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How should phosphorus fertilizer be selected to suit a drip irrigation system?
Phosphorus fertilizer used in drip irrigation systems must be water-soluble. Traditionally used phosphorus fertilizers, such as superphosphate, have monocalcium phosphate as their main water-soluble component, but they also contain other insoluble impurities, so they are not suitable for drip irrigation systems. Monoammonium phosphate, diammonium phosphate, monopotassium phosphate and phosphoric acid are all completely soluble and are very...