Food for degree of temperature wherein the soil bacteria again 



!Hf become active and convert organic and other forms of 



108 Nitrogen into Nitrates. 



To overcome this natural deficiency of soluble 

 Nitrogen at a critical time in the growth of the timothy 

 plants, we must supply it in an available form, and this 

 can best be done by applying broadcast about 100 to 

 200 pounds of Nitrate of Soda per acre as a top-dressing 

 as soon as the excess moisture has settled down out of 

 the surface soil and growth starts in the spring, between 

 April 10th and May 10th, in our principal hay growing 

 States. 



In other words, as Professor Thomas F. Hunt puts 

 it, in Cornell University Experiment Station Bulletin, 

 No. 247, p. 203: 



"Having water-soluble Nitrogen on tap at the right hour and 

 the right place is one of the factors that enabled the Cornell 

 Station to grow three and one-half tons of timothy hay on Dunkirk 

 clay loam, when without this artificial help only about one and one- 

 half tons could be raised." 



Report of Experiments. 

 Season of 1906. 



Highland Experimental Farms, New York. 

 The average yields per acre of field-cured hay on 

 the uplands were as follows : 



No Nitrate — 3200 pounds per acre. 

 168 lbs. Nitrate — 6240 pounds per acre. 

 The average yields per acre of field-cured hay on the 

 lowlands were as follows : 



No Nitrate — 5920 pounds per acre. 

 112 lbs. Nitrate — 8080 pounds per acre. 



Comparison of Yields, 1905 and 1906. 



Uplands. 

 Season. 



1905. No Nitrate— 3180 lbs. 300 lbs. Nitrate— 8340 lbs. 



1906. No Nitrate— 3200 lbs. 168 lbs. Nitrate— 6240 lbs. 



