In the global dairy farming arena, Australia and New Zealand are at the forefront of low cost dairy production. This competence can be largely attributed to cost effective production systems, quality pasture and the ability to milk cows without having to house them in sheds. In Australia we are able to combine our cost effective pasture based system with a more intensive partial mixed ration (PMR) system to produce high levels of cow productivity. Irrigation systems in the Southern States of Australia are coming under closer scrutiny, and the price and availability of.