QUESTIONS 301 



graded and practice grading different lots of cotton after the market methods 

 are learned. 



4. Cotton Insects. Obtain samples of boll-worm, and boll-weevil, each 

 in different stages of development. Place these in bottles of formalin tor study 

 from time to time. Samples showing cotton diseases may also be collected 

 and preserved either in formalin or by mounting as dried specimens. 



5. Paying Cotton Pickers. Fields of cotton may be visited and methods 

 of checking and crediting the work done by each picker should be learned. 

 Which of the methods is best? Give your reasons. 



6. Cotton Fertilizers. Calculate the yields on different plots where dif- 

 ferent fertilizers are used and where different varieties are grown. Such an 

 exercise may be used as a home project where cotton is grown. 



7. Selecting Seeds. Practice selecting seed before the main crop is har- 

 vested. 



8. Methods at Gins. Visit one or more gins and study the methods of 

 handling the incoming loads, the methods of baling, the disposal of seed, the 

 disposal or use of waste, and other features about each gin. 



9. Cottonseed Oil and Meal. If possible, visit a mill where oil is ex- 

 tracted from the cotton seed. Learn what uses are made of the oil and to 

 what markets the products are shipped. What percentage of protein is found 

 in the cottonseed meal? For what is the meal used? 



QUESTIONS 



1. Compare cotton with other fibre crops in uses and popularity. 



2. What are the chief types of cotton? . 



3. What are the differences in varieties of cotton? 



4. Give the main points to be considered in judging the cotton crop. 



5. Describe the best preparation of soil for cotton. 



6. How should good seed be selected? 



7. Give directions regarding fertilizing and cultivation to combat the boll- 



weevil. 



8. Describe the ginning and baling of cotton. 



9. What are the market classes of grades of cotton? 



10. Give full directions for combating the boll-weevil. 



11. Give the trap crop method of controlling boll-worm. 



12. Mention two cotton diseases and tell how to control them. 



References. United States Farmers' Bulletins: 36, Cotton and Its Pro- 

 ducts; 47, Insects Affecting the Cotton Plant; 48, The Manuring of Cotton; 

 209, Controlling the Boll-Weevil in Cotton Seed and at Ginneries; 211, The 

 Use of Paris Green in Controlling the Cotton Boll-Weevil; 217, Essential 

 Steps in Securing an Early Crop of Cotton; 223, Miscellaneous Cotton 

 Insects in Texas; 286, The Advantages of Planting Heavy Cotton Seed; 290, 

 The Cotton Boll-worm; 302, Sea Island Cotton; 364, A Profitable Cotton 

 Farm; 500, The Control of the Boll- Weevil; 501, Cotton Improvement Under 

 Weevil Conditions; 512, The Boll-Weevil Problem; 555, Cotton Anthracouse 

 and How to Control It; 577, Growing Egyptian Cotton in the Salt River 

 Valley, Arizona; 591, The Classification and Grading of Cotton; 601, A New 

 Method of Cotton Culture and Its Application ; 625, Cotton Wilt and Root 

 Knot; 735, Red Spider on Cotton and How to Control It. 



Comparative Spinning Tests of the Different Grades of Arizona-Egyptian 

 with Sea Island and Sakellaridis Egyptian Cotton, Bulletin 359, U. S.'Dept. 

 Agriculture. 



