13 



The analysis of a composite sample has been made whenever 

 possible and in instances where such an analysis has shown a 

 brand to be seriously deficient in one or more plant food elements, 

 a new portion has been drawn from each original sample collected 

 and a separate analysis made. This was done to determine 

 whether the shortage was confined to one sample or whether all 

 of the samples participated in the deficiency. Twelve such 

 analyses have been made on five composites. 



On the last page of the bulletin will be found the results of 

 the analyses of 12 samples of "lava" so-called; they are inter- 

 preted on a subsequent page. 



The following table of trade values of fertilizer 



Trade Values ingredients has been used in this state for the 



of season of 1910. It was adopted by the experi- 



Fertilizing ment stations of New England, New Jersey and 



Ingredients. New York, at a meeting held in March, 1910. 



For purposes of comparison the 1909 schedule is 



also given. 



TRADE VALUES OF FERTILIZING INGREDIENTS IN RAW MATERIALS 

 AND CHEMICALS FOR 1909 AND 1910. 



Cents per pound. 



Nitrogen. 1909 1910 



In ammonia salts 17 16 



In nitrates 163^ 16 



Organic nitrogen in dry and fine ground fish, meat, 



blood and in high grade mixed fertilizers 19 20 



Organic nitrogen in fine* bone and tankage 19 20 



Organic nitrogen in coarse* bone and tankage 14 15 



Phosphoric Acid. 



Soluble in water 4 4}^ 



Soluble in neutral ammonium citrate solution (re- 

 verted phosphoric acid) t Z}/2 4 



In fine* ground bone and tankage 33^2 4 



In coarse* bone and tankage 3 33^ 



In cottonseed meal, linseed meal, castor pomace 



and ashes 3 3^ 



Insoluble (in neutral ammonium citrate solution) in 



mixed fertilizers 2 2 



Potash. 



As sulfate, free from chlorides 5 5 



As muriate (chloride) 4/^ 4X 



As carbonate 8 8 



* Fine and medium bone and tankage are .=ep.irated by a sieve having circular openings 

 Vfo of an inch in diameter. Valuations of these materials are based upon degree of fineness 

 as well as upon composition. 



+ Dissolved by a neutral solution of ammonium cit-ate. sp. gr. 1.09, in accordance with 

 method adopted by Association of Official Agricultural C'hemists. 



