Sulfur
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Regular use of superphosphate fertilisers containing S, has meant that S deficiencies were often not observed. However, because of the use of low S fertilisers (e.g. triple super, DAP and MAP) and the growing of canola which has a high sulfur requirement, S deficiency has now become more evident in many agricultural soils. Expression of S deficiency is more likely in soils with high N availability.
