21 



a much better showing than during the preceding year. The de- 

 ficiencies this season were as follows: 



Brands deficient in one element 46, 



Brands deficient in two elements 10, 



Brands deficient in three elements 1. 



Only 5 brands, (2.2 per cent of the whole number) showed a com- 

 mercial shortage. 



The deficiencies in the several ingredients were as follows: 



Brands deficient in nitrogen 21, 



Brands deficient in available phosphoric acid 17, 



Brands deficient in potash.... 31. 



Less deficiencies were found in all three elements than for the 

 previous year. 



The following table shows the commercial shortages of 25 cents 

 and over per ton in mixed complete fertilizers, as compared with 1915. 



The following brands have shown a commercial shortage of 

 50 cents or over per ton, shortages being reduced in all cases by 

 values of over-runs in other ingredients. 



Armour Fertilizer Works, Armour's Grain Grower, No. 1077. 

 Nitrogen found 1.56%, guaranteed 1.65%; available phosphoric 

 acid found 8.22%, guaranteed 8.00%; potash found 1.78%, guaran- 

 teed 2.00%. 



Armour's 4-8-2 Fertilizer, No. 1076. Nitrogen found 3.26%, 

 guaranteed 3.29%; available phosphoric acid found 8.02%, guaran- 

 teed 8.00%; potash found 1.82%, guaranteed 2.00%. 



R. i5- J. Farquhar ^' Co., Farquhar's Pulverized Sheep Manure, 

 No. 420. Nitrogen found .87%, guaranteed 1.25%; phosphoric 

 acid found .87%, guaranteed .90%; potash found 1.03%. guaranteed 

 2.00%. 



Ross Bros. Co., Worcester Special Lawn Dressing 1915, No. 

 1002. Nitrogen found 3.05%, guaranteed 2.88%; available phos- 

 phoric acid found 8.01%, guaranteed 8.00%; potash found 3.68%, 

 guaranteed 4.00%. Another sample of this brand, No. 852, did not 

 show a commercial shortage. 



F. S. Royster Guano Co., Royster's Arrow Head Tobacco Fer- 

 tilizer, No. 738. Nitrogen found 3.63%, guaranteed 4.11%; avail- 

 able phosphoric acid found 4.86%, guaranteed 4.00%; potash found 

 1.82%, guaranteed 2.00%. 



