1. Definition
Humic acid is a permanent humic substance and cannot be degraded that fast by the microorganisms of the soiIt is natural additive for fertilizer to improve the structure of the soil also to increase the fertility.Humic acid,extracted from leonardite is natural additive for fertilizer to improve the structure of the soil also to increase the fertility.Most important, can increase the yield by 15%-20%
2. Specification
| Appearance | Black Powder |
| Organic Matter(dry basis) | 85.0%min |
| Humic Acid(dry basis) | 70.0%min |
| Nitrogen( organic) | 0.3% |
| Fe | 0.1% |
| P2O5 | 0.02% |
| C.E.C | 300meq/100gmin |
| pH | 4.0-6.0 |
3. Function
1),Improve the structure of soil ,increase the buffering power of soil.
2),Neutralize both acidic and alkaline soil, regulate the PH-value of soil.
3),Stimulate plant growth, increase the yield and quality.
4),Reduce nitrate leaking into the groundwater and protect the underground water
5),Increase the effectiveness of herbicide, pesticide and fungicide,immobilize or
reduce their harmful residues.
4. Direction for use
Base fertilizer:
For field crop, 50-100kgs/ha per crop season.
For fruit trees, 1-2kgs per plant.
For vegetables, 1-2kg/m2.
Mix additive: 30-60kgs per ton of composite.
5. Contat Information
Contact Person: Harvey.xing
Email: harvey.xing@dongeshengda.com
Whatsapp: 008613780742156
Skype: live:harvey.xing
