66 FIELD CROPS FOR THE COTTON-BELT 



amount of training and experience necessary to produce 

 desirable results from hybridization, the advisability of 

 anyone except the experienced breeder attempting this 

 method is very doubtful. The mere matter of successfully 

 crossing two varieties means httle. The progeny of this 

 cross must be carefully studied and selected for a number 

 of years in most cases before anything of real value is 

 obtained. 



77. Acclimatization. — The method of improving cot- 

 ton by means of acclimatization is probably the least hope- 

 ful, especially when the introductions are brought direct 

 from remote regions with widely different climatic and 

 other conditions. For this reason this method shotild be 

 employed only after a careful study of the environment 

 of the original and the proposed new country or locality 

 of production. However, results of considerable value 

 have been obtained at least partially by means of this 

 method. A noteworthy example is the successful produc-' 

 tion of several varieties of Egyptian cotton in certain 

 sections of Arizona, New Mexico, and California. 



