Grazing Land Management

pasture trial

Explore the resources below covering techniques and strategies for improving pasture productivity in a sustainable way.

South West NRM’s comparison of perennial and annual pasture quality has been completed.  

This study compared the forage quality of perennial pastures and annual pastures on six South West Western Australian livestock properties at three time periods: 

  • November 2025 (11/11/25 to 09/12/25): At this time, annuals were maturing more than perennials, with the former drying off (e.g. 10% less moisture content). 
  • April 2026 (10/04/26 to 21/04/2026): The season broke on 28 March with 40-60 mm falling across all sites over two days. Annual pasture samples were of dry biomass from the 2025 season because new annuals were only just emerging. In comparison, fresh perennial regrowth was sampled because their faster growth rates and bigger root systems meant they were ready to graze earlier.  
  • May 2026 (29/04/26 to 26/05/26): Fresh annual and perennial pasture growth from the 2026 season was sampled. It was noticeable in May that annual plants were still very easy to pull out of the ground, while perennials were much better anchored.  

The properties are located near the towns of Boyup Brook, Brunswick, Busselton (Sabina River) and Manjimup (Perup, Wilgarup and Cosy Creek).   

 

Perennial pastures were typically dominated by perennial ryegrass (four of six sites) or cocksfoot (2 sites). Annual pastures were dominated by annual ryegrass, with some weeds such as wild oats present in November and April samples. Sub clover was also present in November but degrading and difficult to sample. Further details on the perennial pastures and sites are described here (Noting that “Busselton Grower 2” was not included in this study).  

Results were provided to cattle nutrition consultant Martin Staines who has completed a report as follows.

 For more information, see mla-how-do-i-optimise-perennial-grass-management-in-late-spring-and-summer.pdf which includes links to get perennial grasses to thrive and survive, and how to remove excess pasture 

 SouthWest NRM’s FEaST Project is supported by the Australian Government through funding from the Natural Heritage Trust under the Climate-Smart Agriculture Program and delivered by South West NRM, a member of the Commonwealth Regional Delivery Partners panel.

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