MISCELLANEOUS PROBLEMS. 245 



or one analyzing 8 per cent phosphoric acid, 3 per cent 

 nitrogen, and 3 per cent potash. The ingredients used 

 are acid phosphate, sulphate of ammonia, and kainit. How 

 many pounds of each of these will be needed to make a 

 ton of the mixture that is to be an 8-3-3 fertilizer? 



11. What is the value of this fertilizer mentioned in 

 Problem 10, on basis of plant food if nitrogen costs 20 

 cents, phosphoric acid 5 cents, and potash 5 cents each a 

 pound ? 



12. What is the money value of a fertilizer that ana- 

 lyzes 7-3-4? 



13. What is the money value of a ton of fertilizer 

 composed of 1,600 pounds of acid phosphate and 400 

 pounds of kainit? 



14. Of another fertilizer that contains 1,600 pounds 

 of acid phosphate and 400 pounds of muriate of potash? 



15. Of another one that contains 1,600 pounds of acid 

 phosphate, 200 pounds of kainit, and 200 pounds of muri- 

 ate of potash ? 



16. A fertilizer agent tries to induce this farmer to 

 purchase a new fertilizer analyzing 2.4 per cent of am- 

 monia, 9 per cent of phosphoric acid, and 2 per cent of 

 potash. What is this fertilizer worth a ton? 



17. A neighbor farmer has been using a fertilizer con- 

 taining 8^ per cent of phosphoric acid, 1 per cent of 

 nitrogen, and 2 per cent of potash. The cost is $25 a ton. 

 Another neighbor uses a fertilizer that costs $26 a ton 

 but analyzes 5 per cent phosphoric acid, 3 per cent nitro- 

 gen, and 1^2 per cent potash. In which fertilizer is the 

 more plant food secured? 



18. If the price of the fertilizer that sells for $25 a 



