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Author: search.filters.author.Joseph, C AHas files: Yes

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    Path analysis and selection index in groundnut
    (Kerala Agricultural University, 1986) Kuriakose, K P; Joseph, C A
    A path analysis and selection index study on 26 bunch varieties of groundnut was made. Path analysis showed that number of mature pods, 100 pod weight and 100 kernel weight were the important factors contributing to pod yield. Discriminant function using pod yield, number of mature pods, 100 pod weight, 100 kernel weight, number of seeds per pod and dry weight of haulm showed the highest relative efficiency.
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    Variability and correlation studies in groundnut
    (Kerala Agricultural University, 1986) Kuriakose, K P; Joseph, C A
    A variability and correlation study was conducted on 26 bunch varieties of groundnut. 100 pod weight, 100 kernel weight, number of seeds per pod and number of primary branches have high genotypic -coefficients of variation, heritability and genetic advance and low environmental coefficients of variation. Except number of seeds per pod, the other characters showed a positive correlation with pod yield. These characters due to substantive additive gene effect, can be most expected to express maximum response to selection.
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    Genetic variability and correlation in short duration rice cultivars
    (Kerala Agricultural University, 1994) Ahmed Regina; Rema Bai, N; Devika, R; Joseph, C A
    In order to understand the nature and extent of variability and association of various quantitative characters with grain yield, a field experiment was conducted with 45 short duration rice genotypes at the Rice Research Station, Moncompu. The environmental influence on the different traits was evident from the phenotypic coefficient of variability being higher than the genotypic coefficient of variability. Characters such as plant height, flag leaf area, panicle exsertion, number of grains per panicle and grain yield exhibited moderate to high heritability and genetic advance. Grain yield was found to be positively correlated both at genotypic and phenotypic level with number of productive tiller's per hill, plant height, flag leaf area, panicle length anil number of grains per panicle.
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    Effect of ammonium polyphosphate as a carrier for zinc in lowland rice
    (Kerala Agricultural University, 1997) Indira, M; Annie Koruth; Joseph, C A; Annie Koruth
    A field trial was conducted for four seasons to evaluate the efficacy of ammonium polyphosphatc (APP) for its sequestering effect of /me and to find out the optimum level of zinc for the rice crop. The results revealed the sequestering effect of APP to /.inc. Among the three levels of zinc application tried, 25 kg ZnSO4 per ha was found to be the optimum level of zinc for the rice crop.