176 FOOD FOR PLANTS 



largely smoothed out and results are obtained which 

 can be accepted with a fair degree of confidence. 

 The confidence in such results is strengthened when 

 it is found that they check with similar work con- 

 ducted in other places or even in other countries. 



The work was started in these cylinders in the 

 spring of 1898 with corn as the first crop in the rota- 

 tion. Four 5-year rotations have been carried out as 

 follows : 



First Kotation Third Rotation 



1898 Com 1908 Corn 



1899 Oats (millet) 1909 Oats (corn) 



1900 Oats (corn) 1910 Oats (corn) 



1901 Wheat 1911 Rye and oats 



1902 Timothy 1912 Timothy 



(two cuttings) (two cuttings) 



Second Rotation Fourth Rotation 



1903 Corn 1913 Corn 



1904 Oats (corn) 1914 Oats (corn) 



1905 Oats (corn) 1915 Oats (corn) 



1906 Wheat 1916 Wheat 



1907 Timothy 1917 Timothy 



(two cuttings) (two cuttings) 



The corn following the oats is grown as a residual 

 crop (without further addition of fertilizers) to 

 utilize any nitrogen which the oat crop may have 

 failed to get. All corn is planted thick and harvested 

 as forage rather than as mature corn. Oats are 

 harvested as oat-hay just before maturity, and wheat 

 is harvested at maturity and saved as grain and 

 straw. 



Nitrogenous materials are applied for each main 

 crop in the rotation as follows: 



Cylinder 4B, farm manure, at the rate of 16 tons per acre. 

 Cylinder 8B, Nitrate of Soda, at the rate of 320 pounds per 

 acre. 



