Liquid fertilizer is regularly applied, as a top dressing, two or three times during the growing season. Application is normally made using multi outlet fertilizer nozzles. Their objective is to produce streams of liquid, rather than droplets, thereby minimizing the risk of scorch. They are bound by Torricelli's law which restricts the volumes as a function of the pressure. Trident overcomes this difficulty by using an auto adjusting valve.  For the normal range of liquid fertilizer application a user may well require two or even three sets of the conventional multi hole fertilizer nozzles.  The Trident will allow for a turn-down ratio in the order of 5:1 thus increasing the opportunity for much wider variations of applied volume, whilst holding a steady speed but also a low pressure. Typically 1.35 � 3.0 bar thereby maintaining the integrity of the individual streams of liquid fertilizer.

�Trident� - a novel device for the variable rate application of liquid fertilizer

248th National Meeting (2014)

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