150 RELATIONSHIP OFCLEAN WOOL YIELD WITH BODY WEIGHT [Vol. XXIV, Part III,
measured in inches for each ewe and the product of the length and chest girth was
taken as an index of the size of the ewe. The body weight of each ewe in pounds
was also recorded.
The correlation coefficients of the body weight with clean wool yield and that
of the body size with clean wool yield of each age group was worked out separately.
Barring the yearlings, the values of the correlation coefficients of body weight with
clean yield for the various groups were all pooled since they were found to be homo-
geneous. The values of the correlation coefficients of body size with clean wool
yield in the adults were also pooled as they also proved homogeneous on test.
In the adults the order of correlation between body weight and clean wool
yield was found to be 0.257, significant at one per cent level, while the order of
correlation between body size and clean wool yield was observed to be 0.225, signi-
ficant at one per cent level.
In the yearlings, it was observed that the body weight and the wool yield were
correlated to the order of 0.587, significant at one per cent level, which indicates
that a proportion of about 34.46 per cent of the variation in clean wool yield of
different yearlings can be attributed to the variation in body weight. The body
size and clean wool yield in the same group were found to be correlated to the order
of 0.201 which was significant at five per cent level.
The order of correlation of body weight with clean wool yield in the yearlings
being fairly high, denotes that more emphasis may be laid upon the body weight of
the yearlings at the time of selection for the replacement stock which is usually
done at the age of about 15 to 18 months. This will eventually help the breeder to
increase the productivity of the flock with regard to wool yield.
ACKNOWLEDGEMENT
The authors are highly indebted to Shri V. N. Amble, and Shri K. S. Krishnan,
of the Indian Council of Agricultural Research, New Delhi, for their valuable guidance
and help rendered in the statistical analysis of the data.
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