Article Index
1. Botany & Varieties
2. Vetiver types
3. Chemical Constituents
4. Medicinal Properties & Use
5. Soil & Climate
6. Propagation
7. Planting & Aftercare
8. Pest & Diseases
9. Harvest & Processing
Vetiver Cultivation in Sandy Tracts
All Pages

Harvest & processing

Roots are harvested after 15 24 months of planting but for maximum oil yield of good quality at 18 months.
 Crop is generally har¬vested during December-February by digging out clump along with its roots.
Length of roots varies from 10 35 cm.
Roots are washed and dried under shade for 1 2 days which improves olfactory quality of essential oil.
Prolonged drying in sun reduces oil yield. On an average, root yield is 1.5 t/acre from a two year crop.

Oil is extracted through hydro or steam distillation. Both fresh and dry roots can be distilled.   To obtain maximum oil yield and to shorten time of distillation, roots should be distilled when fresh.  Oil obtained from stored roots is more viscous and possesses a slightly better aroma than that obtained from freshly harvested roots.
About 36 - 72 hours are required for distillation.  Valuable quality constituents are obtained in high boiling fractions.
Two distinct fractions one lighter than water and other heavier than water are obtained from vetiver. Heavier the oil better the quality. These fractions should be collected separately and later mixed together.
Water content is totally removed by exposing to sun in an open container or by using a centrifuge.

Oil recovery
From fresh roots  0.3 0.8%
From dried roots 0.5 3.0% depending up on duration of distillation.

On an average, oil recovery is around 1% only on dry weight basis and 15 25 kg oil is obtained per acre per crop.