230 THE ESSENTIALS OF AGRICULTURE 



11. Where did rape originate, and what other plants does it resemble? 



12. How and when should rape be sown so as to secure the best results ? 



13. What are the chief uses of millet? 



14. To what extent are the crop plants mentioned in this chapter grown 

 in your country ? 



EXERCISES 



1. Compare full-grown stalks of amber and of orange or sumac 

 sorgo; also of kafir and milo. Count the leaves on each. Cut the 

 stems and note the difference in quantity and sweetness of juice. 

 Note the degree of maturity of the leaves of each crop when the 

 grain is ripe. 



2. Study heads of amber and of orange or sumac sorgo, of kafir, 

 of milo, and of broom corn. Thresh a head of kafir or milo, weigh 

 the seed, and calculate the number of seeds. 



3. If your vicinity is one in which sorghum is grown for use in 

 making sirup, secure the exact measurements of the size of several 

 sorghum patches, also the yield in sirup from each one, and determine 

 the average acre-yield in your locality. 



REFERENCES 



BORMAN, T. A. Sorghums. The Kansas Farmer Company, Topeka. 



HUNT, T. F. Forage and Fiber Crops in America, pp. 1-274. Orange 

 Judd Company. 



SHAW, THOMAS. Forage Crops other than Grasses. Orange Judd Company. 



VOORHEES, E. B. Forage Crops for Soiling, Silage, Hay, and Pastures. 



Best Sweet Sorghums for Forage, Bulletin 438, United States Department 

 of Agriculture. 



Forage Crops for Hogs in Kansas and Oklahoma, Bulletin jji, United 

 States Department of Agriculture. 



Saccharine Sorghums for Forage, Bulletin 246, United States Department 

 of Agriculture. 



Forage Crops for the Cotton Regions, Bulletin 509, United States Depart- 

 ment of Agriculture. 



