Messner Carbon Project 11

Messner Carbon Project 11 is an agricultural soil carbon project located in the Shire of Westonia, approximately 50km east of Merredin and 300km east of Perth in Western Australia. Registered on June 20, 2022, the project originally covered 448.29 hectares. The Westonia region is situated where the Wheatbelt meets the Goldfields, and the general land use is predominantly broadacre wheat cropping and sheep farming, alongside historical and active gold mining. The area experiences a semi-arid climate characterised by hot, dry summers and low to moderate winter rainfall, averaging roughly 327 mm annually. Soils in this environment are typically sandplain and mallee soils, often interspersed with granite outcrops and salmon gum woodlands.

The project operates under the Estimation of Soil Organic Carbon Sequestration using Measurement and Models methodology. Soil carbon projects involve implementing new or materially different agricultural management practices to increase the storage of carbon within the soil profile. Standard requirements for this method include establishing a baseline of soil carbon through rigorous physical sampling, followed by ongoing measurement or modelling to demonstrate net sequestration over time. For this specific project, the primary activity involves applying synthetic or non-synthetic nutrients (fertiliser) to address a material deficiency in the soil. By correcting these deficiencies, the project aims to stimulate plant growth and increase the volume of organic matter drawn into the agricultural soil system.

The project is managed by Agriprove Solutions Pty Ltd, a major proponent and agent in the Australian soil carbon space. It is part of a large cluster of sequentially named "Messner Carbon Projects" (ranging from 1 to at least 19) in the immediate region. Interestingly, on December 4, 2025, a variation was made to the project area, resulting in specific land portions being removed from the original project boundaries.