30 BULLETIN 521^ U. S. DEPAETMENT OF AGEICtTLTURE. 



Lesson 39. — Cowpeas. 



Illustrative material : Collection of seed of different varieties of this and 

 crops which follow. 



Special references : Co-\A^eas, Farmers' Bulletin 318 ; Cowpeas in the Cot- 

 ton Belt, Office of Secretary of Agriculture Special Circular. 



Lesson 40. — Soy Beans. 



Special reference : Soy Beans, Farmers' Bulletin 372. 

 Lesson ^1.— Field Peas and Beans. 



Special references. — The following Farmers' Bulletins : 224, Canadian 

 Field Peas; 289, Beans. 



Lesson 42. — Peanuts. 



Special reference : The Peanut, Farmers' Bulletin 431. 

 Lessons 43 and 44. — The Clovers. 



Bur, red, crimson, alsike, white, sweet, and any other clovers of 

 local importance. 



Illustrative material : Mounted specimens of fresh plants of all varieties 

 of clover. Samples of seed of each variety. Same for forage plants 

 which follow. 

 Special references. — The following Farmers' Bulletins: 123, Red Clover 

 Seed ; 441, Lespedeza, or Japan Clover ; 455, Red Clover ; 485, Sweet 

 Clover ; 550, Crimson Clover : Growing the Crop ; 579, Crimson Clover : 

 Utilization ; 646, Crimson Clover : Seed Production ; 693, Bur Clover ; 

 730, Button Clover. 



Lesson 45. — Vetches. 



Special references : Hairy Vetch for the Cotton Belt, Office of Secretary 

 of Agriculture Special Circular. The following Farmers' Bulletins : 

 515, Vetches ; 529, Vetch Growing in the South Atlantic States. 



Lessons 46 and 47. — Alfalfa. 



Special references. — The following Farmers' Bulletins. 339, Alfalfa ; 494, 

 Alfalfa Seed Production. 



Exercise 32.- — Legume Inoculation. 



Purpose: To give students practice in proper methods of inocula- 

 tion. 



Directions: While this exercise may be conducted wdth seed sown 

 in flats in the laboratory, it will have greater value if conducted in 

 connection with the seeding of alfalfa or any of the clovers on the 

 school farm or the farm of a neighboring patron. In a district where 

 any legume which gives promise has not been grown extensively a 

 demonstration may be carried out with profit upon plats treated as 

 follows: (1) Without inoculation, (2) inoculated by the soil-transfer 

 method, and (3) inoculated by the pure-culture method. Directions 

 for applying these methods may be obtained from the United States 

 Department of Agriculture, Bureau of Plant Industry Circular 63, 

 Methods of Legume Inoculation, or from the Farmers' Bulletins 

 which treat the growing of the specific crop. Pure cultures for 



