CONTROL SERIES NO. 114 



Of the 254 brands analyzed, 127, or 50 percent, showed no deficiencies, 

 of 779 plant food guarantees made, 80 percent were fully maintained. 

 The deficiency table shows the following statistics: 

 Deficiencies not exceeding }-i of one percent, 108 

 Deficiencies between 3^4 and }/& of one percent, 26 

 Deficiencies between 3-1? and % of one percent, 8 

 Deficiencies more than % of one percent, 14 



Out 



Average Variation from Guaranteed Analysis 



Fourteen firms have registered five or more brands of mixed fertilizers. On 

 the basis of composition found by analysis as well as of tonnage sold, the follow- 

 ing table shows to what extent each manufacturer was successful in avoiding de- 

 ficiencies in plant food guarantees in his mixtures. Four of the fourteen firms have 

 an average deficiency in one or more plant food elements. 



