Browsing by Author "Ramachandran, C"

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Effect of planofix on fruit set in mango (var. neelum)
(Kerala Agricultural University, 1979) Aravindakshan, K; Ramachandran, C; Pynadath, J S
Genetic variability, correlation studies and path coefficient analysis in bittere gourd (Momordica charantia L.)
(Department of Olericulture, College of Horticulture, Vellanikkara, 1978) Ramachandran, C; Gopalakrishnan, P K
Studies were undertaken with 25 diverse bitter gourd types in the Department of Horticulture (Olericulture), College of Horticulture, Kerala Agricultural University, Vellanikkara, Trichur, to estimate the genetic variability, correlation coefficients and path coefficients, and also to formulate a reliable selection index for the crop, during 1977-78. The results have shown that the differences between types were highly significant for all the twenty one characters studied. The estimates of variance components and coefficients of variation have indicated that the major portion of total variability in all characters, except number of seeds per fruit, was due to genetic causes. Heritability in the broad sense was found quite high for all characters except number of seeds per fruit. Expected genetic advance has shown that, by selecting five per cent superior plants from the available population, yield could be improved by 4.08 kg per plant. Characters such as yield per plant, vitamin C content, number of fruits per plant, number of female flowers per plant, iron content and phosphorus content which exhibited parallelism in the high estimates of heritability and genetic gain may be suggested to be due to the action of additive gene and can be straightly improved through selection. Type B.G.23 was found to be exceptionally high yielding. Yield per plant was found to be highly correlated with length of main vine, weight of fruit, length of fruit, number of fruits per plant, number of female flowers per plant and number of primary branches per plant. The correlation coefficients among these yield components were also highly significant. Path coefficient analysis has shown that the weight of fruit, number of fruits per plant and length of main vine had high direct positive effects on yield. Number of primary branches per plant, number of female flowers per plant and length of fruit exhibited low and negative direct effects on yield. Multiple regression analysis resulted in fitting a function, indicating that, about 74 per cent of the fruit yield in bitter gourd could be predicted phenotypically, if the observed value for length of main vine is multiplied by 0.8990, number of fruits per plant by 0.0492 and weight of fruit by 0.0335 and from their sum of products 7.2168 is subtracted.
Impact of rice minikit trials on the adoption behaviour of farmers
(Department of Agricultural Extension, College of Agriculture, Vellayani, 1992) Ramachandran, C; Bhaskaran, C
With a view to study the impact of Rice Minikit Trials on adoption behavior of farmers the present investigation was undertaken under the title “Impact of Rice Minikt Trials on the Adoption Behaviour of Farmers”. Impact was measured in terms of the adoption of the selected recommended practices by the participant farmers and the non-participant farmers. The farmer’s perception about the innovation-characteristics of Minikit Variables of Rice, the procedures followed in conducting Rice Minikit Trials, and the constraints faced by the participant farmers and the extension personnel were also analysed. The study was conducted in Kollam district. The sample consisted of 60 each of randomly selected participant farmers and non-participant farmers and 30 Agricultural Officers. Data were collected using interview schedule and suitable statistical techniques were employed in the analysis of data. The study revealed that the participant farmer’s adoption of the recommended practices, though partial in some aspects, was significantly affected by the Rice Minikit Trials. The selected independent variables together contributed significantly in the variation adoption behavior of both the participants as well as the non-participant farmers. The analysis of the perception of the farmers about the innovation- characteristics revealed, profitability as the most striking innovation characteristic of the Minikit varieties of Rice. The evaluation of the procedures of conducting Rice minikit Trials showed that most of the procedural requirements were not being fulfilled satisfactorily. The results of the constraint analysis pointed out that timely supply of kids, literature on package of practices recommendations of the variety along with the kit and timely guidance and supervision were given the least attention. The results point out to the need for proper planning and improvement in every step in the conduct of the Trials to reach its cherished goals.
Variability in selected varieties of cowpea Vigna unguiculata Walp
(Kerala Agricultural University, 1980) Ramachandran, C; Peter, K V; Gopalakrishnan, P K
Variability studies for biochemical traits in bitter gourd
(Kerala Agricultural University, 1980) Ramachandran, C; Gopalakrishnan, P K
Genetic variability was estimated for various biochemical traits in a collection of 25 diverse types of bitter gourd at the College of Horticulture, Vellsnikkara, Trichur. The differences among the types were highly significant for all the traits, The characters such as vitamin C content, phosphorus content total soluble solids and iron content having high or moderate estimates of heritability and high genetic gain are suggested to be controlled by additivegenes and the rest of the traits by non-additive genes. The association analysis among the quality factors has indicated that the improvement of total soluble solids will improve the vitamin C content, phosphorus content and potassium content in the fruits and yet maintain a reasonably high protein content.