34 FERTILIZERS 



The foregoing illustration shows that from a given 

 guarantee it is possible to prove whether a full ton 

 of high grade materials was used or not. It would 

 be interesting also to figure how much higher the 

 analysis would be if the amounts of blood, bone and 

 sulphate of potash were increased proportionately, 

 so that there was no room for "make weight." 



It is only fair to the dealer to say that the 484.34 

 Ibs. "make weight" is not necessarily worthless filler. 

 Low grade material may have been used. They are 

 offered in the same market with the best. Blood can 

 be so carelessly handled as to be full of floor refuse 

 and foreign matter. The source of tankage influ- 

 ences its grade. Both low and high grades are legit- 

 imately bought and sold in the same market and the 

 low grade often takes the place of "filler." To make 

 the foregoing guarantee without filler, we could 

 substitute 1150 Ibs. of Thomas slag for 666.66 Ibs. 

 of steamed bone meal so the weights would be : 

 Blood, 769 Ibs. @ 13%= 99.9 Ibs. or 5. % 



Thomas slag, 1150 " @18%=207. " or 10.25% 



8 " @50 % = 40 ' " or 2 - % 



Total 1999 Ibs., or no room for filler. 



54. If ammonia is given instead of nitrogen, you 

 can find its equivalent in nitrogen by multiplying 

 by .825%; for instance, 5.5% ammonia equals 4.54% 

 nitrogen. 



Do not confuse sulphate of potash with the actual 

 (or K2O) potash. The sulphate usually runs about 

 50% actual. So, it takes 2 pounds of sulphate to 

 make one pound actual, or 2% sulphate to make 1% 

 actual. 



