Tumbleton Soil Carbon Project

Tumbleton Soil Carbon Project is a soil carbon sequestration project located approximately 15km south-west of Young in the Hilltops region of New South Wales. Registered in April 2024, the project covers a land area of 1,144 hectares. The project is situated in the South West Slopes, a region characterized by a temperate climate with winter-dominant rainfall averaging around 600-650mm annually. The landscape is typically defined by undulating hills and fertile soils, predominantly Chromosols (red-brown earths) and Dermosols, which support a mix of broadacre cropping and livestock grazing.

This project operates under the 2021 Soil Carbon Methodology (Estimation of Soil Organic Carbon Sequestration using Measurement and Models). This method allows proponents to earn Australian Carbon Credit Units (ACCUs) by increasing soil organic carbon levels through improved land management practices. Unlike earlier methods that relied solely on physical sampling, the 2021 methodology permits the use of predictive modelling to estimate carbon stocks between sampling rounds, reducing administrative costs. The Tumbleton project specifically aims to build soil carbon by altering grazing stocking rates to improve vegetation cover and applying synthetic or non-synthetic fertilizers to address nutrient deficiencies.

The project is managed by the Wilkinson family (Bruce, Gemma, Jacob, and Tracey) with the assistance of Carbon Link Operations Pty Ltd, a prominent service provider in the Australian soil carbon market. Notably, the project underwent an administrative variation in August 2025 to adjust the registered project area. The use of Carbon Link as a participant suggests the project may utilize advanced soil sensing technology, such as the "NetSCAN" system, to baseline and monitor carbon levels across the property.