weighed separately for the different plots. 

 No detailed report will be made, therefore, for this acre. In 

 this soil test work the kinds of fertilizers and the rates of ap- 

 plication per acre are as follows : — 



Nitrate of soda, 160 pounds, furnishing nitrogen. 



Dissolved bone black, 320 pounds, furnishing phosphoric acid. 



Muriate of potash, 160 pounds, furnishing potash. 



Land plaster, 800 pounds. 



Lime, 800 pounds. 



Manure, 5 cords. 



Soil Test with Com (South Acre). — This acre has been 

 used in soil tests for nineteen years, beginning in 1889. The 

 field was limed, each time at the rate of 1 ton per acre, in 1899 

 and 1904. Early in the spring of the present season it received 

 another application of lime, at the rate of 1,000 pounds per 

 acre of R. R. agricultural lime, manufactured by the Rockland- 

 Rockport Lime Company. This was spread after plowing, as 

 in previous years, and harrowed in. The crops for the succes- 

 sive years have been as follows : corn, corn, oats, grass and 

 clover, grass and clover, corn (followed by mustard as a catch 

 crop), rye, soy beans, white mustard, corn, corn, grass and 

 clover, grass and clover, corn, corn, corn, grass and clover, 

 grass and clover. The crop for the present season was corn, 

 which is, therefore, the ninth corn crop grown in the field since 

 the experiment began in 1889. Three times during this period 



