Browsing by Author "Kamalam, N.V."

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    Foliar levels of rare earth elements and thorium in coconut palm in relation to root (wilt)-disease
    (2007-02) Wahid, P.A.; Kamalam, N.V.; Vijayalakshmi, S.; Krishna Prabhu, R.; Mahalingam, T.R.; John T. Eapen; Dang, H.S.; Jaiswal, D.D.; Balachandran, P.V.; Venugopal, V.K.; Suresh, P.R.; Unnithan, V.K.G.; Jacob Thomas
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    Nutrient Distribution in the Crown of Healthy and Root (Wilt) Affected Coconut Palms
    (2007-02) Wahid, P.A.; Kamalam, N.V.
    The pattern of distribution of nutrients in the crown of coconut palm as influenced by root (wilt) disease was studied to examine whether 14th leaf is suitable for comparison of nutrient status between healthy and diseased palms. The results indicated that the nutrient levels in the leaves of diseased palms are generally higher than in healthy ones. The differences in foliar levels of nutrients are more conspicuous for leaf ranks 4 and 6 than when the nutrient levels of 14th leaf were compared. It is concluded that 14th leaf which is generally considered as the index leaf for nutrient deficiency diagnosis in coconut is not suitable for comparison of the nutritional status of healthy and root (wilt) affected palms.
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    Nutrient Distribution in the Crown of Healthy and Root (Wilt) Affected Coconut Palms
    (1988-03) Wahid, P.A.; Kamalam, N.V.
    The pattern of distribution of nutrients in the crown of coconut palm as influenced by root (wilt) disease was studied to examine whether 14th leaf is suitable for comparison of nutrient status between healthy and diseased palms. The results indicated that the nutrient levels in the leaves of diseased palms are generally higher than in healthy ones. The differences in foliar levels of nutrients are more conspicuous for leaf ranks 4 and 6 than when the nutrient levels of 14th leaf were compared. It is concluded that 14th leaf which is generally considered as the index leaf for nutrient deficiency diagnosis in coconut is not suitable for comparison of the nutritional status of healthy and root (wilt) affected palms.
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    X-Ray Fluorescence Spectra Of Root (Wilt) Affected Coconut Palm
    (1983) Wahid, P.A.; Lal, M.; Kapoor, S.S.; Rekha Govil; Kataria, S.K.; Venugopal, V.K.; Kamalam, N.V.
    Trace element composition of soil, root and leaf samples collected from healthy, and root (wilt) diseased coconut palms were determined employing energy dispersive X-ray fluorescence technique. Non-nutrient trace elements such as Ti, Cr, Ni, Pb, Br, Rb, Sr and Zr were detected in soil samples. Sandy soil in the Kayangulam area is rich in Ti. Strontium content of laterite soils of Pilicode is less as compared to similar soils in the diseased tract. Root samples contained all these elements except Cr and Zr in detectable concentrations. Nickel content of roots from diseased palms was higher than that of roots from healthy palms. Low concentration of Sr in the leaves of diseased palms and relatively higher concentration of this element in the roots indicate that the translocation of Sr in diseased palms is hindered. Titanium, Cr, Pb and Zr wore not detectable in coconut leaves.