physicochemical

ABSTRACTS
variability, heritability, genetic advance as per cent of
mean, genetic divergence, character association and
the magnitude of direct and indirect effects of yield
component traits with seed cotton yield in respect of 16
characters viz., plant height (cm), days to 50% flowering,
number of monopodia per plant, number of sympodia
per plant, number of bolls per plant, boll weight (g),
ginning out-turn (%), seed index (g)g), lint index (g), 2.5%
span length (mm), micronaire (10-6 g/in), bundle strength
(g/tex), uniformity ratio (%), fibre elongation (%), lint yield
per plant (g) and seed cotton yield per plant (g).
The genotypic coefficients of variation for all
the characters studied were lesser tan the genotypic
coefficients of variation indicating the masking effect of
the environment. Number of monopodia per plant,
number bolls per plant, lint yield per plant and seed
cotton yield per cent exhibited moderate to high
variability. High heritability coupled with high genetic
advance observed in the case of number of monopodia
per plant and lint yield per plant indicate the
predominance of additive gene action and hence, simple
selection might play a role to some extent. High
heritability coupled with moderate genetic advance was
observed in case of plant height, 2.5% span length and
seed cotton yield per plant revealing the role of both
additive and non additive gene action. The other traits
viz., number of sympodia per plant, number of bolls per
plant, boll weight, seed index and uniformity ratio showed
moderate heritability and low genetic advance indication
major role of non additive gene action.
The correlation studies revealed that plant
height, number of sympodia per plant, number bolls per
plant, boll weight, seed index, lint index, micronaire,
uniformity ratio, elongation and lint yield per plant had
significant positive association with seed cotton yield
per plant. The path coefficient analysis revealed that
plant height, days to 50% flowering, number of
monopodia per plant, number of bolls per plant, seed
index, lint index, uniformity ratio, and lint yield per plant
exerted direct positive effect on seed cotton yield per
plant. Selection based on these attributes my be helpful
in evolving high yielding varieties of upland cotton.
Principal component analysis identified six
principal components (PCs), which contributed 78.21
per cent of cumulative variance. The population with
high PC 1 values were characterized by high number of
monopodia per plant and bundle strength whereas,
population with high PC2 values were characterized by
lint yield per plant and number of bolls per plant. In
PC3, characters like 2.5% span length and elongation
showed maximum weightage.
Therefore, major emphasis should be laid on
selection process with more number of bolls per plant
and simultaneous selection of other traits viz., boll
weight, seed index, number of sympodia per plant and
lint index for realizing higher seed cotton yield with
desirable fibre quality. M.Sc (Ag), 2008
Impact of Krishi Vigyan Kendra on Farmers in Srikakulam District of
Andhra Pradesh
Student : Manoj. A
Major Advisor : Dr. G. Sivanarayana
Department of Extension Education
The Krishi Vigyan Kendras are designed to
impart the latest knowledge to the farmers through work
experience by employing the principles of “Teaching by
doing and Learning by doing”. The activities of the KVK
include technology assessment, refinement and transfer,
aiming to bridge the gap between the technology
developed at the research institutions and its adoption
at the field level by the farmers.
Detailed analysis of profile characteristics of
farmers indicated that majority of the respondents were
illiterates and small farmers with medium social
participation and medium exposure to mass media and
extension contact showing medium and high risk
orientation followed by low scientific orientation, medium
economic orientation along with medium achievement
motivation and medium level of innovativeness.
Majority of the respondents of adopted villages
experienced medium direct changes followed by more
and less direct changes, whereas, majority of the farmers
of non-adopted villages experienced less direct changes
followed by more and medium direct changes.
Nine out of ten independent variables such as
the education, social participation, mass media
exposure, extension contact, risk orientation, scientific
orientation, economic orientation, achievement
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