BIOCHAR FAQ

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​What is Biochar?

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Biochar is a form of charcoal produced from organic materials like wood, crop residues, or other biomass through pyrolysis (burning in low-oxygen conditions). It enhances soil health by improving fertility, water retention, and carbon sequestration.

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What are the benefits of using biochar in farming?

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Improves Soil Structure: Biochar enhances soil porosity, improving aeration and water retention.

Increases Water Holding Capacity: Biochar helps soils retain more water, reducing irrigation needs and improving drought resilience.

Boosts Soil Fertility: It provides a habitat for beneficial soil microbes and retains nutrients, preventing them from leaching away.

Enhances Carbon Sequestration: Biochar locks carbon in the soil for hundreds to thousands of years, contributing to climate change mitigation.

Reduces the Need for Chemical Fertilizers: Biochar's increased nutrient retention and microbial activity reduce reliance on chemical inputs, promoting sustainable agriculture.

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How much biochar should I apply per hectare?

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The recommended application rate for biochar varies depending on soil type and crop needs, but generally, 3-10 tons per hectare is a good range for most agricultural soils.

Note: Start with a smaller amount (e.g., 3 tons per hectare) and gradually increase based on soil response and crop performance.

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How do I apply biochar to my fields?

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Incorporate Biochar into Soil: Mix biochar into the topsoil to a depth of about 10-15 cm using conventional tilling equipment. This ensures even distribution and maximises its benefits.

Combine with Organic Matter: Mix biochar with compost or manure before application for best results. This “charging” method infuses biochar with nutrients and beneficial microbes, enhancing its effectiveness.

 

How does biochar interact with microbial soil enhancers?

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Habitat for Microbes: Biochar provides a porous structure that acts as a habitat for beneficial microbes, helping them establish and thrive in the soil.

Improved Nutrient Availability: When combined with microbial soil enhancers, biochar retains nutrients made available by microbes, ensuring they are accessible to plants for extended periods.

Enhanced Microbial Activity: Biochar and microbial soil enhancers work synergistically. Biochar supports microbial populations, while soil enhancers further boost these populations, enhancing soil fertility and crop growth.

Application Sequence: For best results, apply biochar first and incorporate it into the soil. About ten days later, follow with microbial soil enhancers (e.g., Growpro) to allow microbes to populate the biochar's porous structure.

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How long does biochar last in the soil?

 

Biochar is highly stable and can last in the soil for hundreds to thousands of years, making it a compelling long-term investment for soil improvement and carbon sequestration.

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Can biochar be used with other soil amendments like fertilisers?

 

Yes, biochar can be used alongside organic fertilisers, compost, and microbial soil enhancers. Biochar improves the efficiency of these inputs by retaining nutrients and providing a habitat for beneficial organisms.

 

What crops benefit the most from biochar application?

 

Biochar benefits most crops, including cereals, vegetables, fruits, and legumes. Its ability to improve soil structure, water retention, and nutrient availability makes it versatile across various farming systems.

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When is the best time to apply biochar?

 

Biochar can be applied during soil preparation or off-season soil enrichment activities before planting. This allows it to be incorporated thoroughly into the soil and interact with other soil amendments like compost or microbial soil enhancers.

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Is biochar safe for all soil types?

 

Biochar is generally safe and beneficial for most soil types. However, monitoring soil pH and organic matter levels is crucial, as high application rates could alter soil properties. Always start with recommended rates and adjust based on soil conditions.

Integrating biochar into your farming system can enhance soil health, increase yields, and contribute to sustainable agriculture practices. For more information, contact our team for tailored advice on making the most of biochar on your farm.