180 



BOARD OF AGRICULTURE. [Pub. Doc. 



During the first one or two years of the experiment nitrate 

 of soda was applied for the full ration at the rate of 450 

 pounds per acre ; but it was concluded that this amount was 

 more than was required, and the application was reduced to 

 63 pounds of nitrogen per acre, requiring approximately 400 

 pounds of nitrate of soda. 



A careful study of the analytical results has now led to 

 the belief that 350 pounds of niti-ate of soda, if supplemented 

 by the other necessary manures, are enough to insure the 

 production of an average crop of about 4 tons of hay per 

 acre for a period of several successive years. 



The tliree plots employed in the experiment have been 

 manured alike, excepting as concerned nitrogen. One plot 

 has received no nitrogen ; one a one-third ration, or 21 

 pounds of nitrogen per acre in the later years ; and the 

 other a full ration, or 63 pounds per acre of nitrogen. 



Below are given the yields of field-cured hay, in tons, 

 obtained in each of the years of the experiment from each 

 of the three plots : — 



In 1900 the total number of grass stalks per square foot 

 upon the plot which received the one-third ration of nitrogen 

 in nitrate of soda was 271, of which 3(5 were timothy and 

 235 red-top. Upon the plot which received the full ration 



* This includes .15 ton secured in the second crop. 



t A second crop of .07 ton was obtained, no account of which is made. 



