The planting of vetiver in the catchment area, bath. Planted along the level surrounding the reservoir. Number 3 is the concept. Trend 1 high level practice, cultivate equal to catchment level. Concept 2, planted along the high water level 20 cm.. Vertical 3-planting along the lower catchment level 20 cm (because water is often not up to the level of nanoparticles.)
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