Local Name : Hollong (Assamese)
Scientific Name: Dipterocarpus retusus Blume
English Name : Hollong
| Bark | Smooth |
| Commercial Value | Timber |
| Final Financial Return | ₹30,000-₹40,000 |
| Final Harvesting Period | 40 Years-60 Years and 60 Years-100 Years |
| Flower Color | White and Red |
| Flowering Time | July, June, May, September, August, October and November |
| Fruit Type | Winged |
| Fruiting Time | January and December |
| Growth Rate | Moderate Fast |
| Leaf Shape | Oblong |
| Nursery technique | Seed viability is 3-7 days. No of seeds per kg is 60-80 nos. (Dry wt.). Because of less viability of the seeds, nursery beds are prepared in advance. Seeds are collected, wings are removed and directly dibbled in polypot/mother bed. The micropyle end of seed is kept upward in the soil. The medium for polypot or mother bed is prepared consisting of sand, river silt, vermicompost/cowdung in 1:1:1 proportion. The procedure must be done in place where abundant sunlight is available. |
| Plant parts used | Wood |
| Planting mechanism | One year old seedlings are ready for planting during rainy season. Spacing 4m x 4m. May be planted as mixed or pure crop. |
| Seed Collection Time | April and March |
| Site Suitability | Upper Assam |
| Tree Character | Evergreen |
