Abstract:
A uniformity trial in brinjal (Solatium melongena L). was conducted at
main campus of the Kerala Agricultural University, Vellanikkara, during the third
crop season, 1980. Observations on yield, number of fruits and primary branches
were recorded. The variability among plots of different sizes and shapes was
determined by calculating coefficient of variation (CV). It was observed that an
increase in the plot size in either direction decreased the CV. But decrease was
more rapid along N-S direction. Long and narrow plots showed lower CV than
approximately square plots.
The observed relation between plot sizes and variance was in conformity
with Smith's variance law. At larger plot sizes the regression line showed a
tendency to come down although negligible. The optimum plot size observed
through smith's method and maximum curvature method was almost same. From
the above consideration a plot size of 8.64 m2 (9.6 m X 0.9 m) was found to be
most advisable for conducting most of the field experiments in brinjal.