Compost Tea & Leaf Sap Analysis, explained by a Regenerative Farmer [Adrian Rubi]

What happens when a farmer becomes a microbiologist? Adrian Rubi shares how compost tea, leaf sap analysis, and on-farm ferments can help you cut inputs, strengthen crops, and speed up your regenerative agriculture transition. From recipe design and dissolved oxygen to trace-element tweaks and manure management, this is soil microbiology you can actually use. 

Why listen: Reduce fertilizer costs, improve plant health, and scale nature-based solutions with tools you can brew and measure on-farm. 

Inside This Episode:

• 🌾 Transitioning the Swiss hillside farm: organic suckler cows, hazelnuts, and local feeds only. 

• 🧪 Compost tea ≠ fertilizer: secondary metabolites, foliar benefits, and practical application rates. 

• ⚙️ Brewer design that keeps biology aerobic and consistent (stainless steel, vortex flow, DO control). 

• 🌿 Leaf sap analysis to target trace elements, avoid over-fertilizing, and keep photosynthesis high. 

• 🧴 Ferments for manure pits and cover-crop mulch: fewer smells, healthier N cycling.

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Produced in partnership with Soil Capital, a company accelerating the regenerative transition by financially rewarding farmers who improve soil health & biodiversity.

https://www.soilcapital.com/

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Usefull Links:

• EDAPRO: https://edapro.ch/en/

• ALTERHUS FARM: https://www.instagram.com/halterhus/

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