152 AGRICULTURAL EXPERIMENT STATION. [Jan. 



The entire field, eleven plats, was ploughed April 9. The 

 fertilizer was applied broadcast to each plat, and subse- 

 quently slightly harrowed under, April 27. The final prepa- 

 ration of the soil for seeding, by ploughing and harrowing, 

 took place May 9. The same variety of corn (Clark), a 

 flint corn, was planted in drills in a similar manner as during 

 preceding years, May 10. The crop on all plats was kept 

 clean by means of the cultivator and hoe ; it was cut Sep- 

 tember 3, when the kernels were fairly glazed over. The 

 degree of progress in the growth of the corn upon difterent 

 plats during the entire season may be noticed from the fol- 

 lowing tabular statement of periodical measurements of their 

 average heights : — 



Height of Corn on Plats, in Inches (1S89). 



The marked diflerence in the general appearance of the 

 corn crop on diflerent plats during the various stages of its 

 growth was, however, not confined to their varying heights ; 

 they diflered also at times much in regard to a more or less 

 healthy color. The growth upon plats 7 and 9, in particular, 

 was, during the entire season, of a light-green color ; the 

 same feature was noticeable to some degree, during the first 

 half of the season, on plats 4, 5, 6 and 8. Upon the remain- 

 ing plats the color was deep green, indicating a vigorous 

 condition. Plats 4, 7 and 9 received no nitrogen-containing 

 manurial substance; plats 5, 6 and 8 received an addition 



