Trace elements are essential for maximum yield. A general trace element program for sands on old and new land is detailed in web page Trace elements for potatoes grown on coastal sands. All pre-plant fertilisers should be broadcast and incorporated by rotary hoe.
Nitrogen, phosphorus and potassium
Nitrogen applied before planting can be leached. To reduce this loss, the first nitrogen application should start post-planting but before emergence.
The rate of phosphorus to be applied should be determined from a pre-planting soil test. Phosphorus should be broadcast and incorporated prior to planting, along with potassium, magnesium (5kg Mg/ha) and trace elements.
Broadcast and incorporate potassium prior to planting as potassium sulphate at 200kg/ha, which will supply 82kg/ha potassium.