Browsing by Author "Raychaudhuri, S.P."

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    Studies on Indian Red Soils IV. Nature of the Weathering Complex as Determined by the Van Bemmelen-Hissink Method of Hydrochloric Acid Extract
    (2007) Raychaudhuri, S.P.; Mukherjee, M.K.
    1. The percentages of silica, alumina and iron oxide dissolved from the soil by treatment with boiling hydrochloric acid and the percentages of alkali-soluble silica in the residue after extraction with hydrochloric acid have been determined. 2. Soils occurring at a height of 7,000 ft. a.s.l. in the Nilgiri hills are considerabley rich in the acid-soluble oxides of aluminium and iron. So also are the samples from Bidar (Hyderabad), Telankheri (Nagpur, C. P.), Chandkhuri Farm (Raipur, C. P.), and from Kakat (Malabar Coast). 3. The percentages of alkali-soluble silica do not show any regularity down the profiles. In the case of soils from Nilgiri hills, it is found that the greater the height from where the soils were collected the less is the quantity of alkali-soluble silica. 4. The red soils of Assam appear to be of the class of red loam, and the soils from the Barind tract are similar in nature to the soils of Assam. 5. The trends of variation of molecular ratios SiO2/Al2O3, SiO2/RaO3 and Al203/Fe2O3 of HC1 extract of profile samples have been brought about.
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    Virus Associated With Coconut Root (Wilt) Disease
    (1969) Arvind S. Summanwar; Jagadish Chandra, K.; Raychaudhuri, S.P.; Nam Prakash; Lal, S.B.