Tumbleton Soil Carbon Project

Tumbleton Soil Carbon Project is a soil carbon sequestration project located at the "Tumbleton" property, situated near the village of Wombat, approximately 15km southwest of Young in the South West Slopes region of New South Wales. Registered on April 12, 2024, the project initially covered an area of 1,144 hectares, though a variation in August 2025 removed some areas from the project boundary. The region is well-regarded for mixed farming, supporting both livestock grazing and cropping operations.

The project operates under the Estimation of Soil Organic Carbon Sequestration using Measurement and Models 2021 methodology. This method awards carbon credits for measurable increases in soil carbon stocks resulting from eligible management activities. For the Tumbleton project, these activities focus on altering the stocking rate, duration, or intensity of grazing to improve vegetation cover and soil health. Additionally, the project explicitly involves the application of synthetic or non-synthetic fertilizers to address material soil nutrient deficiencies, a practice aimed at boosting plant growth and subsequent carbon capture in the soil.

Environmentally, the Wombat and Young district is characterized by a temperate climate with an average annual rainfall of approximately 650mm, evenly distributed throughout the year but often winter-dominant. The local landscape typically features red chromosols and granitic soils, which are productive for agriculture but can be susceptible to acidification and structure decline without careful management. The proponents, including Jake Chandler and Gemma Wilkinson, are active participants in the local Landcare community, sharing insights on soil microbiology and ecosystem management.