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Nutritional interactions of N, P, K and S on the Darling Downs

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The current practice of relatively shallow applications of nitrogen and phosphorus are confirming yield responses to these nutrients in the long-term on the Darling Downs... Results of the experiments suggest that phosphorus is a key element for increasing crop growth and performance... The measurements taken now include some "farmer practice" references to benchmark against, or how much crop can be grown just doing as you are now...