19 



8.47%, guaranteed 8.00%; potash found 3.35%,, guaranteed 4.00%o- 

 A connnuuication from the Armour Fertilizer Works states that the 

 formula had been checked up at the factory and no reason could be 

 advanced for the nitrogen deficiency found, as all of the products 

 came from high-grade materials of practically uniform composition. 

 In the instance of the potash deficiency, they state that this element 

 came from Alunite, which is considerably heavier than the other 

 materials in the fertilizer, and would therefore have a tendency to 

 settle in the bags while in transit. Another sample of this brand 

 showed the nitrogen and potash guarantee to be well maintained, 

 only a small deficiency in phosphoric acid being found There was 

 no commercial shortage. 



International Agricultural Corporation. Buffalo Potato and 

 Truck Manure, Nos. 842, 932. Nitrogen found 3. 17%;; guaranteed 

 3.30%; available phosphoric acid found 9.03%, guaranteed 8.00%: 

 potash found 3.26%, guaranteed 4.00%. 



Listers Agricultural Chemical Works. High Grade Special for 

 Spring Crops, Nos. 916, 927. Nitrogen found 2.23%, guaranteed 

 2.06%; available phosphoric acid found 9.00%, guaranteed 10.00%; 

 potash found .97%, guaranteed 1.00%. 



AMMONIATED SUPERPHOSPHATES. Summaries show 

 that out of 158 brands of ammoniated superphosphates analyzed, 58 

 (36.7 per cent of the total number) fell below the minimum guarantee 

 in one or more elements. Fifty-three brands were found deficient 

 in one element, and five in both elements of plant food. Twenty-two 

 brands were found deficient in nitrogen and forty-one in phosphoric 

 acid. Seven brands showed a commercial shortage, one over $2.00 

 per ton, one between $1.00 and $2.00, and five under $1.00, but not 

 less than 50 cents. Following are the brands which have shown 

 serious commercial shortages: 



International Agricultural Corporation. Buffalo Top Dresser, 

 Nos. 64, 101, 115, 445. Nitrogen found 5.50%, guaranteed 5.80%o; 

 available phosphoric acid found 5.65%, guaranteed 6.00%. 



Lowell Fertilizer Co. Market Garden Special Grass and Lawn 

 Dressing; No. 157. Nitrogen found 4.66%, guaranteed 4.92%; 

 available phosphoric acid found 8.32%, guaranteed 8.00%, 



Four other samples of this brand were found well up to the 

 minimum guarantee. 



National Fertilizer Co. High Grade Top Dressing without 

 Potash, No. 937. Nitrogen found 7.73%, guaranteed 8.23%; availa- 

 ble phosphoric acid found 5.97%, guaranteed 5.00%. 



