The BuLLETiiir. 7 



other ingredients of the fertilizer will not prevent the injurious effect 

 of the chlorine. The term potash from muriate in our analyses, there- 

 fore, means that there is sufhcient chlorine present in the fertilizer 

 from all sources to combine with the potash to the extent indicated by 

 the analyses. 



VALUATIONS. 



To have a basis for comparing the values of different fertilizer 

 materials and fertilizers, it is necessary to assign prices to the three 

 valuable constituents of fertilizers — ammonia, phosphoric acid, and 

 potash. These figures, expressing relative value per ton, are not 

 intended to represent crop-producing power, or agricultural value, but 

 are estimates of the commercial value of ammonia, phosphoric acid 

 and potash in the materials supplying them. These values are only 

 approximate, as the cost of fertilizing materials is liable to change as 

 other commercial products are, but they are believed to fairly rep- 

 resent the cost of making and putting fertilizers on the market. They 

 are based on a careful examination of trade conditions, wholesale and 

 retail, and upon quotations of manufacturers. 



Relative value per ton, or the figures showing this, represents the 

 prices on board the cars at the factory, in retail lots of five tons or 

 less, for cash. 



To make a complete fertilizer the factories have to mix together in 

 proper proportions materials containing ammonia, phosphoric acid 

 and potash. This costs something. For this reason it is thought 

 well to have two sets of valuations — one for the raw or unmixed 

 materials, such as acid phosphate, kainit, cotton-seed meal, etc., and 

 one for mixed fertilizers. 



VALUATIONS FOR 1910. 

 In Unmixed or Raw Materials. 



For phosphoric acid iu acid phosphate 4 cents per pound. 



For phosphoric acid in bone meal, basic slag, and Pe- 

 ruvian guano ^V2 cents per pound. 



For nitrogen 18 cents per pound. 



For potash 5 cents per pound. 



In Mixed Fertilizers. 



For phosphoric acid ^^2. cents per pound. 



For nitrogen 19% cents per pound. 



For potash SVa cents per pound. 



VALUATIONS FOR 1911. 



In Unmixed or Rate Materials. 



For phosphoric acid in acid phosphate 4 cents per pound. 



For phosphoric acid in bone meal, basic slag, and Pe- 

 ruvian guano 31/2 cents per pound. 



For nitrogen 19% cents per pound. 



For potasli 5 cents per pound. 



