TILLAGE 357 



15. What is the hillside plow? 



10. What are the ad vantages of the disk plowT 



17. What is the use of the lister? 



18. Describe the subsoil plow and give its use. 



19. (Jive points of difference in the kinds of harrows. 



20. What are the advantages of the disk harrow that make it so uni- 



versally used ? 



21. Why is it necessary to use coin patters? 



22. What are the objections to the drum roller? 



23. (Jive advantages of other forms of roller. 



24. What is a planker and for what used ? 



25. Describe the Campbell subsurface packer. 

 20. What are its advantages? 



27. (Jive three classes of cultivators. 



28. (Jive advantages and disadvantages of each. 



29. Which is best adapted to shallow cultivation? 



30. (Jive value of different seeders as tillage implements. 



31. (Jive four points in good plowing. 



32. What determines the time of plowing? 

 .33. What can you say about fall plowing? 



34. May the soil become too dry to plow in the full? 



35. (Jive advantages of fall plowing. 



30. What soils are most benefited by fall plowing? 



37. What are some advantages of spring plowing? 



38. What preparation should be made for spring plowing? 

 30. How deep should plowing be done? 



40. What can be said of extremely deep plowing in humid regions? 



41. Tell about the results from subsoil ing. 



42. What may be said in favor of dynamiting? 



43. What is the effect of deep rooting crops? 



44. What are the advantages of a good seed bed? 



45. What are the objections to clods? 



40. (Jive the facts in regard (o a good se<-d bed for wheat. 



47. What are the conclusions from the table page 347? 



48. How should the need bed be prepared for corn from fall-plowed land .' 

 4!). fJive method of preparing seed from spring-plowed land. 



50. Tell about seed bed for oats. 



51. What are the objects to be attained in the cultivation of a crop? 



52. Give results of weeds on yield of corn at the Illinois Station. 



53. What is the value of the mulch in growing corn as shown by crop 



yields? 



54. fJive results of the Department <>f Agriculture on cultivation of corn. 



55. What effect does root injury by cultivators have on yield of corn? 



REFERENCES 

 1 Mosier. J. G., and Gustafson. A. K.. Bulletin 181. Illinois Station. Soil 



Moisture and Tillage for Corn. 1!H">. p. 585. 

 'Call. L. K., Bulletin 18."), Kansas Station, Preparing Land for Wheat. 



1913, p. 0. 



'Illinois Bulletin 181 (as above), p. r>70. 

 4 Illinois Bulletin 181 (as alnive). p. "8-J. 

 3 Cates, J. S., and Cox, 11. K, Bulletin 2.'7. Bureau of Plant Industry. 



1 T . S. D. A., The Weed Factor in the Cultivation of Corn. 1!!2. 

 Morrow, (J. W., Results given in Illinois Bulletin 181 (as above) p. "i(!S. 



