The table on the precedinjj; page shows: 

 (1). That out of a total of 323 brands of complete fertilizers 

 analyzed, 159 (49 per cent of the total number) fell below the mini- 

 mum guarantee in one or more elements. These deficiencies may 

 be classified as follows : 



108 brands deficient in one element. 

 47 brands deficient in two elements. 

 4 brands deficient in three elements. 

 (2). That 32 brands (about 9.9 per cent of the whole number) 

 showed a commercial shortage ; that is, when overruns were used to 

 offset shortages the value of the plant food found did not equal the 

 value guaranteed. The deficiencies noted were as follows: 

 S8 brands were deficient in nitrogen. 

 47 brands were deficient in available phosphoric acid. 

 78 brands were deficient in potash. 

 (3). Less deficiencies were found in available phosphoric acid 

 than during the previous season. More deficiencies in nitrogen and 

 potash were recorded than for the previous year. There were 36 

 more potash shortages but the commercial shortages were 14 less 

 than for 1914. 



The following table shows the commercial shortages of 2.> cents 

 and over per ton in mixed commercial fertilizers for 1914 and 1915. 



The following brands have shown a commercial shortage of 50 

 cents or over per ton, the value of overruns being used in all cases 

 to reduce shortages. 



American Agricultural Chemical Co., Extra Special Grass and 

 Garden Mixture. No. 873. Nitrogen found 7.98%, guaranteed 

 8.23%, available phosphoric acid found 6.91%, guaranteed 6.00%, 

 potash found 3.64%, guaranteed 4.00%. Another sample of this 

 brand, Nos. 124-242-669, showed a commercial deficiency amounting 

 to 28 cents per ton. 



Top Dresser. No. 1210. Nitrogen found 4.58%, guaranteed 

 4.94%; available phosphoric acid found 7.96%, guaranteed 7.00%; 

 potash found 2.73%, guaranteed 3.00%. 



Williams and Clark's Americus Potato Manure. No. 1119. 

 Nitrogen found 1.92%, guaranteed 2.06%; available phosphoric 



