N. K. S. Bora

Abstract

With IncreasIng awarenes of a variety of produrts obtained from the forests, change in utillisation limits, changing utilisation treads, the forest management continues to become more intensive. As such comprehensive studies on forest productivity have become necessary with a view to Increase tbe productivity from our limited forest area and to select proper sites for commercial forestry, so that plantations could be concentrated in areas of maximum productivity. The importances of Cryplomeria japonica a fast growing specte., In this context was long recognised aad large scale plantation of this species was undertaken in the year 1911-20 and subsequently In a systematic manner since 1922 The present study was conducted In 59, 51, 34, 20 and 18 year. old plantations at site. located at 1830 m to 2134 m msl In Himalayan region or West Bengal. The total biomass production ranged from 96 (18 years) to 400 t/ha at 51 years with 62 to 82 per cent being contributed by wood The biomass production Is affected by the altitudinal location or the site. With Increasing elevation the biomass production has decreased. As such maximum biomass was produced in 51 years (925 kg/tree) at Takdah situated at 1830 m msl and minimum In the same age (364 kg/tree) at Ghum Simana located at 2134 m msl. These findings are of Immense practical value In the field of forest management practices.

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J. D. S. Negi , N. K. S. Bora , V. N. Tandon , H. D. Thapliyal

Abstract

The distribution of organic matter in an age series of Eucalyptus globulus plantations in Tamil Nadu has been discussed. The total biomass ranges from 38 tonnes (5 yeas) to 220 tonnes (16 years) per ha with 85 to 88 per cent being contributed by the aboveground parts and 15 to 12 per cent by the ischolar_mains and the average annual production of non-photosynthetic components at its peak (l9 tonness/ha) at the age of 7 years.

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O. N. Kaul , P. B. L. Srivastava , N. K. S. Bora

Abstract

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O. N. Kaul , P. B. L. Srivastava , N. K. S. Bora

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I. M. Qureshi , P. B. L. Srivastava , N. K. S. Bora

Abstract

An investigation was conducted to study the effect of weeding and soil working on the growth and establishment of natural regeneration of sal resulting from a profuse seed crop in 1963 in the F.R.I. Estate. Plots were laid out in three varying light conditions ,viz., (i) in the open, (ii) in partial shade, and (iii) in sal plantations in Demonstration Area. Regular treatments of weeding and soil working were given and survival, height growth and dying-back of seedlings recorded. Besides, moisture and light variations were also measured. The results indicate that both these cultural operations, viz., weeding and soil working are most beneficial in respect of growth and survival of the seedlings in the open and in the partial shade. In the open soil moisture appears to be limiting factor as the growth showed marked improvement in height with weeding and soil working. And since some of the seedlings were putting on vigorous growth their requirements of moisture and nutrient. Resulted in so-to-say 'natural thinning' of the excess number of seedlings with reference to a particular site. In the plantations, the comparatively poor light conditions appear to be responsible for the poor growth and survival though the soil moisture was in no way deficient particularly in weeded and soil worked plots as compared to the other two categories of plots. In partial shade, both soils moisture and light conditions were favourable resulting in both better growth and survival of seedlings. It is concluded that ideal light conditions have to be synchronised with these cultural operations in order to get the best results.

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