For applied fertiliser to be efficiently used by the plant, the pre-requisites are that the plant must have a healthy root system; the soil structure is optimised to hold and deliver water and nutrients to the plant roots; and applied nutrients are placed so plant roots can reach them when needed.
This fact sheet from VegNET Tasmania steps growers through the key considerations to maximise the use of your fertiliser, including establishing healthy plant roots, improving soil structure and establishing strong fertiliser practices using the 4Rs (right source, right rate, right time, right place).