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M. N. Jha , P. Pande

Abstract

The present investigation deals with the impact of growing Eucalyptus and Sal monoeultures. On soil of Doon Valley by comparing it with the soil conditions under natural Sal forest. None of the monocultures could surpass the natural Sal as far as Organic matter accumulation, total N, P and available N, P, K are concerned. The Eucalyptus monoculture of fairly young age has shown higher accumulation of Organic matter in comparison to Sal monculture. The physical and chemical properties of the soil under Eucalyptus monoculture has been found to he better in comparison to sal monoculture. It has been concluded that raising Eucalyptus monocultore in natural Sal area causes no damage to the soil fertility and proves superior to long standing Sal monculture in Doon Valley.

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M. N. Jha , R. K. Rathore , P. Pande

Abstract

Soils and their behaviour with respect to natural regeneration of fir and spruce in Narkanda (Himachal Pradesh) were studied. Soil formation is predominantly governed by podzolization process but the soli propi1e in poorly regenerated area shows almost negligible eluviation of clay and organic matter due to fairly well developed 'O' horizon. The soils are distinctly acidic, unsaturated and possess low cation exchange capacity. It is likely that the hydrophobic substance released from the decomposition of litter of fir and spruce severely restricted the wetting of the soil Therefore, the insufficient moisture content in the soil due to this thick layer of bumus on tbe surface affected the process of natural regeneration of fir and spruce in Narkanda.

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R. M. Singhal , J. S. Samra , S. D. Sharma , P. Pande , S. K. Sharma

Abstract

Interrelationship between the soils and vegetation have been discused in respect of a forest land of Dun Valley (U.P.) having sal (Shorea rabusta), teak (Tectona grandis) and miscellaneous species as its main vegetation. The soils under various types of vegetation differ marginally from one another at various levels. The soil under teak and miscellaenous species contain comparatively more available nutrients than soils under sal, which has otherwise sustained greater interaction by vegetation during the course of their development.

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R. N. Kaul , M. N. Jha , P. Pande

Abstract

no abstract

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S. P. Banerjee , P. Pande , R. C. Pant , R. K. Suri , K. C. Bodala

Abstract

The lateritic soils of East Midnapur Forest Division, West Bengal are low in the physico-chemical agents responsible for soil aggregation except total and free iron oxides. The state of aggregation of the five depths studied considered along with the vertical distribution pattern of free iron oxides and of clay in these soils indicate that free iron oxides have participated rather actively in the formation of the non dispersible aggregates stable to water action. The trend of distribution and the relationships of the free iron oxides vis-a-vis aggregation has been discussed.

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M. N. Jha , P. Pande

Abstract

In the present study, an attempt has been made to show the loss of soil moisture as affected by decomposing leaf litter of five different forest species viz, Sal (Shorea robusta), Poplar (Poplus deltoides), Chir (Pinus roxburghii), Eucalyptus (Eucalyptus hybrid), and Teak (Tectona grandis). It has been found that, increasing levels of leaf litter reduce the loss of soil moisture. However, as the process of decomposition advances the loss of soil moisture increases gradually at both levels of organic matter treatment (10% and 20%) because of the disappearance of organic matter from the soil under all the five species. The performance of the five species on the moisture loss has been found to be in the fol1owing order of magnitude : Poplar > Eucalyptus > Chir > Teak > Sal.

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K. C. Joshi ¹, Y. P. Sharda ², Jaya Singh ¹, S. K. Gupta ¹, P. Pande ¹

Affiliations
1 Geological Survey of India, Lucknow - 226 024, IN
2 Geological Survey of India, Delhi -110 062, IN

Abstract

Seismic microzonation studies in Delhi have been carried out solely on the strength of the geotechnical data available with the Geological Survey of India. The main derivative products of the exercise include the shear wave velocity and predominant frequency maps on 1,50,000 scale. These maps are based on the N value data of subsurface soil columns, mostly down to a depth of 30 m, as observed at 121 Bore-Hole sites, in addition to the depth to bedrock, and other geological and geomorphological information.

The different ground response parameters, e g shear wave velocity and predominant frequency have been estimated by using empirical relationships developed elsewhere, especially m California, USA Although the tenacity of the qualitative/ semi quantitative results is yet to be affirmed, the maps, by and large conform to the effects of the past near and far events, such as the 1905 Kangra, 1960 Delhi and 1999 Chamoli earthquakes.

The amplification of the ground motion being the inverse function of impedance contrast between the underlying hard rock and the overlying soft sediments in Delhi, where the underlying rock is represented by quartzite, practically, the relative values of shear wave velocity of the soft sediments indicate the likely amplification - the low velocity promoting higher amplification A maximum ground motion amplification of 12 5 times and a minimum of 5 times, when assuming the damping as zero, has been estimated However, the actual amplifications are bound to be less because the soil does dampen the ground motions The predominant frequency map prepared on the assumption of simplified subsurface configuration, provides a generalized picture of the range of frequencies expected to get amplified -the amplification governed by the shear wave velocity of the soil cover there.

Keywords

Seismic Microzonation, Geotechnical Studies, Site Amphfication Effects, Delhi Area.

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R. Tyagi ¹, P. Pande ¹, A. Trehan ¹, R. S. Negi ², V. Hande ³

Affiliations
1 Department of Pathology, INHS Asvini, Mumbai, IN
2 Department of Radiodiagnosis and Interventional Radiology, INHS Asvini, Mumbai, IN
3 INHS Asvini, Mumbai, IN

Abstract

Idiopathic chronic eosinophilic pneumonia is a rare disorder of unknown cause characterized by respiratory symptoms of more than 2 weeks, alveolar or blood eosinophilia, peripheral pulmonary infiltrates on imaging after exclusion of known cause of eosinophilic lung disease. It is a rare disorder and contributes 0-2.5% in different registries of Interstitial Lung disease. Links between asthma and idiopathic chronic eosinophilic pneumonia have also been described. We report a case of this rare entity.

Keywords

Eosinophilia, Idiopathic Chronic Eosinophilic Pneumonia, Migratory Opacities, Broncho Alveolar Lavage.

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