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Improving profit from fertiliser through knowledge-based tools that account for temporal and spatial soil nutrient supply

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Soil testing the key to fertiliser strategy.. Northern region grain growers are being urged to test for subsoil phosphorus (P) in order to identify opportunities to bolster long-term yields through deep placement of P fertiliser... Deep soil testing to 40 centimetres or below across Western Australia's agricultural regions has revealed there is more nitrogen in the subsoil that can be accessed by crops than previously realised...