No. 6. DEPARTiMENT OF AGKICULTURE. 613 



Buyers who are intei-estcd in the coinparnlive jobbing prices of 

 other materials, will lind the data in the iireceding pages. 



The entire scliedule adoi)ted for use in this State is presented in 

 the following table : 



Pennsylvania Schedule of Values for Fertilizer Ingredients, 1915 



Cents 



Per 



Pound 



Nitrogen: i 



In nnimonium salts 15i 



In nitrates 15 



In uu'iit, dricj lilood, etc I 22 



In mixed fertilizers 19 



In fine ground boue and tankage 17 



In coarse bone and tankage 15 



Pbosplioric acid: 



Available, in bone fertilizers 3J 



Availalile, in rock fertilizers, 2S 



Insoluble in ammonium citrate, in bone fertilizers, 2 



Insolul)le in ammonium citrate, in rock fertilizers, 1 



In fine bone, tankage and fish i 3i 



In coarse bone and tankage 2i 



Potash: 



In high grade sulphate of other forms free from muriate 9i 



As muriate 8i 



FERTILIZERS ANALYSES JANUARY 1 TO AUGUST 1, 1915 



Since January 1, 1915, there have been received from authorized 

 sampling agents one thousand six hundred fertilizer samples, of 

 which six hundred and ten were subjected to analysis. Preference 

 was given to those which have not been recently analyzed. In 

 cases where two or more samples representing the same brand were 

 received, equal portions from several samples were united, and the 

 composite sample was subjected to analysis. 



The samples anah'zed group themselves as follows: 422 complete 

 fertilizers, furnishing phosphoric acid, potash and nitorgen; 9 dis- 

 solved bones, furnishing phosphoric acid and nitrogen; 86 rock and 

 potash fertilizers, furnishing phosphoric acid and potash; 48 acidu- 

 lated rock phosphates, furnishing phosphoric acid only; 24 ground 

 bones, furnishing phosjjhoric acid and nitrogen, and 21 miscella- 

 neous samples, whicli group includes substances not properly classi- 

 fied under the foregoing heads. 



The determinations to which a complete fertilizer is subjected are 

 as follows: (1) Moisture, useful for the comparison of analyses, for 

 indication of dry condition and fitness for drilling, and also of the 

 conditions under which the fertilizer was kept in the warehouse. (2) 

 Phosphoric acid — total and insoluble; the latter is, that portion not 

 soluble in water nor in warm ammonium citrate solution (a solution 

 supposed to represent the action of plant roots upon tlie fertilizer), 

 which is assumed to have little immediate food value. Bj difference, 

 it is e^sy to compute the so-called "available" phosphoric acid._ (3) 



33—6—1915 



