Dec, 1932] fertilizer inspection, 1932 5 



UNIFORMITY IN GUARANTEES 



The movement for national uniformity in stating fertili- 

 zer guarantees has made rapid progress. There are now 

 not more than four states which have not adopted the 

 proposed method. The changes were sponsored not only 

 by the state officials charged with the enforcement of the 

 fertilizer laws but also by the National Fertilizer Asso- 

 ciation, the leading agricultural papers and the Associa- 

 tion of Official Agricultural Chemists. The principal 

 changes which have been put into effect were those pro- 

 posed in last year's bulletin as follows : 



1. When fertilizers are registered with the state 

 fertilizer control official the guaranty shall be stated 

 in terms of nitrogen and not in terms of ammonia. 



'& v 



2. Grades or analyses of mixed fertilizers shall be 

 expressed in whole units and not in fractions or 

 decimals. 



3. Trade or brand names shall include the numerals 

 giving the minimum percentage of each plant food in 

 the order — nitrogen, available phosphoric acid, and 

 potash. 



Results of the change already apparent are the elimina- 

 tion of fractional guarantees, a fractional increase in the 

 amount of nitrogen in many brands and a decrease in the 

 uneconomical multiplicity of grades. 



In the tabulation of the analyses in the following pages 

 deficiencies of two-tenths of one per cent or more are 

 shown in bold-faced type. The names of the manufac- 

 turers are arranged alphabetically, and under the manu- 

 facturer the different brands are arranged alphabetically 

 or numerically by formula. 



