Browsing by Author "Nagarajan, M."
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Item Heavy metal pollution through cement dust in coconut ecosystem(1990) Biddappa, C.C.; Nagarajan, M.; Rethinam, P.Item Heavy metal pollution through cement dust in coconut ecosystem(2007-02) Biddappa, C.C.; Nagarajan, M.; Rethinam, P.Item Influence of saline environment on the incidence of stem bleeding in coconut (Cocos nucifera L.)(1985-10) Nagarajan, M.Item The Influence Of Some Agricultural Practices On The Enzyme Activity Of Coconut Water(1965-12) Nagarajan, M.; Pandalai, K.M.Item A note on Saline Water Irrigation to Coconut Palm Cocos nucifera Linn in Sandy Loam Soil.(1975) Nagarajan, M.; Sankaranarayanan, M.P.; Nelliat, E.V.Item A Note on the Nutrient Composition of Fruiting Branches of Black Pepper (Piper nigrum L.)(1975) Nagarajan, M.; Pillai, N.G.Item A note on the Nutrient Removal by Ginger and Turmeric rhizomes(1979) Nagarajan, M.; Pillai, N.G.Item A note on the Nutrient Removal by Ginger and Turmeric rhizomes(1979) Nagarajan, M.; Pillai, N.G.Item A Note on the Outstanding Growth of Coconut Seedlings in a Photoperiodic Experimental Nursery and its Relation to Soil Conditions(2007-02) Nagarajan, M.; Pillai, N.G.Item On the potash content and enzymic activity of coconut water in relation to the nutrient need assessment of the coconut palm(1972-06) Pandalai, K.M.; Nagarajan, M.Item Radial Dispersion of Micronutrients through Cement Dust in Coconut Ecosystem(1988) Nagarajan, M.; Rethinam, P.; Biddappa, C.C.Item A rapid turbidity procedure for estimation of oil content in copra, fresh coconut endo-sperm and allied tissue materials(1981-04) Nagarajan, M.; Nair, R.B.Item Residual Effect of Long-Term Phosphorus Application on Soil and Plant Nutrient Contents, Mycorrhizal Association and Yield of Coconut(1992) Hameed Khan, H.; Biddappa, C.C.; Nagarajan, M.; George V. Thomas; Cecil, S.R.Skipping of phosphorus application to adult coconut palms has resulted in reduction of salt available P in manuring circle (0-90 cm) from 43.88 ppm to 12.72 ppm over a period of 14 years and alto had no deleterious effect on P nutrition and yield of palms indicating residual effectiveness of phosphorus. Application of P at two levels showed no advantage in further enhancement of P nutrition and yield. The mean soil available P was 12.72, 30.43 and 53.29 ppm in P-0, P-1 (160 g P2O5, palm-1 year-1) and P-2 (320 g P2O5 palm-1 year-1) respectively. N, P, K. Ka, Ca, Mg, Fs, Mn, Zn, and Ca contents of the palm (Frond 14) were alto net significantly different among the treatments and ware In sufficiency range. Interestingly, VA mycorrhizal infection was more In the P-O treatment (79.3%) compared to P-1 (52.1%) end P-2 (47.1%). Population of P zolubilizing bacteria was also higher In P-0 treatment indicating the involvement of microbial population in P nutrition of coconut. The mean yield of the palms (1989) viz., 109.07, 102.36 and 108.71 nuts palm-1 per year-1 in P-0, P-1 and P-2 treatments respectively and the cumulative yield for four years did not show significant differences among the treatments, it was indicated that residual phosphates of 40 ppm in 0-90 cm in depth in the basin could sustain adquate P nutrition and normal yields for 14 years. Also sail available phosphorus status of 10-12 ppm maintained sufficiency level of P in the coconut palm. Soli available P of less than 10 ppm warrants full recommended dose to be applied (P2) and soils testing 10-28 ppm need only 59% of recommended dote (P1). For soils testing more than 20 ppm, application of phosphorus can be withheld for certain years.Item Studies on the enzyme activity in the haustorium of the germinating coconut Part I. Preliminary Paper.(2007) Nagarajan, M.; Pandalai, K.M.Several enzymes of the carbohydrase, proteinase and Upas group appear to be active in the haustorium tissues of the coconut seedlings. Some of these have been characterised and an approximate estimate of the intensity of their activity at one stage (during the sixth month after sprouting) of the seedling has been made. The following enzymes were found present -peroxidase, ascorbic acid oxidase, dehydrogenase, catalase, lipase, alkaline phosphatase, acid phosphatase, urease, sucrase, carbonic anhydrase, gluta-minase, asparaginase, aspartase and enzyme of proteolytic activity. At the sixth month stage there was high peroxidase and lipase activity in the haustorium.