Browsing by Author "Ramanandan, P.L."
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Item Effect of continuous cultivation and manuring on the leaf nutrient composition and soil nutrient status of coconut palms(1974) Ramanandan, P.L.; Pillai, N.G.Three permanent observational plots, first with no cultivation and no manuring, second with regular cultivation but no manuring, and the third with regular cultivation and manuring have been maintained at the Institute since 1919. Analysis of leaf samples collected from these plots during summer (March) and rainy (July) seasons showed that during both the seasons, leaves of palms receiving regular cultivation and manuring contained significantly higher amounts of nitrogen (l.90% dry matter in summer and 1.92% in rainy seasons) and potassium (0.40 and 1.00% respectively). The average annual yield of nuts from this plot (67 nuts/palm) was also significantly higher than those from the other two treatments (39 nuts/palm for the cultivation and no manuring plot and 12 nuts/palm for the no cultivation and no manuring plot). Soil analytical data showed that available potassium in 0-30 cm and 30-60 cm depths of soil increased significantly in the cultivation and manuring plot over that of no cultivation and no manuring plot.Item Effect of continuous cultivation and manuring on the leaf nutrient composition and soil nutrient status of coconut palms(2007-02-08) Ramanandan, P.L.; Pillai, N.G.Three permanent observational plots, first with no cultivation and no manuring, second with regular cultivation but no manuring, and the third with regular cultivation and manuring have been maintained at the Institute since 1919. Analysis of leaf samples collected from these plots during summer (March) and rainy (July) seasons showed that during both the seasons, leaves of palms receiving regular cultivation and manuring contained significantly higher amounts of nitrogen (l.90% dry matter in summer and 1.92% in rainy seasons) and potassium (0.40 and 1.00% respectively). The average annual yield of nuts from this plot (67 nuts/palm) was also significantly higher than those from the other two treatments (39 nuts/palm for the cultivation and no manuring plot and 12 nuts/palm for the no cultivation and no manuring plot). Soil analytical data showed that available potassium in 0-30 cm and 30-60 cm depths of soil increased significantly in the cultivation and manuring plot over that of no cultivation and no manuring plot.Item Foliar yellowing of coconut palms in healthy and root (wilt) affected areas(1979-12) Thomas Varkey; Kamalakshi Amma, P.G.; Ramanandan, P.L.; Nambiar, P.T.N.An attempt had been made to check the foliar yellowing by applying different nutrients and also its effect on growth and yield of affected palms. Foliar sprays with 2% MgSO4 and 1 % FeSCO4, and basal application of MgSO4 reduced foliar yellowing by 26% in diseased palms and 87 % in healthy palms. In diseased palms the application increased yield by 106% while in healthy palms, the increase was 95%.Item Foliar yellowing of coconut palms in healthy and root (wilt) affected areas(2007-02) Thomas Varkey; Kamalakshi Amma, P.G.; Ramanandan, P.L.; Nambiar, P.T.N.An attempt had been made to check the foliar yellowing by applying different nutrients and also its effect on growth and yield of affected palms. Foliar sprays with 2% MgSC>4 and 1 % FeSCO4, and basal application of MgSO4 reduced foliar yellowing by 26% in diseased palms and 87 % in healthy palms. In diseased palms the application increased yield by 106% while in healthy palms, the increase was 95%.Item Incidence of Stem Bleeding Disease of Coconut Palm in Relation to PH and Electrical Conductivity of Soils(1980-06) Mathew, A.S.; Ramanandan, P.L.Soil reaction (pH) and electrical conductivity were determined in soil samples collected from 16 stem bleeding affected areas belonging to Kerala, Tamil Nadu, Karnataka, and Goa. They were not directly related to the incidence of stem bleeding disease of coconut palm.Item Interaction of Soil Groups on the Nutrient