Peukrai et al. (1994) compared ‘Sri Lanka’ hedges with leguminous hedgerows (Leucaena and pigeon
pea) in Pang Ma Pa, Mae Hong Son province, on a slope complex at 900 m elevation with 20-40-%
slope and 1 261 mm of rain per year. The vertical interval of vetiver hedgerows and leguminous
hedgerows was 3.0 m. In 1992-93, a comparison of upland rice and integrated cropping system
planting hedgerows showed that they were both good for soil and water conservation in which the soil
of both strips was only 29 and17 % of farmers’ practice (Fig. 6).