1898.] 



PUBLIC DOCUMENT — No. 33. 



23 



north plot, 5,760 pounds; south plot, 5,255 pounds. The 

 diliercnce is too small to afford a basis for a positive judg- 

 ment as to the merits of the two forms of potash applied. 



Fertilizers for Garden Crops. 



In 1891 Dr. Goessmann began a series of experiments 

 for the comparison of sulphate of ammonia, nitrate of soda 

 and dried blood as sources of nitrogen for various ofarden 

 crops. Sulphate of potash was employed to furnish potash. 

 In 1892 the scope of the experiment was enlarged by includ- 

 ing three additional plots, comparing the same materials as 

 sources of nitrogen with muriate of potash used as a source 

 of potash. The results of these experiments are fully dis- 

 cussed in Dr. Goessmann's reports. The following table 

 shows the different fertilizers applied to the several plots : — 



The area of the plots is about one-eighth of an acre each. 

 The fertilizers used supply at the rates per acre : phos- 

 phoric acid, 50.4 pounds ; nitrogen, 60 pounds ; potash, 120 

 pounds. 



