Silos are structures designed for storing bulk materials. They come in various shapes and sizes, commonly cylindrical towers, and are used across diverse industries. Agriculture uses them for storing grain, silage, and other crops, while industrial applications include storing cement, coal, and other raw materials. Silos protect stored materials from the elements, pests, and spoilage. Their design often incorporates features that aid in loading and unloading, as well as mechanisms for controlling temperature and humidity to maintain quality. Different types of silos exist, such as tower silos, bunker silos, bag silos, and pit silos, each with its advantages and disadvantages regarding cost, capacity, and maintenance. Proper management is crucial for safe and efficient silo operation, including regular cleaning and inspection to prevent structural issues and ensure the longevity of the stored materials.
In 2005, Harvestore developed new unloaders with double the flow rate and greater chain strength to compete with bunkers. They also started using load sensing soft-start variable frequency drive motor controllers to prevent breakage.
In 2015, the first silo was decorated with mural-type paintings in Northam, Western Australia, marking the beginning of the Australian silo art movement.
In 2017, a trademark dispute arose over the term "silo art trail" between the Yarriambiack Shire Council and GrainCorp, with GrainCorp arguing that the term should be for community use. IP Australia upheld GrainCorp's opposition.
In 2019, following the Christchurch mosque attacks, a mural of Jacinda Ardern embracing a Muslim woman was painted on a silo in Brunswick, Melbourne, after crowdfunding raised A$11,000.
By 2024, the Australian Silo Art Trail had expanded to encompass more than 60 sites across the country.