Informatics Publishing Limited

Prabhakar Dubey , Padmini Shlvkumar , A. C. Banerjee , R. K. Dixit , S. K. Rathore

Abstract

Forestry activities in semi-arid regions of Uttar Pradesh are of great importance to meet the fuel, fodder and timber demand of local people. An international trail of dry zones hardwood species was carried out in Vrindavan forest block, Mathura, for screening a wide range of species, suitable for use in rural afforestation schemes and agroforestry systems. The results of the 8 year old trial showed that species adapted for region are Guazuma ulmifolia, Senna atomaria, Caesalpinia velutina , Parkinsonia aculaeta, Gliricidia sepium, Leucaena leucocephala, Mimosa tenlliflora, Caesalpinia coriaria etc. Most of these species are nitrogen fixing legumes and hence will be useful in improving the soil characteristics.

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S. L. Singh , A. C. Banerjee , N. K. Shukla , B. S. Burfal , C. M. Mishra , P. Dubey

Abstract

The occurrence of multiple seedlings were observed in Neem (Azadirachta indica) during the germination studies in different Seed Sources of seeds. In the case of Neem the emergence of multiple seedlings is not due to polyembryony but due to sowing of seeds along with the endocarp of fruit not kernel. Each endocarp encloses 1-4 seeds in it. However, in the present study it differs in different Seed Sources.

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A. C. Banerjee ¹, Des Raj ¹, Manas Roychowdhury ²

Affiliations
1 Geological Survey of India, Sector 10A, Gandhinagar - 382 043, IN
2 Coal Wing, Geological Survey of India, 29, J. N. Road, Calcutta - 700 016, IN

Abstract

Some samples from a chrome spinel-bearing intrusive picrite within olivine rich Deccan basalts at Limbdi in Saurashtra show anomalous high contents of gold (148-231 ppb), platinum (15-125 ppb) and palladium (17-311 ppb). Other samples bear an avenge of ∼6 ppb of gold, ∼31 ppb of platinum and ∼42 ppb of palladium. Sulphide mineralisation in the picrite is of extremely fine grain size, with low to moderate whole-rock contents of sulphur varying between 0.08 to 0.53 %. Higher values of gold and platinum are found in the western olivine-rich portion of the intrusive, while at surface level platinum/palladium ratio decreases due east with increase in palladium. This intrusive with higher average contents of precious metals could be a potentid target for exploration. Such high contents of gold, platinum and palladium are hitherto unreported from Deccan volcanic province.

Keywords

Gold, Platinum, Palladium, Economic Geology, Picrite, Deccan Trap, Saurashtra, Gujarat.

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A. C. Banerjee

Abstract

When we say R. Concrete we mean concrete reinforced with steel and the name Wood Concrete may sound fantastic. The idea of wood-concrete originated from the use of concrete for many years in conjunction with timber piles for the construction of sea coast and river works. Concrete served the purpose of protecting the wood from decay and from the ravages of wood boring insects. In harbour works in America the common practice adopted is to place concrete round previously driven piles within thin timber boxing or earthen ware sewer pipes. When timber boxing is used timber is soon eaten away but the concrete remains to protect the piles. Wharves have been built in Australia by driving piles and encasing them in a concrete wall. In Roehampton wharf this method was adopted and found to answer well, and the adhesion between concrete and timber was very good. When it appeared that such method was effective but costly as the concrete was used only to protect the timber and it seemed that it should be possible to combine the two materials and utilized to their greatest advantage or in other words to reinforce concrete by timber rods embedded in it, George O Case carried out large number of experiments.

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A. C. Banerjee

Abstract

1. Great deal has been written on the subject of water supply but the majority of writers have dealt with it from a higher technical point of view.

2. This article is written for the guidance of the public and landholders when contemplating the provision or improvement of a village water supply scheme.

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A. C. Banerjee

Abstract

Pure and plentiful water supply at a reasonable cost is not only an important but an absolute necessity to all classes of human beings. Natural supplies of water vary from springs coming from great depths to rivers. Such water contains a great variety impurities and in different proportions. These can be divided into organic, and inorganic impurities and again subdivided into soluble and insoluble impurities.

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