A quick guide on making carbonized rice hull (CRH)

Photo screen captured from the AgriTalk's webinar on Carbonized Rice Hull.

Behind healthy, successful plants is an excellent growing medium. Carbonized Rice Hull (CRH) is one of the many components that make for a good potting mix. CRH is the output of partially burnt rice hulls, or ipa in Tagalog. It is used as a fertilizer and soil conditioner for plant cultivation. 

AgriTalk’s online series titled “AgriTalk: 2 Easy Learning” demonstrated the steps to make CRH. 

Photo screen captured from the AgriTalk’s webinar on Carbonized Rice Hull.

AgriTalk 2021 is a free virtual webinar in partnership with Agriculture Magazine and the Department of Agriculture-Agricultural Training Institute (ATI). The ongoing series is available via the ATI and Agriculture Monthly’s Facebook pages. 


First, prepare the things needed to make this fertilizer. This includes the carbonizer, shovel, firewood, lighter, gas or kerosene, watering can, and of course, the rice hull.  

Pour the gas on the pieces of shredded wood and build a fire using a lighter. Once the flame has become bigger and stable, position the carbonizer in the middle. 

Pour and spread the rice hull around the carbonizer until it covers the whole body. 

If the rice hull on the surface starts to turn black, mix it using the shovel. Continue mixing until all of it turns black.

Remove the carbonizer, then sprinkle the burnt rice hull with water to put out the fire. Let the carbonized rice hull cool before storing it in a sack. 

There you have it. You can now use the CRH for your garden. 

To watch the seventh episode of AgriTalk’s online series, click here

For more information, message ATI’s Farmers’ Contact Center at 09209462474.  

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Vina Medenilla
Vina Medenilla is a content producer for Agriculture Monthly magazine. She is a graduate from Miriam College with a bachelor’s degree in Communication. Fashion, photography, and travel are some of the things she loves. For her, connection with nature is essential to one’s life.

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