S. N. Raj , Yusuf Ansari , C. P. Upadhyaya , S. N. Adhlkari , B. Mahato , S. M. Mishra , S. Rayamajhi

Abstract

The Sagarnath Forestry Development Project is the largest mechanised plantation initiative in Nepal. Of the 11000 ha planted, around 55% is Eucalyptus and 40% Dalbergia sissoo. In all 20 sites (8 planted with D. sissoo and 12 planted with Eucalyptus) were taken up for study of the diameter and height growth. Most of the plantations were-intercuItivated for periods varying from 1 to 5 years. The age of D. sissoo plantations ranged from 3 to 25 years while those of Eucalyptus was from 3 to 13 years. Regression equations for Age/Diameter and Diameter/Height were established for both the species under intercropped and not intercropped conditions. It was observed that intercropping gives initially good start to the plants, however in the long run, the growth is determined by the site potential and the impact of intercropping is nullified. It was seen that upto the age of 3 years the diameter gTowth of both Eucalyptus and D. sissoo was equal while between 3 to 11 years Eucalyptus had better growth than D. sissoo. However thereafter D. sissoo has better diameter growth. Regarding volume (O.B.) production in Eucalyptus the average scenario from the (8-13 years age) data of Eucalyptus gave productivity of 15.86 m³/ha/year while the best scenario (9 years of age) gave a figure of 31.01 m³/ha/year and the worst scenario gave a figure of 6.44 m³/ha/year for 13 years old plantation. In case of D. sissoo the average Volume (O.B.) production at 15 years was 11.17 m³/ha/year and at 25 years it was 15.35 m³/ha/year.

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S. N. Raj , C. R. Sarma

Abstract

Anthocephalus chinensis plantations raised at 5 different spacings viz, 6'×6', 6'×12', 12' × 12',8 5'×8.5' and 12'×12' (Quincunx) were studied to identify the spacing that gave the best growth. The spacing of 12'×12' is found to give best growth; besides 8.5'×8.5' is also found to give similar growth rate and having additional advantage of having more number of trees in a given area.

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S. N. Raj

Abstract

In the present study, the rate of basal area increments in four Linear Tree Increment plota. In tropical rain forests of Western Ghats-Karnataka (India), has been determined. The findings are based on the analysis of five yearly diameter measurements of individual tree from 1939 to 1975. The basal area of the trees which were illicitly removed or which died, during tbe period of observation, has been taken into consideration while computing the increase over the initial. Basal area increments of 95 species bas been determined. In addition the average basal area per hectare and average volume production per hectare has also been predicted.

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S. N. Raj

Abstract

Nursery and regeneration technique of nine species of Southern Tropical Wet Evergreen and Semi-evergreen Forests of Karnataka (India) has been suggested. The study was conducted in three nurseries located at different places, with different soil and rainfull. Length of ischolar_mains and shoots of seedlings, selected at random, has been recorded. The ischolar_main system of seedlings has been studied and described. A brief description of fruiting behaviour. Seed collection and handling, Natural and Artificial regeneration and the distribution of the species is also given. The species covered in the present study are Callophyllum elatum, Conarium strictum, Dipterocarpus turbinatus, Elaeocarpus tuberculatus, Hopea parviflora, Lophopetalum wightianum, Mesua ferrea, Persia macrantha and Vateria indica.

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