This project evaluates the legislation implemented by states and territories to limit access to security sensitive ammonium nitrate which directly affects the way primary producers manage crop nitrogen needs. This involved the undertaking of a grower survey and literature review to examine the effects that the changes were having on the Australian vegetable industry. Financial analysis of the legislation’s impact suggested that costs are small relative to the value of the industry, although there is potential for individual growers or enterprises to face moderately higher costs when complying or changing fertiliser regimes. The project provides a clear understanding of the impacts brought about by SSAN legislation and associated changes to the supply and sale of SSAN fertilisers on the vegetable industry in Australia.