Long-term impacts of on-farm research and extension on land condition and productivity in western Queensland

Abstract

Land condition decline is a prominent issue affecting northern Australia whether through natural disasters or improper grazing practices. Recovery of these rangeland systems can often be slow and complex processes involving best management practices and favourable seasons. Despite decades of research and extension, improved management practices such as matching stocking rates to available forage, and wet season spelling have not been widely adopted by industry. The ‘Developing Long-Term Carrying Capacity (LTCC) Models for the Desert Uplands (DU)’ project (2003–2005) aimed to address land degradation by establishing safe LTCC guidelines for the thirteen DU land types through modelling and grazier experiences. Nine properties were selected as calibration sites to verify the modelled estimates of LTCC. Host landholders participated in a peer-to-peer learning group, supported by ongoing engagement with the project leader (P Jones) over 19 years to implement project recommendations. For one host producer, involvement in this project provided them with knowledge and resources to implement improved management practices. The ongoing support that was provided by the project leader (P Jones) helped with various decisions such as proposing new fencelines, steps to implement wet season spelling, and understanding of the role of key perennial pasture species such as desert blue grass (Bothriochloa ewartiana). When monitoring sites were revisited in 2023, and management changes were documented, positive impacts on land condition and productivity were observed. This case study demonstrates the long-term benefits of on-farm research and extension in improving land condition and productivity. It underscores the critical role of sustained relationships between agencies and producers in achieving enduring practice change.