Petaluma Community Guild Guild Compost Forum — Joshua Beniston: No-Till Soil Management
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Transcript of Petaluma Community Guild Guild Compost Forum — Joshua Beniston: No-Till Soil Management
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No-Till Management for Soil Health
Josh Beniston, PhD
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What is soil structure ?
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Figure from Jacke and Toensmeier (2005)
Soil Structure
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Figure from Brady and Weil
Formation of Soil Aggregates
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How do soils hold Carbon ?
1. In living biomass (microbes, etc.).2. Organic materials are surrounded by soil
aggregates.3. Small organic molecules bind to the surface
of soil clays.4. Some organic materials occur in forms that
are resistant to decomposition (biochar).
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Figure from Jacke and Toensmeier (2005)
1. Living Biomass
2. Inside soil aggregates
3. Bound to clay minerals
Soil Structure and Carbon Storage
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Soil Structure and Water Storage
Figure from UN FAO
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No Till AgricultureSoil Structure RestoredSoil Carbon Increases
Natural Vegetation Conventional TillageConventional Tillage
Original Vegetation Steady State Soil Structure and Carbon Dynamics
Tillage Agriculture Soil Structure Disrupted Soil Carbon Depletion
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Photo by J.C. de M. Sa
Industrial No-Till Agriculture
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Industrial No-Till Agriculture
Photo by J.C. de M. Sa
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Photo by J.C. de M. Sa
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Organic No-Till: Crop RollerPhoto from resilience.org
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Organic No-Till: Permanent Raised Beds
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Organic No-Till: Permanent Raised Beds
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Sheet Mulching
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Sustainable Agriculture Classes at Santa Rosa Junior College
• Soil Science and Plant Nutrition (AGRI 60) Spring and Fall
• Composting for Organic Farming and Gardening (SUSAG 103) - Spring
• Intro to Sustainable Agriculture (SUSAG 50) Spring and Fall
• Organic Crop Planning and Production (SUSAG 109) - Spring
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40 years no till - all residues applied as mulch – 5% OM – Coshocton, OH - July 2012
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27 years annual tillage – 1.8% OM –
Coshocton, OH – July 2012 (same day)
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Thank You !
Questions?