26 



CONTROL SERIES No. 45 



CHEMICALS AND RAW PRODUCTS 

 Summary of Results of the Inspection of Fertilizer Simples and Raw Products. 



1 Taken from previous compilations. 



' Total potash, taken from previous compilations. 



' In computing the pound cost of nitrogen and commercial valuation, the value of the phosphoric 

 acid and potash was not included. The average commercial valuation of the phosphoric acid and potash, 

 based on 1928 fertilizer trade values, would be: cottonseed meal, $3.78; linseed meal, $2.37; rapeseed 

 meal, $2.41; castor pomace, $2.11. 



* There was also 11.40% of magnesium oxide present. 



5 Twelve of the samples were found adulterated with ammonium sulfate and gave an average of 1.64% 

 ammoniacal nitrogen. 



8 Average tankage finer than 1/50 inch diameter, 52.62%; coarser than 1/50 inch, 47.38%. 



' Average ground bone finer than 1/50 inch diameter, 67.74%; coarser than 1/50 inch, 32.26%. 



' Total potash. 



» The value of the lime and magnesium oxide in a ton of average wood ashes would be about $5. This 

 is not included in the valuation given here. The averages of the other determinations made were: moisture, 

 12.69%; calcium oxide, 34.38%; insoluble earthy matter, 13.68%. 



i" On account of the wool fiber present the value of the nitrogen is one-third less than in sheep manure. 

 '^~' *i Nitrogen valued at $7 per unit, as it is much more active than in the other manures for which the val- 

 uation is $6.25 per unit. 



