New York Agricultural Experiment Station. 393 

 INTRODUCTION. 



NUMBER AND KINDS OF FERTILIZERS COLLECTED. 



During the year 1901, the Station's collecting agents visited 

 179 towns between April 5 and October 16, obtaining 963 

 samples of commercial fertilizers. These samples represent 465 

 different brands, the product of 60 different manufacturers, each 

 manufacturer being represented by from one to 202 brands. 



The subjoined tabulated statement indicates the different 

 classes included in the collection. 



Classes of Fertilizers Collected. 



Brands con- Brands con- 

 Brands con- tainingnitro- taining phoa- 

 Brands con- tainiug only Brands con- gen and pbos- pboricacid and Brands of 

 taining only pbospboric taining only phoric acid potash with- complete 

 nitrogen. acid. potash. without potash, out nitrogen. fertilizers. 



15 35 11 21 49 334 



COMPOSITION OF FERTILIZERS COLLECTED. 



The following tabulated statement shows the average com- 

 position of the complete fertilizers collected during the year, 

 together with a comparison of the guaranteed composition and 

 that found by analysis. 



Average Comeosition of Complete Fertilizers Collected. 



Averaga 

 per ct. 

 found 

 Per ct. guaranteed. Per ct. found. above 



/ • , , . guaran- 



Lowest. Highest. Average. Lowest. Highest Average, toe. 



Nitrogen 0.39 8.78 1.89 0.36 8.10 2.01 0.12 



Available phosplioric 



acid 0.62 12.00 7.67 1.01 13.46 8.80 1.13 



Insoluble phosphoric 



acid 0.00 6.10 2.32 



Potash 0.75 12.00 4.13 0.26 11.59 4.47 0.34 



Water-soluble nitrogen 0.00 6.40 0.87 



Water-soluble phos- 

 phoric acid O.OO 10.77 5.04 



TRADE- VALUES OF PLANT-FOOD ELEMENTS IN RAW MATERIALS AND 



CHEMICALS. 



The trade-values in the following schedule have been agreed 

 upon by the Experiment Stations of Massachusetts, Rhode 

 Island, Connecticut, New York, New Jersey and Vermont, as a 



