REVIEW QUESTIONS 413 



(6) climates, (c) rotations, (d) uses, (e) after growth, (/) methods 

 and rate of seeding, (g) harvesting. 



V. Give the life histories of the insect enemies of clovers. 

 How may they be controlled ? 



CHAPTER XV 



I. Discuss the history of alfalfa as a farm crop. 



II. Discuss alfalfa with respect to (a) extent and develop- 

 ment of root system, (6) stems and leaves, (c) flowers and seeds, 

 (d) varieties. 



III. What can you say of the distribution of alfalfa in (a) Eu- 

 rope ? (6) South America ? (c) The United States ? 



IV. What are its climatic adaptations? Discuss fully its 

 adaptation to soils. 



V. What are the principal uses of alfalfa? Why is it con- 

 sidered a valuable and profitable crop? Does it lend itself to 

 short rotations ? 



VI. Discuss the cultural methods of alfalfa with respect to 

 (a) preparing the land, (6) time of seeding, (c} rate of seeding, 

 (d) use of nurse crop, (e} cultivation, (/) time of cutting for hay, 

 (g) use as pasture, (h) cutting for seed, (i) yield of hay and seed. 



CHAPTER XVI 



I. Compare the two vetches with respect to (a) botanical 

 characteristics of plant and seed, (6) cultural methods, 

 (c) length of life, (d) distribution, (e) adaptation, (/) uses. 



II. Give the botanical characteristics of the two sweet clovers. 

 Discuss them with respect to (a) adaptation, (6) uses, (c) cul- 

 tural methods. 



III. Where are the following legumes grown, and of what 

 importance are they in those localities : (a) Japan clover, (6) 

 bur clover? 



CHAPTER XVII 



I. Compare the soy bean with the cowpea in respect to the 

 following : (a) history, (6) botanical characteristics of root, 

 stem, leaves and flowers, (c) varieties, (d) distribution, (e) adapta- 

 tion to soils and climates, (/) uses. 



