Sierra Soil Biology Association

our members (in alphabetical order)

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Samantha Bass, a founding member, works to broaden awareness of soil biology and its benefits to the region's diversified agriculture. She sits on the Nevada County Grown board of directors and regularly helps out on local farms.

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Zach Ellis  

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Casey Ernst, a founding member, is co-owner of Catalyst Bioamendments in Nevada City, CA. He spent nearly a decade managing a regenerative farm in Ecuador before turning to biological management and large-scale compost production.

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Rodney Hiemstra, a founding member, is owner/operator of Green Man, a consultancy based in Alta, CA. He retired from a career in organizational management to study biology-based farming techniques.

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Jennifer Micheli  

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Gregory Munn is a co-founder of Catalyst Bioamendments in Nevada City, CA. With roots in Northern California agriculture, he came to Nevada City to pursue biological farming techniques and large-scale compost production.

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Wesley Sander, a founding member, is owner/operator of Foothill Biological Soil Health Services in Grass Valley, CA. He left a career in agriculture journalism to study biological soil management in farm-production settings.

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Larissa Simmons  

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Brian Vagg, a founding member, is co-owner of Sprouting Soil in Auburn, CA. He left a hi-tech career to pursue biological soil management in homesteading and farm-production settings. He is a Soil Foodweb certified consultant.

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Shelby Vagg, a founding member, is co-owner of Sprouting Soil in Auburn, CA. She left a hi-tech career to pursue soil-biology management and consultation. She teaches homesteading techniques, specializing in food fermentation.

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Alane Weber, a founding member, is owner/operator of Botanical Arts, a consulting firm in Grass Valley, CA. She is a Soil Foodweb certified consultant and instructor, a botanical illustrator and lifelong horticulturist.

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Keisha Wheeler, a founding member, is co-owner of Catalyst Bioamendments in Nevada City, CA. She managed a regenerative farm in Ecuador before turning to soil-biology management and large-scale compost production.