Study of the root system of Vetiver

The root system of Vetiveria zizanioides Nash, was studied under two different planting systems: 1) soil level and 2) planting hills. Four different spacings were tried: 90 x 30, 90 x 90, 120 x 30 and 120x90 centimeters. Soil level planting gave larger production of roots and the spacing of 90 x 30 cm gave the largest amount of roots under both planting systems. Eighty eight percent of the root weight was found in the upper 30cm of soil.