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Author: search.filters.author.Prabhakaran, P V

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    Prediction of weekly rainfall of a place
    (Kerala Agricultural University, 1977) Surendran, P U; Sunny, K L; Prabhakaran, P V
    New methods for estimating the weekly rainfall of a place has been developed h this pap?r. The California and Hazen's methods found in Patro et nl have been shown to be their special cases. It has further been pointed out that i h " method, of which Hazen's is a special case, is rationally more appropriate than the other though all of thsm are linearly related- A new but exquisite criterion for determining the adequacy of the data has also been established.
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    Optimum plot size for field trials with banana
    (Kerala Agricultural University, 1978) Prabhakaran, P V; Balakrishnan, S; Mary George
    The data from a uniformity triai on banana was analysed for finding the optimum plot size for conducting field experiments. The results showed that single plant plots were most efficient. The co-efficient of variation of yield decreased steadily with increasing plot size. The empirical law suggested by Fairfield Smith gave a satisfactory fit to the data. The number of replications required for providing estimates with 5% standard error decreased with increased plot size, but the total experimental material required was minimum when single plant plots were used. However, as banana plants are liable for disease incidence, three plant plots are suggested for experiments.
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    Seasonal behaviour of plant growth regulator in inducing flowering in pineapple
    (Kerala Agricultural University, 1978) Balakrishnan, S; Prabhakaran, P V; Nambiar, I P S; Nair, K K R
    Studies conducted to evaluate the efficacy of different growth regulators such as ethrel in different concentrations, planofix in different concentrations, calcium carbide, acimone and a combination of ethrel urea and calcium carbonate from May to February revealed that Ethrel would give comparatively better performance throughout the year under Kerala conditions. But ethrel in combination with urea and calcium carbonate was most effective. It was also cheaper than ethrel in higher concentrations and induced equally good percentage of flowering in pineapple.
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    Relationship of some quantitative traits with the yield of pineapple
    (Kerala Agricultural University, 1978) Prabhakaran, P V; Balakrishnan, S
    Simple and partial correlation coefficients of certain quantitative traits with yield of pineapple were calculated. Number of leaves was found to be positively correlated with yield. Dimensions of the 'D' leaf did not show any significant association with yield in the case of plants having a fixed number of leaves. A multiple regression equation was fitted for predicting the expected yield of pineapple from a knowledge of other quantitative traits. The crown weight had a linear relation with fruit weight, but when it was expressed as a percentage of fruit weight the correlation turned out to be negative.
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    Effect of levels of N, P & K on the uptake of nutrients and grain yield in cowpea
    (Kerala Agricultural University, 1979) Mohan Kumar; Balakrishna Pillai, B; Prabhakaran, P V
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    Correlation of yield of PTB rice varieties with some weather factors
    (Kerala Agricultural University, 1985) Prabhakaran, P V
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    Genetic divergence in banana
    (Kerala Agricultural University, 1985) Valsalakumari, P K; Sivaraman Nair, P C; Prabhakaran, P V
    On the basis of multtvariate analysis 62 cultivars of banana belonging to different genomic groups were grouped into 8 clusters considering 22 characters simultaneously. The characters pulp/peel ratio on volume basis followed by the weight of fruit contributed the maximum towards divergence.
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    Genotypic variability correlation and path-coefficient analysis in turmeric
    (Kerala Agricultural University, 1987) Geetha, U; Prabhakaran, P V
    Data on 18 biometric characters of 19 varieties of turmeric gathered from a field trial were analysed and the various genetic parameters estimated. High heritability estimates were manifested by girth of mother rhizome at centre and height of the plant. The expected genetic gain from plant height was also high. The correlation studies revealed that all characters were positively related to yield. Path-coefficient analysis showed height of the plant and length of secondary finger were the major contributors towards the rhizome yield.
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    Characterization of the pattern of rainfall in northern Kerala
    (Kerala Agricultural University, 1988) Santhosh, K; Prabhakaran, P V
    A first order Markov Chain model was applied to daily rainfall data of five selected reporting stations of northern Kerala with a view to characterize the rainfall p-.ttern in that tract. It was found that the mod^l was adequate in representing the rainfall pattern in almost all fortnights except a few at the beginning and at the end of the year. The equilibrium probability of occurrence of wet day showed increasing trend iall centres upto 12th, 13th or 14th fortnights and then decreased. The results indicated that the likely commencement af south-west monsoon was in ui>> 11th fortnight (June 1 to 15). Suitable probability distributions were fitted to estimate the rainfall probabilities. It was found that there was slightly higher chance at Irikkur and Mananthody to get sufficiently high rainfall during earlier fortnights (8th and 9th).
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    Efficiency of covariance analysis in manurial trials on cashew
    (Kerala Agricultural University, 1983) Prabhakaran, P V; Remesh B Nair