ANNUAL REPORT, 1931 223 



Brands Brands Samples Number Number of 



Products Regis- Col- Col- of Determin- 



tered lected lected Analyses tions 



Mixed fertilizers 357 344 1207 467 6071* 



Ground bone, tankage and fish 56 50 165 65 301 



Nitrogen products, organic and mineral 71 64 270 177 531 



Phosphoric acid products 31 27 117 32 128 



Potash products 21 21 72 32 116 



Cotton hull ashes and wood ashes 9 8 12 11 46 



Ammoniated superphosphates 4 4 5 4 40 



Nitrate of potash 7 6 12 9 36 



Dried, pulverized natural manures 23 23 94 22 110 



Peat products 7 7 10 6 30 



Miscellaneous 3 3 i) 4 23 



Lime products 26 26 68 27 190 



Totals 615 583 2041 856 7622 



* Not counting check tests or repeats, which would amount to at least one-third more in number. 



From July 1, 1930, to July 1, 1931, the tonnage of fertilizer and plant food 

 sold in Massachusetts was as follows: 



Plant Food Elements (Tons) 

 Fertilizer Available 



(Tons) Nitrogen Phosphoric Potash 



Acid 



Mixed fertilizers 43,463 1,916 3,473 2,827 



Unmixed fertilizer chemicals and 



materials 19,174 1,084 1,630 561 



Pulverized natural manures 2,426 42 30 87 



Totals 65,063 3,042 5,133 3,475 



Full details of the fertilizer and lime inspection will be found in Bulletins 

 60 and 61, Control Series. 



Miscellaneous Analytical Work. (H. D. Haskins, H. R. DeRose, A. F. 

 Spelman, and G. J. Larsinos). The cooperative chemical work which was car- 

 ried on with other departments of the Experiment Station covered the usual 

 range of projects and comprised the following analyses: 



Cured hay, partial ash analysis 53 



Pasture grass, partial ash analysis 22 



Peat, fertilizer analysis 2 



Farm manures 4 



Complete fertilizers 6 



Unmixed fertilizer materials 23 



Ashes of peat 1 



Charcoal 2 



Iron sulfate 2 



Soils, special study tobacco root-rot 12 



Soils, mechanical analysis 12 



Soils, partial analysis 4 



Requests for analyses from farmers and farm organizations have received the 

 usual attention. A nominal charge has been made for such work when of interest 

 only to the individual. Results of analysis are always interpreted and sugges- 

 tions are made as to the practical application of the work. The following ma- 

 terials have been examined under this heading: 



