22 



HATCH EXPERIMENT STATION. 



[Jan. 



Nitrogen Fertilizers compared as Fertilizers for Garden Crops. 

 — Yield per Plot (Pounds) . 



It will be seen that for most of the crops the results are 

 similar to the average results of preceding years. Com- 

 bining the results of this year with those of previous years, 

 the relative standing of the different fertilizers used as 

 sources of nitrogen is as follows : — 



For the early crops, i.e., crops making most of their 

 growth before mid-summer, including onions, lettuce, table 

 beets, garden peas, and strawberries : — 



Per Cent. 



Nitrate of soda, 100.0 



Dried blood, 92.7 



Sulfate of ammonia, 54.8 



For late crops, including cabbages, turnips and celery : — 



Per Cent. 



Nitrate of soda, 100.0 



Dried blood, 98.7 



Sulfate of ammonia, 77.5 



The superiority of nitrate of soda as a source of nitrogen 

 for most garden crops, indicated by the results of preced- 

 ing years, is still further confirmed in the case of most of 

 the crops by the results of this year. Nitrate of soda, 

 among the various nitrogen fertilizers, furnishes a pound of 

 nitrogen at present prices at lower cost than any other fer- 

 tilizer which is fairly available. These facts make it evi- 

 dent that it should usually be selected, especially for early 

 crops. Experiments here and elsewhere indicate that, if 

 soil on which sulfate of ammonia is used is heavily limed, 

 its rate of availability is much increased. The purchase 

 and application of lime, however, adds to the cost of the 



