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Whitman & Pratt Rendering Co. 



' Ammoniated superphosphate. 



THE ECONOMICAL PURCHASE OF COMMERCIAL FERTILIZERS. 



From the statistics given in this bulletin with reference to the number of 

 brands and the tonnage of low-analysis goods sold during the past season, 

 together with the increased cost of the plant food which such brands of fertilizer 

 furnish, it is evident that much fertilizer is not economically purchased by the 

 Massachusetts farmer. It is not always an easy matter to select the best fer- 

 tilizer or to make the most economical purchase for the reason that there are 

 so many varying conditions from season to season. A formula having the 

 same analysis and made up of the same crude stock materials and chemicals 

 may not give the same degree of satisfaction in two consecutive years unless 

 the two seasons are similar in rainfall, temperature and sunshine. The condi- 

 tion of the trade cannot but have an important effect on the economical pur- 

 chase of fertilizers. The writer has known seasons when the price for mixed 

 fertilizers, which is usually established to hold through the winter and spring 

 months up to July 1 , has made it possible for a purchaser to buy his plant food 

 for less mone^' in this form than from unmixed chemicals and crude stock ma- 



