Hallmark Carbon Project

Hallmark Carbon Project is a soil carbon project located in the West Wimmera Shire region of Victoria, approximately 45km west of Horsham. It was registered in May 2018 and covers a 48.66-hectare project area.

Soil carbon projects operating under the "Estimation of Soil Organic Carbon Sequestration using Measurement and Models" methodology involve adopting new or altered agricultural management practices to increase the storage of carbon in the soil. Standard requirements for this methodology typically include rigorous baseline soil physical sampling followed by laboratory analysis, which can be combined with modeled estimates to accurately track the ongoing sequestration of soil organic carbon.

The West Wimmera area is characterized by a Mediterranean-style climate with moderate to low annual rainfall, generally around 550mm. The soils in this region are highly variable, commonly featuring grey cracking clays (Vertosols), sodic texture contrast soils (Sodosols), and sandy surface layers over clay subsoils. The primary regional land use is a mix of livestock grazing, specifically sheep and cattle, alongside dryland cropping operations.

To build soil carbon, the Hallmark Carbon Project focuses on altering the stocking rate, duration, and intensity of grazing to promote vegetative cover and improve overall soil health. Additionally, the project actively re-establishes and rejuvenates pastures through strategic seeding and pasture cropping.

Interestingly, this project has undergone several administrative variations since its inception. In November 2020, portions of the originally listed project area were removed. Originally managed by Corporate Carbon Solutions Pty Ltd, the project's main proponent was updated to Agriprove Solutions Pty Ltd in September 2025. Furthermore, the project successfully transitioned from the older 2014 Grazing Systems methodology to the updated 2021 Measurement and Models methodology in October 2025, ensuring it remains aligned with the latest soil carbon accounting standards.