Hallmark Carbon Project

Hallmark Carbon Project is a soil carbon project located in the West Wimmera local government area of Victoria, approximately 70km west of the major regional center of Horsham. It was registered in May 2018 and currently covers an active project area of 48.66 hectares. The broader West Wimmera region is heavily utilized for agricultural production, predominantly broadacre dryland cropping, such as wheat and barley, alongside sheep grazing. The local environment experiences a moderate, Mediterranean-style climate with semi-arid rainfall averaging roughly 450-550mm annually. The soils in this area are largely duplex texture-contrast soils (featuring lighter sandy or loamy surface soils over heavy clay subsoils), as well as self-mulching Vertosols and cracking clays.

Soil carbon projects operating under the Estimation of Soil Organic Carbon Sequestration using Measurement and Models methodology aim to increase carbon storage in agricultural soils through the introduction of new, eligible land management activities. The standard requirements for this methodology involve establishing a baseline carbon level through rigorous soil core sampling, followed by subsequent sampling rounds and modeling to verify the amount of carbon sequestered over the project's lifetime. To achieve sequestration, the Hallmark Carbon Project specifically focuses on altering the stocking rate, duration, and intensity of grazing to promote vegetative ground cover and improve overall soil health. This is paired with re-establishing and rejuvenating the pasture through direct seeding and pasture cropping.

The project has undergone a few notable administrative adjustments since its inception. In November 2020, a variation was processed to reduce the project area, removing some of the originally listed land parcels. More recently, in September 2025, the project transferred ownership as the proponent varied from Corporate Carbon Solutions Pty Ltd to AGRIPROVE SOLUTIONS PTY LTD. Subsequently, in October 2025, the project was updated from the older 2014 soil carbon methodology (Sequestering Carbon in Soils in Grazing Systems) to the newer, more robust 2021 Measurement and Models determination.