Informatics Publishing Limited

H. Lal , Charan Singh , D. N. Puri , M. K. Vishwanatham

Abstract

A field experiment was conducted for nine years (1986-1995) to study the effect of plant spacing of Eucalyptus hybrid grown in association with Chrysopogon fulvus on plant growth, fresh and dry matter production and nutrients uptake of both tree and grass on degraded bouldery riverbed land of Do on Valley. It is evident from study that Eucalyptus hybrid planted at 3m x 1.5m spacing with Chrysopogon fulvus was found optimum with regard to plant growth, survival, dry matter production and nutrients uptake as compared to 3mx1m and 3mx3m spacings. Similarly, Chrysopogon fulvus grown alone exhibited better plant growth, produced relatively more fresh and dry fodder and improved the nutrients content and their uptake considerably than those grown with Eucalyptus hybrid planted at 3m x 1.5m and 3m x 1m spacings.

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Charan Singh , M. K. Vishwanatham , Nirmal Kumar , M. C. Agarwal

Abstract

Quercus leucotrichophora (Ban Oak), is a most suitable tree species for protective and productive purpose in the degraded lands of higher altitude of North-West Himalayan region. An attempt has been made to explore the possibility of its growing in the lower altitude i.e. in the degraded lands of Doon Valley so that its large scale plantation can be taken up where soil and water conservation measures are to be carried out on priority basis. On the basis of survival, height, collar diameter and diameter at breast height performance from 1986 to 1994, it is possible to grow it on degraded lands of Doon Valley. Moreover, its growth performance in degraded lands are quite encohraging. The regression equations between plant age with individual growth character (i.e. height or collar diameter or diameter at breast height) were also estimated.

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Charan Singh , N. K. Sharma , M. K. Vishwanatham , P. Joshie , S. C. Mohan

Abstract

The present study was carried out under bouldery riverbed lands to study the effect of depth of holes on biomass production and distribution pattern in Grewia optiva. The study indicated that the shallower soil working (50 cm deep) has better rcsponse on total biomass production as compared to deeper soil working (75 and 100 cm). It was recorded that about 1.91 kg leaves and 5.66 kg twigs/tree (average of 4th to 9th year old plantation), can be obtained every year. Among twigs of different categories, the highest quantity was contributed by the twigs of2-5 cm diameter. It was also observed that under degraded lands the biomass production started declining at the early age of rotation.

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