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Dinesh, R.
- Physico-chemical, Biochemical and Microbial Characteristics of Soils of Mangroves of South Andaman: Impacts of Anthropogenic Disturbances
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Indian Forester, Vol 131, No 5 (2005), Pagination: 660-666Abstract
The impacts of anthropogenic disturbances like cutting of mangrove for fuel wood, making poles and fencing purposes and also illegal encroachment of mangrove area on the physico-chemical, biochemical and microbial characteristics of soils (0-30 cm) of major mangroves of South Andamans viz., Rhizophora mucronata, Rhizophora apiculata, Bruguiera gymnorrhiza, Xylocarpus granatum, Ceriops tagal and Nypa fruticans were the focus of this study. For this purpose we included soils from the inter-tidal areas of 10 disturbed and undisturbed mangrove forest sites of South Andaman. The soil pH, clay, cation exchange capacity (CEC). Al20 a and Fe203 a levels exhibited minimum variation between the disturbed and undisturbed sites. In contrast, organic C, total N, Bray P and K levels exhibited marked variation between the sites and were considerably lower at the disturbed sites. In comparison to the undisturbed sites, the levels of all the general and specific biochemical parameters were considerably lower at the disturbed sites due mainly to significant reductions in organic matter/ substrate levels. The study also indicated the low N availability and the possibility of fungi dominating over bacteria at both the mangrove sites. Overall, the study suggested that the number and activity of soil microorganisms depend mainly on the quantity ofmineralizable substrate and the availability of nutrients in thse mangrove soils.
- Soil Diversity of Andaman & Nicobar Islands
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Indian Forester, Vol 132, No 7 (2006), Pagination: 779-784Abstract
An attempt has been made in this paper to arrive at an estimate for the first time on the distribution and extent of coastal areas of Andaman&Nicobar Islands based on the soil characteristics. The paper also suggests the future land use for the improvement in crop productivity in Andaman and Nicobar Islands based on inventory of soil resource and other natural resources, description of various constraints, limiting productivity for sustainable bioproduction like deforestation, erosion etc. The study has been made in this paper to go deep in to that facet and advocate remedial measures as a pioneer work in Andaman&Nicobar Islands.- Massive Phosphorus Accumulation in Soils: Kerala's Continuing Conundrum
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1 Indian Institute of Spices Research (ICAR), P.O. Box 1701, Marikunnu P.O., Calicut 673 012, IN
1 Indian Institute of Spices Research (ICAR), P.O. Box 1701, Marikunnu P.O., Calicut 673 012, IN
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Current Science, Vol 106, No 3 (2014), Pagination: 343-344Abstract
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- Controversies Surrounding Coumarin in Cassia: The Good, the Bad and the not so Ugly
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1 Indian Institute of Spices Research (ICAR), P.O. Box 1701, Marikunnu PO, Calicut 673 012, IN
1 Indian Institute of Spices Research (ICAR), P.O. Box 1701, Marikunnu PO, Calicut 673 012, IN
Source
Current Science, Vol 108, No 4 (2015), Pagination: 482-484Abstract
In the world and Indian market, the cinnamon available is not the true cinnamon (Cinnamomum verum), but its avatar, viz. the fake cinnamon (C. cassia). The latter contains coumarin, which at high doses, has been found to cause hepatotoxicity, carcinogenesis and liver/lung tumours in rodents. However, such ill effects in humans due to coumarin are rare and only associated with high doses. A toxicological reevaluation of coumarin aimed to derive scientifically founded maximum limits is imperative.Full Text