Weelhamby Farm Soil Improvement Project

Weelhamby Farm Soil Improvement Project is a soil carbon sequestration project located approximately 30km northeast of Perenjori in the Mid West region of Western Australia. Registered in December 2021, the project originally covered over 5,200 hectares within the Northern Wheatbelt, a region traditionally dominated by broadacre cropping and sheep grazing.

The project operates under the 2021 Soil Carbon methodology, which credits increases in Soil Organic Carbon (SOC) achieved through new land management activities. Weelhamby Farm functions as a significant demonstration site for the region, transitioning from intensive cereal cropping and set-stock grazing to a system of rotational grazing with multi-species perennial pastures. The proponent, Weelhamby Land Pty Ltd, works in partnership with Carbon West and the Carbon Farming Foundation to implement these changes alongside a complementary reforestation project that establishes biodiversity corridors across the property.

The Perenjori area is characterized by a semi-arid, Mediterranean climate with low annual rainfall, typically falling below 300mm. The landscape features iconic "red dirt" soils, often consisting of red sandy loams, sandy clay loams, and sandplains. This project is particularly notable for being a recipient of the Western Australian Government's Carbon Farming and Land Restoration Program funding, aiming to prove that soil carbon levels can be successfully increased even in these marginal, low-rainfall farming environments. A variation noted in August 2025 indicates a reduction in the registered project area, likely refining the boundary to exclude non-compliant or non-arable zones.