Browsing by Author "Chandrika, P"

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    Genetic studies in cowpea
    (Division of Agricultural Botany,College of Horticulture, Vellanikkara, 1979) Chandrika, P; Narayanan Namboodiri, K M
    Geneticstudies were undertaken with 202 varieties of cowpea (Vigna ungulculata L.) maintained in the germplasm collection of the Division of Agricultural Botany, College of Horticulture, Vellanikkara. The studies conducted during the two khariff seasons of 1977-78 and 1978-79 were mainly directed towards estimation of the variability available in the collection, working out of the heritable components of the variability, identification of promising donor varieties for important characters and grouping the varieties into clusters according to the estimated genetic distances following the Mahalanobis D2-statistic.
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    PTB-1 (Kanakamani) a high yielding variety of cowpea
    (Kerala Agricultural University, 1979) Viswanathan, T V; Viswambharan, K; Chandrika, P
    Comparative yield trial of four varieties and two improved cultuies of Cowpea was undertaken at Rice Research Station, Paltambi during 1974 — 75, Kharif season onwards with a view to isolating and releasing high yielding varieties suitable to Kerala condition. This was continued for three years. The consistently highest yielder Kunnamkulam local was recommended for release for general cultivation in Kerala during December 1977 under the popular name "Kanakamani".
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    Response of cowpea (Viga sinensis Endl). to different levels of N, P & K
    (Kerala Agricultural University, 1978) Viswanathan, T V; Viswambaran, K; Chandrika, P
    A field trial was conducted at .the Rice Research Station, Pattambi to find out the response of cowpea to graded doses of N, P and K, under high rainfall conditions. The test variety PTB, exhibited significant response to N and P. The optimum doses of nutrients for maximum yield were 31 .67 kg N and 37.37 kg P205/ha. The economic doses of fertilisers were, 23.13 kg N and 23.55 kg P2O5 per ha Response to applied potash was not significant.