Exhaust by Coconut(2007-02) Ramanandan, P.L.; George, M.V.Results of investigation carried out to study the effect of soil groups on the nutrient content of various components of coconut fruit are reported in this paper. Potash was found to be removed most, followed by nitrogen, calcium, magnesium and phosphorus. Soil types were found to influence the nutrient exhaust by nuts. On comparison, palms growing on coastal alluvium removed 70 kg K2O ha-1 whereas the average value for red sandy loam and laterite was 53 kg K2O ha-1.Item Long Term Effects of Cultivation and Manuring on Coconut Soil(2007-02) Ramanandan, P.L.; Muliyar, M.K.Under the climatic and soil conditions existing at the Central Plantation Crops Research Institute, Kasaragod, regular cultivation and manuring are necessary to increase and maintain the yield at a high level in coconut. Regular cultivation by itself is effective in increasing yields, even in the absence of manuring. Soil samples collected during six consecutive years were analysed for N, P2O5, K2O, CaO and MgO. Cultivation alone as well as cultivation and manuring increased the available P2O5 and K2O in the soil in comparison with the uncultivated and unmanured plot.Item Manuring Coconut in Kerala(2007-02) Ramanandan, P.L.; Mathew, A.S.Item Mineral Nutrition of Root (Wilt) Affected Coconut Palm(2007-02) Pillai, N.G.; Balakrishnan Nambiar, C.K.; Mathew, A.S.; Kamalakshi Amma, P.G.; Robert Cecil; Ramanandan, P.L.; Kamala Devi, C.B.; Wahid, P.A.The mineral nutrition of root (wilt) affected coconut palm was thoroughly investigated by carrying out a nutritional survey, collecting soil and leaf samples of perfeotly healthy and diseased palms covering all the major coconut growing soil groups of Kerala State. The chemical analyses of these samples for both macro and micronutrients confirmed the accumulation of NPK in diseased palms. Nitrogen status of soils of disease affected tracts is higher -than that of Healthy soils. Among the secondary nutrients, deficiency of S is. evident. Imbalances in cationio ratios viz. K/Na, K/Mg, K/(Ca+Mg) and K/(Na+Ca+Mg): and anionio ratios via. P/S and N/S are quite apparent. Similarly, the defioienoies of Fe, Mn, Mo and Zn in particular in diseased palms are the other findings of great importance.Item Mineral Nutrition of Root (Wilt) Affected Coconut Palm(1975-09) Pillai, N.G.; Balakrishnan Nambiar, C.K.; Mathew, A.S.; Kamalakshi Amma, P.G.; Robert Cecil, S.; Ramanandan, P.L.; Kamala Devi, C.B.; Wahid, P.A.The mineral nutrition of root (wilt) affected coconut palm was thoroughly investigated by carrying out a nutritional survey, collecting soil and leaf samples of perfeotly healthy and diseased palms covering all the major coconut growing soil groups of Kerala State. The chemical analyses of these samples for both macro and micronutrients confirmed the accumulation of NPK in diseased palms. Nitrogen status of soils of disease affected tracts is higher -than that of Healthy soils. Among the secondary nutrients, deficiency of S is. evident. Imbalances in cationio ratios viz. K/Na, K/Mg, K/(Ca+Mg) and K/(Na+Ca+Mg): and anionio ratios via. P/S and N/S are quite apparent. Similarly, the defioienoies of Fe, Mn, Mo and Zn in particular in diseased palms are the other findings of great importance.Item A Note on Phosphate Manuring of Crotalaria striata(1957) Varghese, E.J.; Ramanandan, P.L.; Thomas, P.K.Item A Note on the Use of Chilean Natural Potassium Nitrate for Manuring Coconut(2007-02) Ramanandan, P.L.Item Quantity and Quality of Ball Copra in Relation to the Age, Size and Shape of Nuts(1955) Verghese, E.J.; Thomas, P.K.; Ramanandan, P.L.Item Quantity and Quality of Ball Copra in Relation to the Age, Size and Shape of Nuts(1955) Verghese, E.J.; Thomas, P.K.; Ramanandan, P.L.Item Stem Bleeding Disease Of Coconut(1976) Ramanandan, P.L.; Antony, K.J.Item Studies on the Storage of Tender Coconuts(1980-01) Ramanandan, P.L.Item Studies on the Storage of Tender Coconuts(1980-01) Ramanandan, P.L.Item Use Of Common Salt In Coconut Gardens(1973) Ramanandan, P.L.