A balanced nitrogen source, containing both nitrate-N and ammonium-N. A high nitrate concentration is a prerequisite to feed fast growing crops and ensure good root development, while the ammonium-N is important to keep a sustained delivery of nitrogen. In addition nitrate supports the uptake on positively charged nutrients (Ca++, Mg++, K+). Compared to pure ammonium or urea based fertilizers.
All phosphorus  is fully plant available, as water soluble orthophosphates and ammonium citrate soluble di-calciumphosphate. The combination of different forms give greater and a longer lasting availability of phosphorus to plants over a wide range of soil types. 
The potassium is derived from potasium sulfate (SOP) which improves the production of most fruits and vegetables. Potassium is essential for high yielding and high quality plants. An adequate supply of potassium has a positive effect on leaf, fruit and grain size. Fruit with an adequate potassium supply has higher total soluble solids (TSS) and therefore tastes better. Balancing potassium with other available cations in the soil is very important. High levels of potassium in the soil can suppress the availability of other nutrients, especially calcium and magnesium.