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Item Note on germinating seeds of pineapple (Ananas comosus merr.)(Kerala Agricultural University, 1976) Gopimony, R; Balakrishnan, S; Kannan, KItem Influence of planting suckers in level ground and in trenches on fruit yiled of pineapple(Kerala Agricultural University, 1977) Balakrishnan, S; Veeraragbavan, P G; Natarajan, MItem Estimation of leaf area in pineapple(Kerala Agricultural University, 1978) Balakrishnan, S; Sukumaran Nair, P; Nair, K K R; Nambiar, I P SItem Relationship of some quantitative traits with the yield of pineapple(Kerala Agricultural University, 1978) Prabhakaran, P V; Balakrishnan, SSimple 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.Item Effect of nitrogen nutrition on quality and storage behaviour of pineapple(Kerala Agricultural University, 1980) Balakrishnan, S; Aravindakshan, M; Marykutty, K C; Valsamma MathewIn studies on the effect of different levels of nitrogen nutrition on fruit quality and storage behaviour of pineapple, it was found that at harvest, the maximum reducing sugars, brix to acid ratio and sugar to acid ratio were registered at lowest level of nitrogen at 8g/plant As the level of nitrogen was increased to 12g/plant, total sugars increased, but there was a decrease as the level was further increased to 16g/plant. Acidity and TSS showed an increasing trend with increasing levels of nitrogen. During cold storage, higher levels of nitrogen recorded a decrease in reducing sugars. Maximum increase in acidity was recorded by the lowest level of nitrogen under both storage conditions. Increase in nitrogen level upto 12g per plant was found to have a favourable influence on total sugars in both open and cold storage conditions. Better retention of brix to acid ratio in cold storage and to reducing sugars in open storage was observed when the nitrogen dose was increased to 16g/plant.Item Effect of different light intensities on the vegetative characters and leaf analysis of pineapple variety 'kew'(Kerala Agricultural University, 1980) Radha, T; Aravindakshan, M; Balakrishnan, SIn studies on the influence of different intensities of shade on the growth behaviour and nutrient status of leaves of pineapple plants, it was found that the pineapple plants tolerated shaded situations even upto 75 per cent. Under shaded situations, increased leaf area and higher contents of nitrogen, magnesium and chlorophyll in leaves were recorded.Item Effect of size of suckers on growth and yield in pineapple (Ananas Comosus. Merr.) cv. Kew(Kerala Agricultural University, 1981) Balakrishnan, S; Nayar, N K; Valsamma MathewStudies carried out at the Pineapple Research Centre, Kerala Agricultural University, Vellanikkara during 1976-78 on the effect of different sizes of suckers on growth and yield in pineapple variety 'Kew' revealed that the productivity of the crop is not influenced by the size of suckers used for planting.