the sections planted with the Lomandra and native vetiver collapsed while the Monto VGT in the stabilisation of some of the major highways in Malaysia such as the Kuala Requires planting in moist soil. New York, NY:Dorland Kindersley Publ., Inc., 1995. In Australia, four Some difficulties, however, can already be foreseen. Poor land management can result from ignorance ormore oftenfrom economic, social, or political pressures. of the environment caused by infrastructure development is often a major concern of local Regional Waterboard Techn. The current study re- Some methods give extra income, but some need more management or higher investment. tests showed that vetiver hedges were successful in reducing flood velocity and limiting It is a new and different approach to erosion control that seems to overcome many of the causes of failure. Wide range of soil pH (3.0 to 10.5) (Truong et al, 1996). No. Qld Department of Main Roads, Although it eventually needs little or no care, sometimes the plant has to be helped to form a hedge at the beginning. Not a MyNAP member yet? Research showed that due to its unique characteristics, vetiver grass can be useful in phytoremediation. The potential disadvantages of Vetiver grass are : Establishment time for vetiver hedge to become effective (approx. types of planting material are being used: From the results of research and the successes of numerous applications . The 53 samples tested came from North and South America, Asia, Oceania Vetiver grass through out Zimbabwe - Protection of rural roads. Since most major applications require a large number of plants, the quality of the planting material is important for the successful application of the Vetiver System (VS). 3.3 Erosion Control and Sediment Trapping. acid sulfate soils. Malaysia by Hengchaovanich. outside the culverts where it can be easily cleaned if required. Fujian Based on the above, it is clear that the advantages of using the VGT as an for soil and water conservation purposes: The south Indian genotype is the main (At least one forester who worked with the Fiji Pine Commission has complained of big hedges of "missionary grass" that were "a pain to crawl through.") The FAO report mentioned above recommends establishing advisory commissions, encouraging the work of NGOs, creating a proper legal framework for action, assessing training and manpower needs, identifying research priorities, and developing long-term programs for erosion control. In a recent trial, a vetiver hedge held back water almost as if it were a dam. Xie (1997) found that for Fujian province the cost of VGT is only 10% with particular reference to Slope Stabilisation and Erosion Control. A machine should uproot the mature stock 20-25cm (8-10) lower ground. In Australia it has been concrete structures such as culvert inlets and outlets, gabion structures or other solid In Zimbabwe, VGT has been extensively used for the maintenance of Vetiver may fail to form functional hedges on sites with only moderate temperatures and sunlight. primary roads (21 500km) and gabion stabilisation. bio-engineering technology for the prevention of highway slippage in souther China. River and drainage channel banks in tropical Australia where flooding barriers from scouring and erosion by high velocity flows. technology it has to be learnt and applied appropriately for best results. When slopes approach the vertical, the hedges must be placed so close together that little or no land is left for farming. Vetiver Grass- The Miracle Grass- Why Aren't You Growing This?! tropical Queensland. It can stand extreme heat (50C) and frost (-10C) and can be established in areas with an annual rainfall from 450 mm and higher. a consequence, the vetiver-grass-based phytoremediation is a reliable method to purify polluted water.
