Informatics Publishing Limited

V. Kothiyal , R. Bhandari , V. K. Jain

Abstract

Many wood species have been planted under social forestry/agroforestry programmes in the country in the last few years with a view mainly to increase green cover and meet the local needs for timber, fodder and food etc. However available scientific data on the utilization aspects of harvested timber appears to have remained in the back seat while selecting timber species for plantation. This resulted in production of timbers which were either marginally suitable for utilisation of various wood products or required development of the suitable processing technology before being put to use. This paper focuses on the need for adopting a holistic approach while choosing timber species for plantation on the basis of scientific input from various angles. Natural durability and treatibility (ease of treatment with preservative) is the foremost requirement for utilization of solid timber for any given end use such as in agricultural implements, furniture, rural housing and construction etc. The second requirement is the physical and mechanical properties of timbers, which ultimately determine its suitability for the desired end use/industrial application. The timbers with multi-utility can be given tbe next importance. Plantation timber species have been grouped based on the above parameters, It is suggested that these requirements coupled with growth paratpeters in different agro climatic zones may be used for prioritizing the species for plantation. It is suggested that the species placed in the higher group may be given preference to that in the lower groups for maximum benefit to the society.

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R. Vijendra Rao , S. Shashikala , P. Sreevani , V. Kothiyal

Abstract

The basic density and anatomical properties of five clones of Eucalyptus tereticornis developed by ITC Bhadrachalam are reported. Tbe five clones represented by four trees each, of 4-5 year old were from Sarapaka demonstration plot, Andhra Pradesh, India. Intra-clonal variation was significant in basic density, vessel diameter, vessel element length, fibre length, fibre diameter, fibre wall thickness, while variation in tissue proportions were non-significant. However, inter-clonal variation was significant for all the parameters. Basic density was positively correlated with vessel diameter and percentage of rays, while girth had a negative influence on fibre diameter and fibre wall thickness. Fibre length, fibre diameter and fibre lumen diameter were positively inter-correlated, while negative correlations were observed among the tissue proportions. Vessel diameter was also correlated positively with ray percentage and negatively with vessel percentage. All these correlations are suggestive of spatial adjustments in quantitative characteristics among different cell types.

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V. Kothiyal , R. Sudheendra , R. V. Rao

Abstract

Specific gravity and some of the mechanical prperties of five clones of Eucalyptus tereticornis Sm. developed by ITC Bhadrachalam are reported in this paper. The five clones represented by four trees each of four and half years of age studied are from Sarapakka (Andhra Pradesh) grown on red soil. The results were compared with values reported for the same clones of even age group from Cherupally (Andhra Pradesh) demonstration plot grown on black soil. Clone number 4 had overall better mechanical properties having highest value for all the properties; followed by clone 6.

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R. V. Rao , V. Kothiyal , P. Sreevani , S. Shashikala , S. Naithani , S. V. Singh

Abstract

Five trees of four and half years old growth representing 5 clones of Eucalyptus tereticornis Sm. Obtained from ITC Bhadrachalam Paper Boards, Andhra Pradesh, India were evaluated for pulp yield and strength properties. Variation in pulp yield, kappa number, holocellulose and lignin content, strength and anatomical properties was observed in five clones. Clone 3 yielded more pulp. The pulps of all the clones tested have adequate strength properties. Basic information on anatomical properties were also provided in the paper.

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