CROPS AND SOIL IMPROVEMENT 



of analysis that must be placed upon the fertilizer 

 bag. It is added to confuse the buyer and mislead 

 him regarding actual value. The following state- 

 ment is an example of this practice : 



ANALYSIS 



PUB CENT 



Nitrogen 0.82 to 1.00 



Equal to ammonia 1.00 to 2.00 



Soluble phosphoric acid 6.00 to 7.00 



Reverted 2.00 to 3.00 



Available 8.00 to 10.00 



Insoluble 1.00 to 2.00 



Total 9.00 to 12.00 



Potash (actual) 1.00 to 2.00 



Equal to sulphate of potash 2.00 to 3.00 



As the row of larger figures is not guaranteed 

 percentages, it has no value. 



The buyer is not concerned regarding the amount 

 of ammonia to which the nitrogen is equal, and 

 so the second line is a needless repetition. 



The fifth line gives the sum of the third and 

 fourth, the available being the total of the soluble 

 and reverted. Therefore the third and fourth 

 lines may be ignored. 



The sixth line gives the percentage of unavail- 

 able phosphoric acid in the rock, and should be 



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