Biochar a miracle of permaculture for soil fertility

biochar from activated charcoal in your soil 2

What is biochar and how can it improve soil fertility in growing cannabis?

Biochar is crushed charcoal, used to improve or restore soils, particularly tropical (cultivated or not). Biochar has been used for centuries for soil fertility. And, it has made a comeback in recent decades among farmers ...

Biochar, agricultural coal for soil fertility

soils, fertility, permaculture, biochar

To grow a healthy cannabis plant, with an abundant inflorescence and aromatic aroma, we must first take care of a healthy root system. A growing medium that provides the environment with ideal conditions will increase the chances of high yield production. Here comes biochar, a carbon-rich soil amendment that can help solve some environmental problems.


The origin of the name “Bio-Char” is a combination of the words “Biology” and charcoal. This is organic waste (mainly wood and agricultural waste) that goes through a process called pyrolysis (dry distillation). During this process, the material decomposes under the effect of high temperature heat without the presence of oxygen.

soils, fertility, permaculture, biochar
Biochar proves to be a soil amendment for agriculture

The resulting product is called 'activated carbon' and is characterized by a number of unique characteristics that benefit the plant and the soil, including:

  • Ability to absorb and release substances - the carbon element, made from activated carbon, has one of the particularly high connectivity characteristics. It is therefore able to absorb a large number of elements ... And upon release, these elements make themselves available for the reproduction of the roots of your plants.
  • A lot of porosity - Activated carbon allows a large surface to be treated, thanks to the large quantity of pores covering the material on all sides. This allows the consolidation of beneficial microorganisms for your soil. In addition, mineral adsorption helps improve adhesion and water.
soils, fertility, permaculture, biochar
Results of applying Biochar in soil at different dosages

In addition to the special properties mentioned above, activated carbon can act as a fan in the soil (instead of perlite). This prevents the stress and development of certain diseases in the plant.

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Fertility of "Tara Perta"

According to the Permaculture Research Institute (Permaculture Research Institute), “Terra Preta” (which means “black earth” in Portuguese), is a soil containing naturally active carbon. It was developed by ancient Amazonian cultures around 7000 years ago ...

soils, fertility, permaculture, biochar
Biochar produced locally. Photo: Carbon Gold.

Large deposits of this black soil are present to a depth of 2m in the soil. According to the institute, the first stocks of Tara Perta were already discovered in 1870. But it was not until a decade ago that science began to study the subject in depth.

Differences between biochar, charcoal and activated carbon

Biochar shares similar properties with charcoal and activated carbon. But its unique properties serve better as a soil amendment. Charcoal is used as a high carbon fuel. While biochar harnesses the ability of carbon to provide large amounts of surface area.

soils, fertility, permaculture, biochar
Moss growing on charcoal, after a fire

Biochar does not share the same density or hardness as activated carbon. In this way, its surface is smaller than that of activated carbon. But it is easy to produce and work in your soil.

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Production of biochar

Biochar is produced in an oven. This process can take place on a range of scales from DIY to industrial installation. Regardless of scale, biochar requires the production of biomass (organic matter). This biomass can be obtained in a sustainable manner through forest fuel management work or your own yard waste. On a large scale, you can see all the benefits of biochar ...

soils, fertility, permaculture, biochar
Aspect of the commercial biochar

Once harvested, the chips are transported to the kiln where the biomass is cooked. As the biomass cooks, it releases synthetic gas (synthetic gas). It is captured and cleaned to power the oven and can even be used as natural gas.

As an easy and profitable amendment to produce, the scope of this permaculture miracle is endless ... In parts of Africa, where soil fertility has been destroyed over the last century, biochar can help rebuild damaged floors. And, while maintaining water and nutrients in the soil.

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