THE YOUNG FARMER 



It has been customary in most states to 

 make analyses only of mixed fertilizers. 

 Thus such raw materials as nitrate of soda, 

 sulphate of ammonia, dried blood, bone 

 meal, rock phosphate, tankage, muriate of 

 potash, sulphate of potash, have not been 

 brought under the operation of the law. If 

 one wishes to purchase nitrate of soda, 

 muriate of potash and tankage with the in- 

 tention of mixing them according to a 

 formula of his own, he may not find any 

 protection in his state. However, these pro- 

 ducts can be obtained through reputable 

 dealers who will willingly guarantee the 

 contents. In case of doubt, the purchaser 

 may secure an analysis by his state experi- 

 ment station at a moderate cost. 



The law requires that there shall be 

 affixed to every package of fertilizer offered 

 for sale a statement about as follows : 



The minimum per centum of each of the following 

 constituents which may be contained therein: 



(a) Nitrogen. 



(b) Soluble, available and total phosphoric acid, 

 except in cases of undissolved bone, basic slag phosphate, 



2 S4 



