Last update: April 4, 2012 02:47:04 PM E-mail Print

 

Seasonal effect on weathering of wool

C. H. STEENKAMP, J. J. VENTER and W. K. EDWARDS

 Research Institute of the Karoo Region, Middelburg, Cape Province


ABSTRACT

Two groups of twelve Merino ewes were used to investigate the weathering of wool after shearing and the effect of season thereon. Group I was shorn at the beginning of December 1967 and Group II at the beginning of May 1968. Wool samples were taken and analysed each month for 13 months. Methylene blue absorption was used to determine the degree of weathering. The monthly weathering index showed correlations of 0.89, 0.81 and 0.92 respectively with temperature, hours of sunshine and daylight length. Rainfall apparently had no effect on the degree of weathering. Time of shearing had a pronounced effect on the weathering pattern. Shorter wool was more resistant to weathering deeper into the staple than long wool. Evidence was found that weathered wool can recover during the cooler season.

 

Published

Agroanimalia 2(3)