Effect of Balls Size and Fiber Location inside the Ball on Usher Fibers Length

Abstract

The length of the Usher fibres is a effected by many factors particularly the fibre maturity, green ball size and the location in side the ball where the fibre was picked. The maturity of the fibres is determined by the colour of the seeds. Dark brown colour indicates that the fibre is fully mature and it's ready to be picked. In this research, three methods for measuring Usher fibres length were used; Individual fibre method, Comb-sorter method and The digital fibrograph method. The results obtained showed that Usher fibres are more uniform in length than cotton fibres. The calculated coefficient of variation was 15% and this clearly indicates the degree of its uniformity.