Rice Husk Ash & How to Make Them
- 2 min reading time
Rice Husk Ash and Natural Farming
Rice husk ash is closely associated with the principles of natural farming, a concept proposed by the Japanese agricultural philosopher Mokichi Okada in the 1930s. Natural farming is an agricultural approach that emphasizes avoiding synthetic fertilizers and pesticides, instead relying on the inherent fertility and biological strength of the soil. By respecting natural processes and maintaining soil health, this method aims to produce stable yields of nutritious crops while supporting long-term environmental sustainability.
This philosophy places strong emphasis on preserving soil purity and has been widely practiced and promoted through systems such as MOA Natural Farming. It also reflects philosophical influences from ancient Chinese thinkers such as Laozi, Zhuangzi, and Mencius, who emphasized harmony between humans and nature. As a result, rice husk ash has become widely used in Japan and other countries as a practical tool for improving soil health within natural farming systems.
How to Make Rice Husk Ash
A rice husk ash kiln provides a simple and efficient way to produce large quantities of rice husk ash to meet the needs of gardening, horticulture, and agricultural production. Below is a step-by-step guide using the Biochar Station rice husk ash kiln as an example.
Required Materials
- Rice husk ash kiln
- Rice husks
- Lighter or matches
- Combustible starter materials (e.g., paper, wood shavings)
Step 1: Set Up the Kiln
Install the rice husk ash kiln by placing the chimney securely onto the base. After installation, gently shake the unit to ensure it is stable.
Next, evenly spread the rice husks around the kiln. Depending on the desired production volume, the rice husks can be piled up close to the height of the chimney, but they should not exceed the chimney height.
If an old metal drum (such as a used oil or gasoline drum) is available, placing the kiln inside the drum can help the burning process become more even and controlled.
Step 2: Ignite the Fire
Place a small amount of combustible material inside the base of the kiln and ignite it using a lighter or matches.
Once the starter material begins to burn, the flame will gradually spread to the surrounding rice husks, initiating the carbonization process.
Step 3: Complete the Carbonization
Allow the process to continue for approximately 1.5 hours, or until all the rice husks have turned black.
At this point, the rice husk ash production process is complete.
Video Demonstration
Below is a video demonstration showing how to use the Biochar Station rice husk ash kiln to produce rice husk charcoal quickly and efficiently.
https://youtube.com/shorts/cByoHjjGvWM?si=Ekl8CnEsYqDlgueo
