40 BULLETIN 132, U. S. DEPARTMENT OF AGRICULTURE. 



5. Find the value of the elements in a ton of cottonseed meal at the prices mentioned 

 in problem 2. 



6. Find the amounts of 16 per cent phosphate, 19i per cent nitrate of soda, and 12 

 per cent kainit required to compound a ton of 9:2:4 goods. What amount of filler 

 will be required to complete the ton? 



7. Find the amounts of 14 per cent phosphate, 2:7:1^ cottonseed meal, and 50 per 

 cent muriate of potash required to make a ton of 8:3:3 goods. 



FEBRUARY. 



1. Spraying materials usually cost as follows: Lime, 1 cent per pound; copper sul- 

 phate, 10 cents per pound; Paris green, 30 cents per pound; arsenate of lead, 15 cents 

 per pound; kerosene, 13 cents a gallon; hard soap, 10 cents per pound; lime-sulphur 

 mixture, 15 cents per gallon. 



2. Find the cost of the following formula: 



5 pounds lime 



5 pounds copper sulphate 



50 gallons water 



Total 



3. Find the cost of the following formula: 



2 gallons kerosene 



1 pound hard soap 



1 gallon water 



Total 



i. Find the cost of the following formula: 



3 pounds arsenate of lead 



50 gallons water 



Total 



5. If it takes three applications of 2 pounds of arsenate of lead and three days' time, 

 at $1.25 per day, to destroy the Colorado beetles on an acre of potatoes, how many 

 bushels of potatoes, at 50 cents per bushel, will be required to pay for the treatments? 



6. A boy failed to select and test the vitality of Ms seed corn and secured only 

 three-fourths of a regular stand. His yield was 60 bushels. What should it have been 

 if his stand had been regular? 



7. If two days had been required to select and test the corn seed in problem 6 and 

 thereby secure a regular stand, what would have been the value of the boy's time 

 per day? 



MARCH. 



1. For the school garden plats 15 girls want 10 tomato plants each, and the plants 

 should stand H inches each way, what should be the area of the cold frame? 



2. Determine the cost of such a frame. 



3. What would be each girl's share of the cost? 



4. A boy who is a member of both corn and pig clubs follows a 3-year rotation course 

 with 3 acres of land. To utilize his grazing crop each year it is necessary for Mm to 

 have a portable hog fence of sufficient length to inclose an acre. If it requires 60 

 rods of fence at 35 cents per rod and 80 posts at 10 cents apiece to construct the fence, 

 what will be the cost of material? 



5. If the above boy's temporary pea pasture will support a sow and six pigs, what 

 will each of the pigs have to bring at 10 weeks old to pay for his temporary fence? 



APRIL. 



1. In a 3-year rotation course of corn, cotton, and oats and peas, one-fourth ton of 

 stubble and one-fourth ton of pea vines are turned under. What is the fertilizing 

 value if 1 ton of pea vine provides 40 pounds nitrogen, 10 pounds phosphoric acid, 



