19 



water, and of the insoluble, approximately three-fifths was found active by 

 laboratory methods. The exact figures follow : — 



Nitrogen as nitrates and ammoniates, 



Total organic nitrogen, 



Water soluble organic nitrogen, .... 



Active water insoluble organic nitrogen, . 



Inactive water insoluble organic nitrogen, 



Total nitrogen, .2.97 



The average total nitrogen in complete fertilizers had a percentage activity 

 of 87.20 per cent; the total organic nitrogen, 74.30 per cent; and the water 

 insoluble organic nitrogen, 60.80 per cent. 



Phosphoric Acid. — The average total phosphoric acid found in mixed 

 complete fertilizers was 9.12 per cent; 81 per cent of this amount was present 

 in available form, and about 58 per cent of the available phosphoric acid was 

 in water soluble form. 



Potassium Oxide. — The average complete fertilizer contained 3.45 per 

 cent of water soluble potassium oxide, as against 1.88 per cent for the previous 

 year. The following potash guarantees were found : — 



8 per cent guaranteed, 1 brand. 



7 per cent guaranteed, 4 brands. 



6 per cent guaranteed, . 9 brands. 



5 per cent guaranteed, 16 brands. 



4 per cent guaranteed, 87 brands. 



3 per cent guaranteed, 44 brands. 



2 per cent guaranteed, 52 brands. 



1 per cent guaranteed, 17 brands. 



Fractional guarantees, 15 brands. 



Out of a total of 245 brands analyzed, 30, or 13.50 per cent of the total 

 number, failed to meet the minimum potash guarantee. This is a much 

 better showing than in 1919, when nearly 40 per cent of the brands were 

 found deficient in this ingredient. Twenty-five brands designated as mixtures 

 for tobacco showed an average of .77 per cent of chlorine. 



