APPENDIX. 



The supposed deterioration of types of cottons in cultivation. 



During the course of the work described in the foregoing paper, the 

 question frequently arose as to whether a type of cotton will deteriorate when 

 grown in conditions which are not those in which it is normally found. The 

 specific case was that of the successful attempt made some fifteen years ago to 

 introduce broach cotton cultivation into the Jcumpta tract. That cultivation 

 has been very successful in a limited area. The principal advantage of the 

 broach type has been, however, the greater ginnmg percentage of the Jcapas 

 combined with a staple equal to kumpta, and a lint very much better in colour 

 and general appearance. It has been found, however, that unless fresh seed 

 is constantly introduced from Gujarat, the cotton grown rapidly loses its 

 advantages. The ginning percentage declines, the colour is lost. This has 

 been ascribed to deterioration of the cotton owing to its being grown under 

 conditions to which it is not accustomed. It may, however, equally well be 

 due to cross fertilization with the local cotton. It is obvious that an exami- 

 nation of this case might give results of wider interest in studying the general 

 question of deterioration. 



The actual change in the ginning percentage of broach cotton kapas on 

 growing at Dharwar is shown in the following table. Fresh seed was obtained 

 every year, but at the same time the Dharwar-grown seed was also sown. 

 Thus we can give the ginning percentage of seed which has been gTown at 

 Dharwar for almost any number of generations up to thirteen. The results 

 are quoted for three years, 1914, 1915 and 1916 :^ 



