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Subramaniam, V.
- Fertilisation in Eucalyptus grandis on Severely Truncated Soil. III: Nutrient Uptake
Authors
Source
Indian Forester, Vol 110, No 10 (1984), Pagination: 1033-1048Abstract
Nutrient content and uptake by different components (ischolar_main stem, twig and leaf) of one year old Eucalyptus grandis as affected by urea and superphosphate application at Minmutti, Kerala was estimated. In general, N, and K concentration decreased due to N and P fertiliser application either alone or in combination. However, uptake of N, P and K increased with each dose of application of N and P fertilisers and generally uptake values were maximum in N75 P75 treatments. Percent recovery of N was greater (79.1%) in N75 P75 treatment and P recovery (18.8%) In N75 P75 treatment.- Carbonatite Alkali Complex of Samalpatti Dharmapuri District, Tamil Nadu
Authors
1 Office of the State Geologist, Madras 32, IN
2 St. Xavier's College, Bombay 400001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 19, No 5 (1978), Pagination: 206-216Abstract
Dunites, pyroxenites, alkali syenites and carbonatites form the complex. The complex intrudes in a discordant fashion, hornblende gneisses which form the country rock.
The carbonatites are distributed mainly in pyroxenite as fracture fillings and to a lesser extent as dykes in syenites. The carbonatite bodies form a distinct but discontinuous ring. The calcite-dolomite carbonatite and para-ankerite carbonatite are the main types. Varieties having mica, monazite, riebeckite and ilmenite are identified. Quartz-baryte-galena veins, pegmatites of syenitic composition and albitites are associated with the carbonatites. Evidences for fenitisation are not much. Feldspathoids, normally associated with carbonatite activity are absent. Xenoliths of gneisses, pyroxenite and syenite in carbonatites, compositional banding and primary foliation, are some of the features of the carbonatites. On the basis of mineral assemblage, the temperature of formation of this complex is assigned 325°C. Analyses indicate relatively high values for barium, cerium, yttrium, zirconium, vanadium and boron.