MANURES AND FERTILIZERS. 137 



TRADE VALUES OF FERTILIZIXG INGREDIENTS 

 IN RAW 3IATERIALS AND CHEMICALS, 1899. 



Adopted by Eastern Experiment Stations for estimating the value of 

 mixed commercial fertilizers. 



-T. Cents 



Nitrogen— per lb. 



in ammonia salts 15 



in nitrates I2| 



Organic nitrogen — 



in dry and fine-ground fish, meat, blood, and in high- 

 grade mixed fertilizers 14 



in cotton-seed meal, linseed meal, and castor pomace 12 



in fine-ground bone and tankage 14 



in coarse bone and tankage 10 



Phosphoric acid — 



soluble in water 4^ 



soluble in ammonium-citrate solution 4 



in dry fine-ground fish, bone, and tankage 4 



in coarse bone and tankage 2 



in cotton-seed meal, linseed meal, castor pomace, and 



wood ashes 4 



insoluble (in ammonium-citrate solution), in mixed 



fertilizers 2 



Potash as high-grade sulfate, and in mixtures free 



from muriate 5 



as muriate 4| 



The manurial constituents contained in feeding stuffs are 

 valued as follows : 



Organic nitrogen 12 



Phosphoric acid 4 



Potash 4| 



