P'ERTILIZERS AND AGRICULTURAL LIME 



13 



Aside from the economic one, there is another factor involved. To many 

 gardeners ground bone has come to m_ean, besides a good source of plant food, a 

 fertilizer that is "safe" or "fool-proof". That is, it may be mixed with soil in 

 almost any concentration without injuring the roots of plants set in that soil. 

 This quality of pure bone meal is especially prized by many florists in potting 

 plants. Mixtures containing soluble inorganic or synthetic organic salts cannot 

 be used in like manner without risk of plant injury. 



PHOSPHORIC ACID COMPOUNDS 



Manufacturer and Brand 



American Agricultural Chemical Co. 



18' ; Normal Superphosphate 



18'.; Xornial Superpho;-phate 



Apolhecaries Hall (Jo. 



Superphosphate ?0'~c 



Armour Fertilizer Works 



Armour's Big Crop Superphosphate 20% . . . . 



Consolidated Rendering Co. 



Corenco Superphosphate 20% 



Davison Chemical Corporation 



Davco Granulated Superphosphate 20% 



Eastern States Farmers' Exchange, Inc. 



Eastern States Superphosphate 20% 



Eastern States Superphosphate 20% 



International Minerals & Chemical Corporation 



International 20' 7 Superphosphate 



International 20' i Superphosphate 



International 20' ; Superphosphate 



International 20< < Superphosphate (a) 



Old Deerfield Fertilizer Co.. Inc. 



Old Deerfield Superphosphate 20% 



Rogers & Hubbard Co. 



Hubbard 20';^, Superphosphate 



Total 

 Phos- 

 phoric 

 Acid 



18.99 

 19.04 



21 ,S1 

 21 41 

 21 06 

 21.61 



20 35 



21 .72 



21.66 

 21.51 

 21.51 

 21 .21 



20.45 

 20 00 



.Available 

 Phosphoric Acid 



Found 



1,"^ 00 

 18.04 



20 SI 



21 .41 



20 28 

 20 71 



20 21 



21 36 



20.16 

 20.31 

 20 . 03 

 20 13 



20 U 

 20 00 



Gua:an- 

 teed 



IS 00 

 IS 00 



30 00 

 20 00 

 20 00 

 20 00 



20 00 

 20.00 



20 00 

 20 00 

 20 00 

 20.00 



20 00 

 20 00 



Brand Showing Commercial Shortage of More than $1 per Ton 



International Minerals <£ Chemical Corporation 



International 20' ^ Superphosphate 



a Composite of 3 samples. 



b Commercial shortase. S2.31 per ton. 



