INSPECTION OF COMMERCIAL FERTILIZERS 5 



The foregoing fertilizer trade values are based on average wholesale quota- 

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

 for six months ending March 1, 1936, to which 20 per cent has been added for 

 overhead. 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 1,273 tons more fertilizer sold- in the state in 1936 than during 

 the previous year. The tonnage of mixed fertilizer was 770 more, and that of 

 the fertilizer chemicals and unmixed materials was 454 more than for 1935. 

 Pulverized manures showed an increase of 49 tons. Of the total tonnage sold, 

 67.7 per cent was mixed fertilizer, 29.7 per cent was unmixed materials, and 

 2.6 per cent was dried and pulverized natural manures. 



Plant Food Tonnage. 



* Does not include plant food tonnage of 510 tons of fertilizer mixed for special orders. 



There were 175 more tons of plant food sold in the state than during 1935, 

 of which 87 tons were nitrogen and 139 tons potash: the available phosphoric 

 acid showed a decrease of 51 tons. 



There were 12,894 tons of plant food sold, of which 28 per cent was nitrogen, 

 42 per cent available phosphoric acid, and 30 per cent potash. Mixed fertilizers 

 furnished 70 per cent of the plant food, chemicals and unmixed materials 29 

 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, 61 per cent from mixed and 39 per cent from unmixed; 

 phosphoric acid, 69 per cent from mixed and 31 per cent from unmixed; potash, 

 81 per cent from mixed and 19 per cent from unmixed. 



The following tables present tonnage figures for one year, July 1, 1935, to 

 July 1, 1936, for both mixed fertilizers and unmixed fertilizer materials. In 

 case of the mixed fertilizers the grade represents the plant food guarantee of 

 each fertilizer and is expressed in the order of nitrogen, available phosphoric 

 acid, potash. 



