Browsing by Author "Narasimhayya, G."

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    Discriminant classification of Kerala soils in relation to incidence of coconut root - (wilt) disease: 1. Soil micronutrient aspects
    (2007-02-08) Kamala Devi, C.B.; Narasimhayya, G.; Wahid, P.A.; Nambiar, C.K.B.; Pillai, N.G.; Sharma, S.P.; Velayutham, M.
    The analysis of the nutrient data on the soil samples in Kerala collected from the different root (wilt) disease categories depending on the condition of the palm and the area sampled suggested the list of essential nutrients for the discrimination of the soils associated with the categories in different soil types as: 1. Latcritc — Fe, B, Mn, 1 Mo, Cu, S and Zn 2. Alluvial Fe, Mo and Zn 3. Reclaimed marshy — Fe, Zn, Cu, Mo , Mn and B 4. Coastal Sand - Fe, Zn, Cu and Mo 5. Sandy loam - Mn, Cu and Zn The classificatory analysis of the above data on the essential nutrients showed that soils of the above categories can be grouped into three clusters namely Healthy, leading to sick and sick in case of laterite, reclaimed marshy, sandy loam and two clusters as follows: healthy and sick in case of alluvial and coastal sandy soils.
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    Estimation of coconut yield based on snap observations
    (2007-02) Arulraj, S.; Narasimhayya, G.; Haveri, R.R.; Rajasulochana
    Regression analysis of number of 1. buttons less than four months age after the spathe opening (below fist size, X]) 2. nuts more than four months age after the spathe opening (above fist size, X2) and 3. bunches, (X3), observed during the different months of a year on the total harvested yield (y), of nuts during the next calender year recorded on forty three West Coast Tall palms grown at CPCRI farm, Kasaragod during their stabilised yield period observed for six consecutive years was undertaken. The coefficient of determination (R2) of the regressions showed progressive increase from January to December and attained a value around 0.90. This gives a good promise to give a reliable estimate of the yield of nuts harvested in a calendar year based on a single visit in the previous year to observe three easily measurable characters which may probably save man power and funds especially when the palms are located at different places.
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    Optimum Size and Shape of Plots in Blocks for Cardamom Experimentation
    (2007-02) George, M.V.; Pattan Shetty, M.V.; Narasimhayya, G.; Nambiar, M.C.; Sathe, K.V.
    Fairfield Smith equation with standard notions Y = 61.66 X-o.332 and its generalisation in the form Y=63.10 r -0-460 c -o-272 were fitted to the uniformity trial data on cardamom from Mudigere where Y is the C.V. for the plot size X of r rows of c plants each. The heterogeneity between rows was found to be significantly more than that of columns. The cost of experimentation per treatment to estimate the means at 10 per cent C. V. was worked out under different price situations. The plot size and shape giving the required information at a minimum cost was taken as the optimum. Four and six rows of three plants each were found to be the optimum plots for smaller and larger blocks respectively.
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    A Rapid Method for Estimation of Leaf Area of One Year Old Seedlings of Tall Variety of Coconut Palms
    (1983) Satheesan, K.V.; Narasimhayya, G.; Ramadasan, A.
    The area of individual leaf (P) of any position in one year old West Coast Tall (WCT) coconut seedlings can be estimated using a single linear function, P= 27.39+ 0.6 X in sq.cm. where X is the product of length and width of lamina, with a reliability of 91 per cent. The total functional leaf area (Y) can be estimated using the function Log (Y) = -0.434 + 1.042 Log (N) + 1.060 (X) with a reliability of 99 per cent and where N is the number of leaves, X is the mean product of length and width of all leaves, or using the function Log (Y) = 0.819—0.41 Log (N) + 0.915 Log (X3) where X3 is the product of length and width of the third leaf and N the number of leaves, with a reliability of 97 per cent.
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    A Rapid Method for Estimation of Leaf Area of One Year Old Seedlings of Tall Variety of Coconut Palms
    (1983-06) Satheesan, K.V.; Narasimhayya, G.; Ramadasan, A.
    The area of individual leaf (P) of any position in one year old West Coast Tall (WCT) coconut seedlings can be estimated using a single linear function, P= 27.39+ 0.6 X in sq.cm. where X is the product of length and width of lamina, with a reliability of 91 per cent. The total functional leaf area (Y) can be estimated using the function Log (Y) = -0.434 + 1.042 Log (N) + 1.060 (X) with a reliability of 99 per cent and where N is the number of leaves, X is the mean product of length and width of all leaves, or using the function Log (Y) = 0.819—0.41 Log (N) + 0.915 Log (X3) where X3 is the product of length and width of the third leaf and N the number of leaves, with a reliability of 97 per cent.