USING CHEMICAL MANURES INTELLIGENTLY 243 



therefore a better fertilizer, but let us see, calculating as 

 we did before : 



Nitrogen 2X20 = 40 Ibs. at 15 cents = $6.00 

 Phosphorus 9X20180 Ibs. at 5 cents = 9.00 

 Potassium 2X20 = 40 Ibs. at 5.4 cents = 2.16 



Value of plant food in a ton 



$17.16 



Now you have your comparison : If you take the first 

 fertilizer, you get in each ton $13.96 worth of plant food, 

 which costs you $30; if, 

 on the other hand, you 

 purchase the second, you 

 get $17.16 worth of plant 

 food for $29. The differ- 

 ence between the value of 

 the plant food and the sell- 

 ing price is due to the cost 

 of manufacture, profits, 

 agents' commission, etc. 

 In the case of the first this 

 difference is $16.04, while 

 in the second it is but 

 $11.84; a clear saving of 

 $4.20 on each ton, and the 

 latter is equal to the for- 

 mer in every sense of the 

 word. 



Analysis on bags and 



MOISTURE JO to 15* 



AMMONIA 2toZ25* \ 



AVAILABLE PHOS AGO 8to9% 



EQUIVALENT TO BONE PHOSPHATE 



OF UME 20.74toa4.OI* 5 



INSOLUBLE PHOS.ACJO L25to2.%j 



TOTAL PHOS.ACK) 9.25 toll* j 



POTASH Ij62to2.l6%j 



EQUIVALENT TO SULPHATEJtBOfol3.72i 



THE REAL MEANING 



PHOSPHOROUS Z.%. 



NITROGEN. 



sacks. --In purchasing a THE BAG AND THE PLANT FOOD IN IT 

 fertilizer make it a point to 



interpret as correctly as you can the statements and 

 figures that go with the fertilizer, for unless you do this 

 you may be deceived. Just bear in mind all the time that 



