It was with great sadness and regret that soil scientists around the world learnt that Associate Professor Geoff Humphreys of Macquarie University, Sydney, Australia died suddenly on Sunday 12 August 2007. He had been out jogging through bushland nearhis home when he suffered a heart attack. He was only 54. Geoff was a highly respected and valued member of the Australian and international soil science community. He was renowned as a committed and tireless researcher and teacher with phenomenal levels of energy and productive output. His passion for understanding processes of soil formation and landscape development was an inspiration to all. Geoff played an active role in the IUSS and the Australian Society of Soil Science (ASSSI), and his passingis a terrible loss to soil science. The tributes to Geoff that have come from friends and colleagues all around the world bear testimony to the high esteem in which he was held.
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