The rainfall lost as runoff with
no vetiver (control plot) was 24.8 % compared to 7.7, 11.5 and 11.6% lost on the green structure plots
at spacings of 5, 15 and 25 m, respectively. Soil loss on the no vetiver plot was 40 times higher than the
acceptable soil loss limit of 12 t.ha-1 yr-1 for the tropics, whereas the soil loss on plots under vetiver at
spacings of 5, 15 and 25 m was 1.4, 6.8 and 6.5 times higher than the acceptable limit.
The rainfall lost as runoff withno vetiver (control plot) was 24.8 % compared to 7.7, 11.5 and 11.6% lost on the green structure plotsat spacings of 5, 15 and 25 m, respectively. Soil loss on the no vetiver plot was 40 times higher than theacceptable soil loss limit of 12 t.ha-1 yr-1 for the tropics, whereas the soil loss on plots under vetiver atspacings of 5, 15 and 25 m was 1.4, 6.8 and 6.5 times higher than the acceptable limit.
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