1904.] PUBLIC DOCUMENT — No. 33. l29 



The relative standing of the dilierent nitrogen fertilizers 

 for the early crops of this year, including dandelions, straw- 

 berries, peas and beets, as indicated by the combined weights 

 of merchantable products, tops and vines, is : — 



Per Cent. 



Dried blood, 100. (K) 



Nitrate of soda, . . . . . • .83.13 

 Sulfate of ammonia, ...... 82. G7 



For the late crops, including tomatoes, cucumbers, celery, 

 cabbages and turnips, the relative standing determined in 

 the same manner is : — 



Per Ceut. 



Nitrate of soda 100.00 



Dried blood 95.20 



Sulfate of ammonia, ...... 85.74 



Combiiiing the results of 1903 with the twelve previous 

 years, the relative standing of the nitrogen fertilizers is : — 



For the early orops : — Per Cent. 



Nitrate of soda, 100.00 



Dried blood, 95.42 



Sulfate of ammonia, ...... 60.03 



For the late eroj)s : — 



Nitrate of soda 100.00 



Dried blood 98.76 



Sulfate of ammonia, ...... 78.96 



B. — The Relative Value of Sulfate and Muriate of Potash 

 for Gardeii Crops. 

 The general conditions under which these experiments 

 have been tried have been already outlined. It will be re- 

 membered that these salts are under trial in connection with 

 the sulfate of ammonia, nitrate of soda and dried blood as 

 sources of nitrogen when used in addition to manure for 

 garden crops. The crops grown on these two potash salts, 

 therefore, are the same as those which have been named in 

 discussino: the relative value of the difierent nitrogen fertili- 

 zers. Each potash salt is used on three plots, i.e., with each 

 of the three nitrogen fertilizers. The results for the past 

 year are shown by the following table : — • 



