Browsing by Author "Velayutham, M."
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Item Changes in the chemical composition of nut water and kernel during development of coconut(2007-02-08) Kamala Devi, C.B.; Velayutham, M.Maximum quantity of nut water was observed in six month old nuts. The sugar content of the nut water and kernel were maximum in eight month old nuts. Potassium was the predominant ion in nut water. With gradual decrease in acidity (free fatty acids) of nut water and sugar content of nut water and kernel, there was increase in oil content. The level of different constituents in nut water and kernel and their relative changes were similar in the different genotypes.Item Coconut soils on the East Coast of India(2007-02-08) Sankaranarayanan, M.P.; Velayutham, M.Item 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.Item Nutrient Indexing in Coconut Leaves and Soils of Lakshadweep Islands: 1- The Need for Potash and Nitrogen(1979-12) Singh, K.D.; Velayutham, M.Item Nutrient Indexing in Coconut Leaves and Soils of Lakshadweep Islands: II-Micronutrient Aspects(1980) Singh, K.D.; Velayutham, M.Item The occurrence of phosphatic sands in Lakshadweep Islands(1978-03) Singh, K.D.; Kamala Devi, C.B.; Velayutham, M.Item Soil and Leaf Analyses in Relation to the Nutrition of High Yielding Coconut Genotypes(1976) Kamala Devi, C.B.; Velayutham, M.; Haridasan, M.Seasonal changes in the nutrient composition of index- leaf and available nutrien status of a ten year old coconut planatation on acid sandy loam soil were evaluated in three high yielding coconut genotypes (West Coast Tall, Tall x Dwarf, and Dwarf x Tall) growing under three fertilizer levels. Seasonal changes in leaf nutrients status confirmed that the fourteenth leaf could be taken as the index leaf under the local conditions. Available K was a limiting nutrient which was reflected in deficient K concentration in leaf of control plots. An inverse relationship between K and Mg content of leaf was observed. Leaf concentration of N was not significantly influenced by fertilization. Even at the highest level of fertilizer application was below the critical limit proposed by IRHO. However, yield data indicated that the critical limit could possibly be lowered to suit the West Coast of India conditions. No significant variation was observed in P content of leaves due to fertilisers or genotypes. Fixation of P in the soil, appeared to be accentuated during monsoont months. NPK fertilization increased the concentrations of Mn, Zn, Fe, and Cu in the leaf while that of Ca, S, Fe, B, and Mo were unaffected.Item Soil Management for Enduring Agriculture in Lakshadweep Islands(1978-09) Velayutham, M.; Singh, K.D.Item Soils that Support Coconut in the West Coast(1976) Sankaranarayanan, M.P.; Velayutham, M.