DBH Thresholds & Age Requirements for Agarwood Resin Induction – Tree Readiness Standards under the BarIno™ System
Successful agarwood resin induction depends less on the inoculant and more on tree physiological readiness.
Under the BarIno™ Integrated Inoculation System, DBH (Diameter at Breast Height) and tree age are treated as non-negotiable entry criteria.
1. Why DBH Matters More Than Age Alone
DBH reflects:
- Xylem volume available for resin deposition
- Cambial thickness and vitality
- Ability of the tree to tolerate stress
- Probability of survival after induction
Age without sufficient DBH results in:
- Weak defense response
- Limited resin formation
- High mortality risk
DBH is the primary indicator; age is the supporting indicator.
2. Standard DBH Classes (BarIno™ Reference)
DBH is measured at 1.3 meters (4.5 ft) above ground level.
| DBH Class | Diameter (cm) | Tree Condition | Induction Status |
|---|---|---|---|
| Class A | <10 cm | Juvenile | ❌ Not allowed |
| Class B | 10–14 cm | Immature | ⚠ Restricted |
| Class C | 15–19 cm | Early mature | ✅ Limited induction |
| Class D | 20–24 cm | Mature | ✅ Standard induction |
| Class E | ≥25 cm | Fully mature | ✅ Premium induction |
3. Minimum Age Requirements (Indicative)
Age varies by species, site quality, and management. DBH must always be verified.
| DBH Class | Approx. Age | Induction Recommendation |
|---|---|---|
| <10 cm | <4 years | No induction |
| 10–14 cm | 4–6 years | AgarStart™ only (optional) |
| 15–19 cm | 6–8 years | FusaPrime™ (light protocol) |
| 20–24 cm | 8–10 years | Full BarIno™ sequence |
| ≥25 cm | 10+ years | All products, premium cycles |
4. BarIno™ Product Entry by DBH Class
| Product | Minimum DBH | Notes |
|---|---|---|
| AgarStart™ | ≥10 cm | Tree activation only |
| FusaPrime™ | ≥15 cm | Biological induction |
| FusaTrinity™ | ≥18–20 cm | Dual induction |
| Harmonia™ | ≥20 cm | Long-term maturation |
| ResinRush™ | ≥20 cm | Amplification phase |
| FusaBlaze™ | ≥22–25 cm | Densification phase |
5. Induction Risk by Undersized Trees
| Issue | Cause |
|---|---|
| Tree death | Insufficient vascular capacity |
| Shallow resin | Limited xylem volume |
| Uneven induction | Poor sap flow |
| Disease collapse | Overwhelmed defense response |
BarIno™ does not recommend induction below threshold DBH under any circumstances.
6. Field Verification Checklist
Before induction, confirm:
- DBH measured correctly (tape or caliper)
- No major pest infestation
- Healthy canopy and active growth
- No water stress or nutrient deficiency
- Tree tagged and documented
7. Training Rule of Thumb (Farmer-Friendly)
If your arms can’t comfortably wrap the tree, don’t inoculate yet.
Wait for the tree to grow—the resin will be better.
8. Certification & Compliance Note
BarIno™ DBH thresholds:
- Protect farmer investment
- Improve yield predictability
- Reduce mortality
- Support environmental compliance
- Strengthen buyer confidence
BarIno™ Readiness Principle
A mature tree produces agarwood. An immature tree produces loss.