FERTILIZERS. 43 



RANGE OF PRICES OF RAW MATERIALS. 



Nitrate of Soda $55 00 $.62 00 



Sulphate of Ammonia 65 00 75 00 



Acid Phosphate 16 per cent 12 00 16 00 



Muriate of Potash 45 00 48 00 



Sulphate of Potash 54 00 60 00 



Kainit 15 00 18 00 



NOTE: Lime should never be mixed with any fertilizer. 



PROBLEMS. 



Given the formula and composition of the material, mixing 

 fertilizers are simple problems in arithmetic. 



1. Mix the equivalent of a ton of potato fertilizer having an 

 analysis of ammonia 3 per cent, available phosphoric acid 6 per cent, 

 potash soluble in water 10 per cent; how much nitrate of soda 18 per 

 cent ammonia, acid phosphate 14 per cent phosphoric acid and sulphate 

 of potash 50 per cent potash will be required? 



2 Suppose we wish to derive the ammonia required in problem 1, 

 from three sources, for instance, one-third from sulphate of ammonia, 

 25%, one-third from tankage 7%, and one-third from nitrate of soda, 

 18%, how many pounds of each would be required? 



3. A southern planter wished to derive his nitrogen from cotton 

 seed meal 6 per cent nitrogen, sulphate of potash 50 per cent potash, 

 Tennessee phosphate rock 30 per cent phosphoric acid; what amount 

 of each will 'be required for one ton of 9-6-10 fertilizer? 



4. A cotton planter wishes to mix the equivalent of a ton of 

 cotton fertilizer as recommended Iby the U. S. Department of Agricul- 

 ture for a sandy soil, a-3. 6-8-5 fertilizer; how much cotton-seed meal 5% 

 acid phosphate 14%, and muriate of potash 50% will be required? 



5. Suppose that we wish to mix the equivalent of a ton of 10-2-2 

 fertilizer calculate the amount of 14 per cent acid phosphate, 7.5 per 

 cent cotton-seed meal and 12 per cent kainit that will be required? 



6. Calculate a mixture same as in problem 5, except use 18% basic 

 slag instead of acid phosphate. 



7. An excellent mixture for small grain to be followed by clover 

 or grass, is 50 per cent muriate of potash 400 pounds; what is the for- 

 mula? 



8. Suppose we wish to raise the potash content of 1 ton -2-8-2 fer- 

 tilizer, to a 2-8-8 fertilizer, for corn, how much 50 per cent muriate of 

 potash will have to be added? 



9. On the basis of one ton, how many pounds of muriate of potash 

 or sulphate of potash (each 50 per cent) will be required to increase the 

 potash content 1 per cent in a 2-8-2 fertilizer? 



10. How much 30% phosphate rock (ground), must be added to a 



