94 FARM AND SCHOOL PROBLEMS. 



7. They are a successful crop on rich land. 



8. Soybeans are free of fungus diseases. 



[). Winter weather does not injure the seed. 



10. Soybeans are grown for grain, hay, silage, soiling, pasture and soil 

 enrichment. 



11. The hay is not easily damaged by rain. 



PROBLEMS. 



1. Measure the circumference of a drill wheel and find the number 

 of revolutions required in seeding 1 acre of soy beans in rows 28 inches 

 apart, seeding 3 rows at a time. 



2. Find the number of revolutions required in seeding acre in rows 

 42 inches apart. 



3. Tae average production of soybeans in Ohio is about 18 bushels. 

 per acre, and the average price of seed is $2 per bushel; how will this 

 compare in value with the average production of wheat (13 bu.) in Ohio 

 at the present price? 



4. If soybeans in the value of their composition are equal to cotton 

 seed meal or oil meal when the latter sell at $33 per ton, what is the feed- 

 ing value per acre, when soybeans yield 10 bushels per acre with soy bean 

 straw valued at $5.66 per acre for manure? 



NOTE. Soybeans weigh 60 pounds per bushel. 



5. A field has been thoroughly innoculated and produces 2 tons dry 

 soybean hay per acre and leaves 6 pounds of nitrogen in the roots and 

 stubble for every ton of soybean hay produced ; find the value of the 

 nitrogen left in a ten acre field if the cost of nitrogen as purchased in 

 commercial fertilizers is I8c per pound. 



6. Compare the value of the nitrogen left in the stubble and roots in 

 an acre of clover producing 2 tons of hay per acre and the value of the 

 nitrogen left on an acre producing a like amount of soybean hay. 



7. *Compare the value of the nitrogen left on one acre after removing 

 2 tons of alfalfa with the value of the nitrogen left after removing two 

 tons of soybean hay per acre. 



Exercises and Questions. 



1. Describe fully the two varieties of red clover. 



2. Can you distinguish all clovers by their seeds? 



3. Examine samples of clover seeds under a strong glass. 



4. Compare the cost of different legume seeds. 



5. What is the most important hay plant in U. S. ? 



6. Make a collection of all the popular grass seeds. 



* NOTE There are 35 pounds of nitrogen in 1 ton of alfalfa hay, 

 and of the nitrogen in an alfalfa plant is in the roots. 



