available phosphoric acid in a fertilizer, meaning the soluble 

 and the reverted taken together. 



Insoluble phosphoric acid is that which is neither soluble 

 in water nor " ammonium citrate." 



Table showing sources of deficient plant food, the per cent, of 

 each constituent, the cost per hundred weight delivered in 

 central New Hampshire, and weight per measured half bushel : 



Part reverted. 



J 



pSt HisoTiibie \ Thomas-Gilchrist slag, 



(isperct.) *- 



21 



•25 



O tad 



(U . 



0.50 

 2.40 



*And two and one-half per cent, of nitrogen. 



f Wood ashes, > 6 



^ I Muriate of potash, 50 



j Sulphate of potash, 22 

 * Sulph. potash (high grade) 50 3.50 



Kainit, 12 .75 



Krugit, 8 .75 



Dried blood, 12 2.00 



Fish waste, 7 



Bone, 2.5 



Nitrate of soda, 15 



Nitrate of potash, 13 



Sulphate of ammonia, 20 

 *And twenty-four per cent, phosphoric acid. 



G. H. WHITCHER, Director. 



* 



1-75 

 3.00 



5.00 



4.00 



23 

 34 



40 



39 

 39 

 19 



44 



31 



These Bulletins are sent feee to all persons in the State who request 

 them. A postal card with your name and address will insure the publications 

 as issued. 



Address all communications to N. H. Experiment Station, Hanover, 

 N. H. 



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