Pinus radiata is the dominant plantation species of New Zealand. Sometimes it can develop wood quality flaw called intra-ring checking. The checks that appear in wood during kiln drying lower value of timber leading to loses for the forest industry. An exhaustive comparative study was conducted to see if the checked wood had some inherent properties that made it more susceptible to checking. It was found that checking could be influenced by tracheid geometry and cell wall thickness. If the wood had large tracheids with thin walls, it was more likely to develop checks during drying. Lignin distribution in the cell wall layers was also seen to play an important role in checking. Lower lignin levels and disruption in the pattern of lignification of the cell wall layers increased the tendency of the wood to develop checks. Similarly, if the tracheids had larger pits then their tendency to check increased. This study(funded by WQI Ltd, New Zealand) was undertaken as a part of collaborative work that was carried out to understand wood quality issues in Pinus radiata, with a vision of improving its wood quality.
This book deals with the impact of urbanization on Lake Ecosystem. There are six chapters in the book where, planning and scientific execution of the work is well done. The outcome of the study is very significant for the restoration and modeling for lake conservation. The longitudinal profile of the lake with hydrodynamics, climatological parameters and the impact of urban settlements are covered. A grid system of mapping to understand the downstream and upstream characteristics of the lake basin are presented. The WQI of the Lake are plotted. The software programme 'HYCH' has been used to know the quality of the water for Irrigational suitability (Handa, Piper, Stuyfzand, USSL and Wilcox). The lake sediments are analysed for grain size pattern and X-ray Diffractometer. The Ecological Modeling of the Dalvoy Lake was made using the statistical model of hydrochemical facies. To manage the nutrients, simulations were made using the PAMOLARE 1 layer model (UNEP-DTIE-IETC and ILEC).