FIGURING FERTILIZERS 



61 



and 1.78 per cent is derived from organic forms. Of the total phos- 

 phoric acid, 6 per cent is soluble, 2 per cent reverted, and 1 per cent is 

 insoluble ; of the total potash, 3 per cent is derived from muriate and 

 3 per cent from sulfate. 



The first column in Table A shows the percentage of the constituents 

 contained, which, multiplied by 20, gives the pounds per ton in the 

 second column, which, multiplied by the schedule prices per pound, 

 gives the valuation per ton, as shown in the fourth column. 



In the case of ground bone, the guarantee is 4 per cent ammonia and 

 48 per cent bone phosphate, which are equivalent to 3.28 per cent nitro- 

 gen and 22 per cent phosphoric acid. It is assumed that 60 per cent 

 of the material is finer than -^V of an inch, and is regarded as "fine," 

 and 40 per cent is coarser than -h of an inch, and is regarded as 

 " coarse." 



Table A. — Complete Fertilizer 



Per cent or 

 pounds per 100 



2 3 4 



v„i,.„ ^„^ Estimated 

 Pounds ^^^^S value per 

 per ton ^ JSs *°^ ^^ ^^'^^ 



Nitrogen, as nitrates 

 Nitrogen, as ammonia salts 

 Nitrogen, as organic matter 



Total nitrogen . . . 

 Phosphoric acid, soluble 

 Phosphoric acid, reverted 

 Phosphoric acid, insoluble 



Total phosphoric acid 

 Potash, as muriate . . 

 Potash, as sulfate . . 



Total potash . . . 



1.00 X 20 

 0.50 X 20 

 1.78 X 20 

 3.28 



6.00 X 20 

 2.00 X 20 

 1.00 X 20 

 9.00 



3.00 X 20 

 3.00 X 20 

 6.00 



20.0 X 16.5 



10.0 X 17.5 



35.6 X 18.5 



65.6 

 120.0 X 



40.0 X 



20.0 X 

 180.0 



60.0 X 



60.0 X 

 120.0 



4.5 

 4.5 

 2.0 



4.25 

 5.0 



constituent 

 : $3.30 



: 1.75 



: 6.59 



$5.40 

 1.80 

 0.40 



5 



Total 



estimated 



value 



per ton 



$11.64 



2.55 

 3.00 



7.60 



5.55 



$24.79 



Table B. — Ground Bone 



Per cent 



or 

 pounds 

 per 100 



Per cent 



of 

 fineness 



Nitroeenl 3.28X00 

 JNitrogenj 328 x 40 



Total . 

 Phosphoric f 22.00 X 60 

 acid 1 22.00 X 40 

 Total . 



Per cent 



or pounds 



per 100 



Pounds 

 per ton 



= 1.97 in fine X 20 ^ 

 = 1.31 in coarse X 20 ■ 



3.28 

 = 13.20 in fine X 20 



Value 



per 

 pound, 

 cents 



39.40 X 18.0 = 

 26.20 X 13.0 = 

 65.60 

 264.00 X 



8.80 in coarse X 20 = 176.00 X 

 22.00 440.00 



4.0 = 

 3.0 = 



6 7 



Esti- 

 mated Total 



value esti- 



per ton mated 



of each value 



con- per ton 

 stituent 



$7.09 

 3.41 



$10.50 

 10.56 

 5.28 



15.84 

 $26.34 



