R. K. Jain , V. K. Garg

Abstract

A field study was conducted to compare the influence of a Eucalyptus hybrid, Prosopisjuliflora and Terminalia arjuna plantations of about one decade old on the physico-chemical properties while revegetating sodic wasteland at Biomass Research Centre in Banthra (of National Botanical Research Institute, Lucknow) India. The relative effectiveness of these species in enrichment/improvement of the sodic soil was in the order of P. juliflora > T. arjuna > E. hybrid. Results of experiments have also indicated that the pattern of tree ischolar_mains growth synchronised with the depth of improvement and helped in an accumulation and retranslocation of soil nutrients for developing soil vegetation system on such sites.

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S. C. Verma , R. K. Jain , M. V. Rao. P. N. Misra , Andra S. Murty

Abstract

The canopy of different trees have greatly influenced the soil composition of alkali soil due to humus deposition. A great heterogeneity has been observed in the chemical contents of forest soil depending upon the litter types produced by heterogel0us forest composition. The paper deals with the degree of reclamation of usar soil in Banthra forest under different canopy. It was observed that the mixed canopy of Acacia nilotica, Syzygium sissoo has reduced the pH (0-30 cm soil depth) to normal and increased the organic matter of soil followed by other mixed canopies and single species canopy.

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Vipin K. Chawla , Ranjana Yadav , C. N. Pandey , R. K. Jain , A. K. Dixit

Abstract

Lignin-phenol-formaldehyde (LPF) resins were produced by substituting phenol with rice straw lignin in various percentages. Wood adhesive is certainly the most widely explored avenue of lignin utilization. Phenol was replaced by various percentages of lignin to keep the phenolic to formalin weight ratio constant to 1:1.8. 10%, 20% and 30% replacement of phenol by lignin were adopted in making lignin phenol formaldehyde resin (LPF Resin). The plywood panels of 4 mm thick, 30 × 30cm were made and the panels were subjected to test as per IS: 848:2006, specification for synthetic resin adhesives for plywood (Phenolic and Amino plastics). The results indicated that rice straw lignin was a feasible replacement for up to 30% of the phenol in PF resins.

Keywords

Rice Straw Lignin, Adhesive, Plywood

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