Good Article on Farm Subsidies

"Production decisions, though, were constrained by the type of land being farmed. In order to be competitive, farmers had to keep costs down and this meant using resources efficiently. Subsidies for fertilizer had resulted in its wasteful application. Without subsidies, fertilizer use decreased, water quality increased, and yields were not affected. Additionally, farmers fit their production to the land. Marginal land, which was only farmed to receive subsidies, went out of production and reverted to native bush."