INSPECTION OF COMMERCIAL FERTILIZERS 



The foregoing fertilizer trade values are based on average wholesale quotations 

 of fertilizer chemicals and unmixed materials, as taken from trade journals for 

 six months ending March 1, 1935, to which 20 per cent has been added for over- 

 head. When appropriate, an additional allowance has also been made for bags, 

 labor and transportation. 



FERTILIZER TONNAGE. 

 Tonnage of Mixed and Unmixed Fertilizers Sold in Massachusetts. 



There were 5,564 tons more fertilizer sold in the state in 1935 than during the 

 previous year. The tonnage of mixed fertihzer was 2,752 more, and that of the 

 fertilizer chemicals and unmixed materials was 2,841 more than for 1934. Pul- 

 verized manures showed a decrease of 29 tons. Of the total tonnage sold, 67.9 

 per cent was mixed fertilizer, 29.6 per cent was unmixed materials, and 2.5 per 

 cent was dried and pulverized natural manures. 



Plant Food Tonnage. 



There were 1,435 more tons of plant food sold in the state than during 1934,, 

 of which 367 tons were nitrogen, 664 tons available phosphoric acid, and 404 

 tons potash. 



There were 12,719 tons of plant food sold, of which 28 per cent was nitrogen, 

 43 per cent available phosphoric acid, and 29 per cent potash. Mixed fertilizers 

 furnished 71 per cent of the plant food, chemicals and unmixed materials 28 per 

 cent, and pulverized manures 1 per cent. 



The three plant food elements were furnished in the following proportions by 

 the mixed fertilizers and the unmixed materials, including the pulverized manures: 

 nitrogen, 62 per cent from mixed and 38 per cent from unmixed; phosphoric acid, 

 69 per cent from mixed and 31 per cent from unmixed; potash, 83 per cent from 

 mixed and 17 per cent from unmixed. 



The following tables present tonnage figirres for one year, July 1, 1934, to July 

 1, 1935, for both mixed fertilizers and unmixed fertilizer materials. In case of 

 the mixed fertilizers the grade represents the plant food guarantee of each fertihzer 

 in the order of nitrogen, available phosphoric acid, potash. 



