258 



KUMPTA COTTON AND ITS IMPROVEMENT 



or larger ginning percentages, and by an equal or larger staple and equal 

 strength and character of fibre. It is necessary, therefore, to determine how 

 the selection compares with the ordinary Icumpta cotton in these directions. 



So far as the ginning percentage is concerned the comparison is given 

 below :— 



The increase in ginning percentage is not very large, but it is distinct. 

 Further it is observed that the ginning percentage of the "Dharwar No. 1 '' 

 has remained very constant. Most of the samples either grown by myself or 

 grown by others have ginned between 28 and 29 per cent, of cotton lint. This 

 constancy of ginning percentage enhances the commercial value of the hapas 

 of "Dharwar No. 1," for normally the ginning percentage of kimipta cotton 

 varies a good deal. ~ _ .L_ .7. . 



The comparative constancy of the ginning percentage is shown by the 

 following figures intended to shoAv the variability of different plants in this 

 character :— 



Number of plants examined 

 Ginning percentage 26 

 „ 27 

 „ 28 

 „ 29 

 „ 30 

 31 



100 plants 



3 „ 



18 ,, 



56 „ 



12 ., 



10 „ 



1 „ 



The distribution is shown in the attached curve (Fig. 16), which may be 

 compared with that for the kumpta crop in general shown in Fig. 10. 



The average ginning percentage is 28* 1 which is identical with the mode. 

 The variation is narrow. The standard deviation is 0*301 and the co-efficient 

 of variability is O'OIOT. 



This gain in ginning percentage may be due to a greater development 

 of lint or to a decrease in tne weight of the seed. It is not. however, due U. 



