Peter Randall's pioneering work on soil sulfur deficiency underpins the extraordinary expansion of canola cropping in Australia. This has led to better crop rotation, which in turn has helped to exponentially increase wheat yields in Southern NSW. The benefits exceed $500 million anually. He also made a major contribution towards sustainable crop production on soils where toxic aluminium causes annual production losses and damage to the environment costing almost $1 billion. Randall led the team that first described a plant's tolerance mechanism to aluminium and discovered the gene responsible in wheat. Plant-based solutions to soil acidity can now complement liming.