One of the aims of this project is to assess the N fertiliser requirements of cotton under more enlightened tillage systems currently being adopted. The application method for nitrogen fertiliser may change as the tillage system changes. For example, true minimum tillage is inconsistent with an anhydrous ammonia application shank working down the centre of each hill at 20 to 30 cm depth, particularly in wet soil. The alternatives are often less convenient than the traditional method and to date there has been little research in comparing methods of application. Results for the first two seasons of this experiment are summarised in this article.