Most of the attention on organics in the carbon accounting world is focussed on diverting food waste from landfills, and rightly so – but using compost, especially to sequester carbon is also an important part of the equation. This talk will describe efforts to monetize applying compost to rangeland (65% of compost in CA goes… Continue reading USE.327-Monetizing Carbon Farming with Carbon Credits -AC26.USCC
Category: Using Compost
USE.326-Long-Term Field Trial of Compost Application in a Corn-Whe…-AC26.USCC
A six-year field trial in Northern Italy (2018–2024) compared three compost types—FGC (food + green waste), FGCdig (anaerobically digested food + green waste), and BGW (biosolids + green waste)—against chemical fertilization and an unfertilized control. Two strategies were tested: annual compost application (Carbon Sink Trial) and compost every three years with mineral nitrogen in between… Continue reading USE.326-Long-Term Field Trial of Compost Application in a Corn-Whe…-AC26.USCC
USE.244-Topsoil as a Value Added Compost Product-AC26.USCC
This presentation explores how compost facilities can move beyond producing STA-certified compost to creating value-added products, using manufactured topsoil as a case study from the Hudson Valley, New York. It will cover soil characteristics, cost structures, and practical dos and don’ts for developing topsoil products. While based on Northeast research, the concepts and lessons apply… Continue reading USE.244-Topsoil as a Value Added Compost Product-AC26.USCC
USE.243-Soil Biology for Drought Resilience – Reducing Irrigation …-AC26.USCC
This two-year study in Irvine, CA, examined whether biologically active compost and compost extracts could improve soil health and reduce irrigation needs in a retail landscape The content of this course is covered by Copyright and Licensing, Privacy and Terms of Service and Use and shall not be reprinted, reused or re-sold. For full terms… Continue reading USE.243-Soil Biology for Drought Resilience – Reducing Irrigation …-AC26.USCC
USE.325-Compost Without Compromise: Maintaining Crop-Available Nit…-AC26.CREF
This study examined co-application of compost and urine-recovered ammonium sulfate in short-season vegetable systems. Compost alone caused nitrogen immobilization, but combining it with medium or high fertilizer rates provided net plant-available nitrogen while doubling soil carbon storage in high compost treatments. Results suggest that pairing compost with recycled fertilizer can enhance nitrogen availability and sequester… Continue reading USE.325-Compost Without Compromise: Maintaining Crop-Available Nit…-AC26.CREF
USE.242-Compost Biochar and Combined Applications Improve Soil Mo…-AC26.CREF
This study in Maine wild blueberry fields found that compost and compost-plus-biochar applications improved soil nutrient levels (boron, calcium, magnesium, potassium) and increased soil moisture by up to 12 percentage points during dry periods. Foliar nutrient levels also increased, though no yield changes were observed in 2024. The results suggest that compost and biochar enhance… Continue reading USE.242-Compost Biochar and Combined Applications Improve Soil Mo…-AC26.CREF
USE.241-Nitrogen mineralization dynamics of California composts in…-AC26.CREF
This session evaluated how different California-produced composts perform when replacing 30% of mineral nitrogen in tomato production. Results showed that nitrogen availability varied by compost type, largely due to C/N ratios, and that substituting compost for inorganic fertilizer significantly reduced nitrous oxide emissions. The findings highlight compost’s potential to improve nitrogen use efficiency and lower… Continue reading USE.241-Nitrogen mineralization dynamics of California composts in…-AC26.CREF
USE.240-Impacts of Compost on Urban Soil Profile Health and its Cl…-AC26.CREF
This session examined the impacts of compost application in urban parks in California under state organic waste diversion requirements. After two years of compost use and comparisons with parks that had 30 years of applications, researchers found increases in soil carbon, nitrogen, and microbial biomass—especially at long-term sites, where carbon gains extended up to one… Continue reading USE.240-Impacts of Compost on Urban Soil Profile Health and its Cl…-AC26.CREF
USE.122-Basics of Product Registration Labeling and Certification…-AC26.USCC
This session explains state regulations for registering and marketing compost products as soil amendments or fertilizers. It covers product registration, labeling requirements, fees, allowable claims, and compliance challenges, including changing interpretations by state Control Officials. Attendees will learn the steps for registration, common pitfalls, typical costs, and how to list products for organic use through… Continue reading USE.122-Basics of Product Registration Labeling and Certification…-AC26.USCC
USE.121-Municipal Composting Lessons from USDA’s Composting and …-AC25.USCC
This session will showcase the USDA’s Composting and Food Waste Reduction Program, highlighting successful projects like those from the City of Phoenix and Tucson Unified School District. Attendees will learn about the program’s impact on food waste diversion, challenges faced, and strategies for success, encouraging more communities to apply for funding to address food loss… Continue reading USE.121-Municipal Composting Lessons from USDA’s Composting and …-AC25.USCC