Bongers Greycliffe-Jambin Wetland (Revoked)

Bongers Greycliffe-Jambin Wetland (Revoked) was a soil carbon sequestration project located in the locality of Greycliffe, approximately 30km north of Biloela in Central Queensland. Registered in May 2017 and covering a project area of 727 hectares, the project operated for eight years before being voluntarily revoked in August 2025. The site is situated within the Banana Shire, a region heavily utilized for dryland cropping, irrigation, and beef cattle grazing.

The project operated under the Measurement of Soil Carbon Sequestration in Agricultural Systems methodology (2018 version), having transitioned from an earlier 2014 determination. This methodology credits farmers for increasing soil organic carbon levels through management changes such as altering stocking density, retaining stubble, and applying nutrients to correct deficiencies. The inclusion of "Wetland" in the project title suggests the land may have included low-lying alluvial areas near Callide Creek or the Don River, which are prominent features of the local landscape.

Environmentally, the Greycliffe and Jambin region is characterized by a sub-tropical, semi-arid climate with an average annual rainfall of approximately 650mm, predominantly falling in summer. The soils in the Callide Valley are typically fertile, deep alluvial clays and loams, which are highly responsive to the soil carbon activities listed, such as converting from intensive tillage to reduced tillage. The project was revoked under Section 30 of the CFI Rule, which indicates a voluntary revocation by the proponent, Anthony Harold Bongers, often done when a project is no longer viable or the landholder wishes to exit the scheme without penalty (provided no credits are outstanding).