Here are some of the common common/ essential you will find.
Wetting agents (Hydrolink range)
Improve water distribution in the soil. Can prevent hydrophobic soils. Makes the water more effective, allows for less runoff making the water get to where you want it. A properly balanced moisture content can also make other applications more effective. See Edition 1 for more information.
Kelpro (Seaweed Extract Concentrate)
Kelp increases the turfs resilience to stress, extreme temps etc., it improves the soil structure and promotes microbial activity in the soil, contains growth stimulating hormones that help promote root and shoot development.
Growth stimulants (Fertech bio, Auxinone, UMX)
Stimulates root development making the grass stronger and more robust.
Speeds up the process for seed germination and aids in recovery from renovation or disease and insect damage. It assists some nutrients to be more available in the soil by binding them and making them easier for the plant to uptake.
Organic matter
All lawns need a level of organic matter. This is to help provide nutrients and other compounds into the soil that help with nutrient retention and soil structure.
Humic and fulvic acid
Often used in conjunction with each other. Both play similar roles but differ ever so slightly in their growth stimulation. They are used to enhance soil structure to allow better nutrient transport, improve stress tolerance and enhance root development.
Humic Acid is a larger molecule that is better suited to soil applications, it is a slow working stimulant whereas the Fulvic Acid is a smaller lighter molecule, is a faster acting growth stimulant and even available when UMX is applied alone as a foliar first and watered in later.
Carbon
Carbon found in UMX is used to help the structure of the plant and soil. Aids photosynthesis, increases organic matter and nutrient uptake. Carbon supports the microbiology of the soil with assisting colonisation of beneficial bacteria and fungi, moisture and air retention then this flows onto even more nutrient chelation and availability.
This great cycle of excellent soil health has a snowball effect, ultimately resulting in the healthiest of turf surfaces possible that is very resistant to stresses like the heat, the cold and disease.