388 SOIL PHYSICS AND MANAGEMENT 



31. Where should corn be placed in the rotation? 



32. Where is the best place for wheat? 



33. Where are oats grown best? 



34. Where are winter oats grown? 



35. What crops may well be followed by oats? 



36. Where may rye be seeded ? 



37. What is a nurse crop and why necessary? 



38. What do cowpeas and soybeans follow? 



39. Locate the corn and winter wheat belt. 



40. What are the principal crops there ? 



41. Give a good short-cycle rotation. 



42. Give a good four-year rotation. 



43. What is the rotation if two crops of wheat are desired? 



44. Give a four-year rotation in which legumes are grown three out of 



four years. 



45. How may these be adapted to mixed farming? 



46. What is to be done if clover should fail? 



47. What is the place of soybeans or cowpeas in the rotation? 



48. How may alfalfa be included in the rotation? 



49. Locate the cotton belt. 



50. What advantages over the corn and winter wheat belt does it possess? 



51. What are the principal money crops? 



52. Name some other crops grown in this belt. 



53. Give the forage crops grown. 



54. Give a practical rotation with tobacco, cotton, rice and potatoes. 



55. What should be done with the legumes? 



56. How may these be adapted to livestock farming? 



57. Where is the hay and pasture province? 



58. What are its advantages and disadvantages? 



59. Give rotations that may be practiced. 



60. Locate the spring wheat region. 



61. Name the crops and give a rotation. 



62. What are the crops of the great plains region ? 



63. What are the important crops of the province west of the Rocky 



Mountains ? 



REFERENCES 



1 Hays, W. M., Boss, Andrew, Wilson, A. D., and Cooper, Thomas P., 



Bulletin 125, Minnesota Station, 1912, p. 36. 

 'Circular 131, Ohio Station. 



General References. Carleton, M. A., Small Grains, 1916. Liv- 

 ingston, George, Field Crop Production, 1915. Montgomery, E. G., Pro- 

 ductive Farm Crops, 1915. Piper, C. V., Forage Plants. 1914. Duggar, 

 J. F., Southern Field Crops, 1915. Parker, E. C., Field Management and 

 Crop Rotation, 1915. 



