Informatics Publishing Limited

S. K. Banerjee , M. K. Kashyap , Amit Sahai

Abstract

The dependent changes in species composition, nutrient status and biological activity of manganese mine overburden spoils of Ukwa, Balaghat District of Madhya Pradesh in relation to age have been assessed. The results indicate that the number of species increased as a function of the age of the overburdens. A good number of leguminous species was observed in different sites which is an indication of gradual improvement of the fertility status ofthe spoil. As the overburden got invaded by vegetation with time organic carbon and nitrogen went up with a peak in natural forest area. Available P and available K also increased significantly with the increase of the age spoils. The population of all the organisms (bacteria, actinomycetes and fungi) increased sharply with the increase of the age of the overburden. A highly significant positive correlation was obtained between the number of plant species and organic carbon of the spoils. Significant positive correlation was also obtained between the number of organisms and organic carbon, total and available nitrogen, available P and available K.

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P. Jalil , M. K. Kashyap

Abstract

A study was conducted to assess the flowering responses inAzadirachta indica through various methods of grafting. In this study three methods of grafting (Cleft grafting, Side grafting and Budding) were tried. Among these, cleft grafting was found most sucessful for A. indica. It was also found that cleft grafting gives better and early flowering responses than other methods after three years of grafting. Neem is a slow growing species from seeds and takes more than 15 years to attain flowering and seed production. The study shows that it can be minimized through grafting.

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