Hallmark Carbon Project

Hallmark Carbon Project is a soil carbon sequestration project located approximately 35 kilometers south of Nhill in the West Wimmera region of Victoria. Registered in May 2018, the project covers a small agricultural area of 48.66 hectares. The site is situated within a landscape traditionally used for broadacre mixed farming, including dryland cropping and livestock grazing.

The project operates under the 2021 Soil Carbon methodology, having transitioned from an earlier 2014 determination. This methodology credits the measured increase of soil organic carbon (SOC) stocks resulting from changes in land management. Specifically, the Hallmark Carbon Project focuses on re-establishing or rejuvenating pastures through seeding and pasture cropping, alongside altering grazing intensity and duration. These activities are designed to increase biomass and vegetative cover, which in turn sequesters carbon into the soil profile.

Environmentally, the West Wimmera region is characterized by a semi-arid to temperate climate with an average annual rainfall of approximately 400-500mm. The local soil composition typically features grey Vertosols (cracking clays) and Sodosols, often displaying "gilgai" micro-relief formations common to the Wimmera's clay plains. These heavy clay soils have significant potential for carbon storage when management practices improve soil structure and retention.

The project is managed by Agriprove Solutions Pty Ltd, a prominent developer in the Australian soil carbon sector. Since its registration, the project has undergone administrative updates, including a shift in the proponent entity in 2025 and adjustments to the project area in 2020. It serves as an example of how smaller landholdings in established farming districts can participate in the Australian Carbon Credit Unit (ACCU) scheme.