44 FARM AND SCHOOL PROBLEMS. 



ton mixture to raise the phosphoric acid content 2 per cent in a 3-8-10 

 fertilizer? 



11. Write the formula for a ton mixture of fertilizer that contains 

 300 pounds of ammonium sulphate 20%, 200 pounds of 40% acid phos- 

 phate, 100 pounds of 50% muriate of potash? 



12. Write a good formula for wheat, one for oats, one for corn, 

 one for alfalfa, and one for clover. 



13. If we wish to use 1,000 pounds of a 5-6-9 fertilizer per acre 

 for truck land, what will be the required amount of nitrate of soda 

 18%, acid phosphate 14%, and sulphate of potash 50%, for a ton mixture? 



14. For legumes such as clover, cowpeas, beans, it is desired to 

 use a 10-10 fertilizer of basic slag 15% and muriate of potash 50%; 

 what will be the number of pounds of each required in a mixture of 

 two thousand pounds? 



15. For flowering plants, mix 4 pounds of bone meal 4% nitrogen, 

 28% phos. acid, and 8% potash, with one pound of 50% sulphate of potash 

 per square rod; what is the formula? 



16. For hay fields 100 pounds of nitrate of soda 18%, 100 pounds 

 of acid phosphate 16%, and 50 pounds of muriate of potash 50% is 

 used per acre by many successful growers. What is the formula? 



PROBLEMS. 



1. To produce a quick growing, tender plant like celery, lettuce, 

 cabbage, onions, asparagras or similar plant, what will be the cost of 

 supplementing barnyard manure with 1,000 pounds of a 3-6-6 fertilizer, 

 if ground phosphate rock can be purchased @ $8 per ton, and the cost 

 of nitrogen is 17c. per pound and potassium is quoted @ 4 and one-half 

 cents a pound? 



2. To produce turnips, carrots, beets, which require soundness and 

 tenderness, a fertilizer should be used carrying 4 per cent ammonia, 

 6 per cent phosphoric acid, and 10 per cent potash ; what will be the 

 cost of this 4-6-10 fertilizer to supplement manure, if 1,000 pounds are 

 required for one acre?* 



3. Find the cost of 600 pounds of fertilizer for sweet corn, toma- 

 toes, and potatoes that require a long period for growth ; the available 



' plant food required being but 3-8-6. 



4. A prominent strawberry grower used 15 tons of manure per 

 acre, and 1,000 pounds of 1.5-10-7.5 fertilizer; find the cost of the 

 fertilizer used to reinforce the manure at the price of ingredients for 

 home -mixing. 



5. Find the cost of one ton of home mixed 3-8-10 fertilizer for 

 use in growing raspberries. 



*In problems 2, 3, 4 and 5, figure cost of nitrate of soda @ $55 per 

 ton; Acid phosphate @ $14.00 per ton; Muriate of potash @ $45.00 

 per ton. 



