No. 6. DEPARTMENT OF AGRICULTURE. 539 



Respecting dissolved rocks, the computed commercial valuations of last 

 year were, each season, lower on the average than the selling price. Mean- 

 while, though New York quotations for acid phosphate show, as yet, no 

 change, the price of sulphur has slightly increased, that of pyrites more pro- 

 nouncedly, and those of phosphate rocks, from 25 to 50 per cent. Labor costs 

 have also increased. On these grounds, it has been decided to add one-half cent 

 per pound to the values for water soluble and citrate soluble phosphoric acid, 

 thus increasing the total valuation of the average dissolved rock by about 

 $1.50. This increase corresponds to that made for phosphoric acid in complete 

 fertilizers. 



Respecting bone: The average commercial valuation for ground bone in 1906 

 corresponded quite well to the selling price. New York wholesale quotations 

 show no increase in rough bone prices. Tankage values for nitrogen have, 

 however, markedly increased. This, together with the increased prices for ni- 

 trogen from other sources, will tend to cause a change in like direction in the 

 value of bone nitrogen. For this reason, the values for nitrogen in fine and 

 coarse bone and tankage have been somewhat increased. 



Schedule of Values for Fertilizer Ingredients, 1907. 



Cents 

 per 

 Pound. 



Nitrogen : 



In ammonia salts ' 17% 



In nitrates ' 18% 



In meat, dried bloow and mixed fertilizers, ' 20% 



In fine ground bone and tankage, 15 



In coarse bone and tankage, | 13 



Phosphoric acid: 



Soluble in water. In bone fertilizers j 5 



Soluble in water, in rock fertilizers, i 3% 



Soluble in ammonium citrate, in bone fertilizers | 4% 



Soluble in ammonium citrate, in rock fertilizers, ', 3 



Insoluble in ammonium citrate, in bone fertilizers I 3 



Insoluble in ammonium citrate, in rock fertilizers 1% 



In fine bone, tankage and fish, 3 



In coarse bone and tankage 2% 



In cotton seed meal, caster pomace and wood ashes 4 



Potash: 



In high grade sulphate or forms free from muriate 1 6 



As muriate 4% 



Potash in excess of that equivalent to the chlorin present, will be valued as 

 sulphate, and the remainder as muriate. 



Nitrogen in mixed fertilizers will be valued as derived from the best sources 

 of organic nitrogen, unless clear evidence to the contrary is obtained. 



Phosphoric acid in mixed fertilizers is valued at bone pliosphoric acid prices, 

 unless clearly found to be derived from rock phosphate. 



Bone is sifted into two grades of fineness: Fine, less than 1-50 inch in diam- 

 eter; coarse, over 1-50 inch in diameter. 



The result obtained by the use of this schedule does not cover the items of 

 mixing, bagging, freight and agents' commission. To cover these, allowances 

 are made as follows: 



For freight, an allowance of $2.00 per ton on all fertilizers. 



For bagging, an allowance of $1.00 per ton on all fertilizers, except when sold 

 in original packages. 



For mixing, an allowance of $1.00 per ton on complete fertilizers and rock- 

 and-potash goods. 



For agents' commission, an allowance of 20 per cent, is added to the cash 

 value of the goods ready for shipment. 



