1904.] PUBLIC DOCUMENT — No. 33. 129 



The relative s?taiiding of the diHerent nitrogen fertilizers 

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

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

 of Mierchantnble })roducts, tops and vines, is : — 



Per Cent. 



Dried l.lood 100. UO 



Xitnitc of so»l:i, . . . . . • .83.13 



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



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

 cabbages and turni^js, the relative stiinding determined in 

 the same manner is : — 



Per Cent. 



Nitrate of soda, 100.00 



Dried blood 95.20 



Sulfate of ammonia, ...... 85.74 



Combining the results of 1903 with the twelve previous 

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



For the early crops : — Per Cent. 



Nitrate of .*ioda, ....... 100.00 



Dried blood, 95.42 



Sulfate of annnonia, ...... 60.03 



For the late crops : — 



Nitrate of sod:i 100.00 



Dried Ijlood 98.76 



Sulfate of ammonia, ...... 78.96 



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



for Garden 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 

 discussing the relative value of the different nitrogen fertili- 

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

 of the three nitrogen fertilizers. The results for the past 

 year are shown by the following table : — 



