الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
A study was conducted at Sakha Expt. Sta. in 1974-1975 to investigate the effect of light and temperature on the seasonal changes in wool growth as well as on the percentage of fibre shedding.
Thirty nine rams ranging between 3-4 years of age and representing 5 breed groups, viz, Ossimi, 3/4 Ossimi.; 3/4Merino, 1/2 ossimi. 1/2 merino, 1/4 Ossimi. 3/4 Merino and Merino were included in the study. The rams were devided into two groups; one group included 20 rams and was put under constant dim light conditions all the year round while the other group included 19 rams was left under the normal day light-night darkness rhythm all over the year. Diet was also constant through the year. The results indicated that highly significant differences in fibre length were found between breeds and seasons with a highly significant breed x season interaction. The breed treatment interaction was also significant while the effect of treatment was non-significant no significant breed x season of breed x season x treatment interactions were observed. Highly significant breed differences were found in fibre diameter, with a highly significant breed x light treatment interaction. The effect light treatment on fibre diameter was significant although the significance level varied between the different breeds. Breed x season, treatment x season and breed x season x treatment interactions were all non-significant. Highly significant differences were found between breeds, seasons and between treatments in the percentage of
fibre shedding. A highly significant breed x season interaction was also noticed. No significant breed x treatment, season x treatment and breed x season x treatment interactions were found to affect the percentage of fibre shedding.